{"id":23129,"date":"2026-11-05T18:12:50","date_gmt":"2026-11-05T10:12:50","guid":{"rendered":"https:\/\/lorentzzi.com\/?p=23129"},"modified":"2026-11-06T14:27:32","modified_gmt":"2026-11-06T06:27:32","slug":"ksd301-ksd302-ksd303-thermostats","status":"publish","type":"post","link":"https:\/\/lorentzzi.com\/fr\/ksd301-ksd302-ksd303-thermostats\/","title":{"rendered":"Thermostats KSD301, KSD302, KSD303 : d\u00e9finitions, diff\u00e9rences et mode d'emploi"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"23129\" class=\"elementor elementor-23129\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-acd09af e-flex e-con-boxed e-con e-parent\" data-id=\"acd09af\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-99cdad4 elementor-widget elementor-widget-text-editor\" data-id=\"99cdad4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Savez-vous pourquoi une bouilloire isotherme parvient \u00e0 maintenir une temp\u00e9rature constante sans faillir ?<\/span><\/p><p><span style=\"font-weight: 400;\">La raison est simple : les bouilloires isothermes peuvent s'\u00e9teindre et se remettre en marche automatiquement, car elles sont \u00e9quip\u00e9es d'un thermostat \u00e0 contact normalement ferm\u00e9 de type KSD301, KSD302 ou KSD303. Lorsque la temp\u00e9rature de l'eau atteint la temp\u00e9rature r\u00e9gl\u00e9e, le thermostat coupe l'alimentation \u00e9lectrique et arr\u00eate le chauffage. Lorsque la temp\u00e9rature descend en dessous de la temp\u00e9rature r\u00e9gl\u00e9e, le chauffage reprend, et ce processus se r\u00e9p\u00e8te.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-041bd0f elementor-widget elementor-widget-image\" data-id=\"041bd0f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"512\" src=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/11\/KSD301-KSD302-and-KSD303-Thermostats.jpg\" class=\"attachment-large size-large wp-image-23132\" alt=\"Thermostats KSD301, KSD302 et KSD303\" srcset=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/11\/KSD301-KSD302-and-KSD303-Thermostats.jpg 1024w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/11\/KSD301-KSD302-and-KSD303-Thermostats-300x150.jpg 300w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/11\/KSD301-KSD302-and-KSD303-Thermostats-768x384.jpg 768w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/11\/KSD301-KSD302-and-KSD303-Thermostats-18x9.jpg 18w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/11\/KSD301-KSD302-and-KSD303-Thermostats-600x300.jpg 600w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/11\/KSD301-KSD302-and-KSD303-Thermostats-64x32.jpg 64w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fbed22a elementor-widget elementor-widget-text-editor\" data-id=\"fbed22a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Afin de mieux comprendre les thermostats KSD301 et KSD302, nous allons les pr\u00e9senter en d\u00e9tail sous les quatre aspects suivants :<\/span><\/p><ol><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Que sont les thermostats KSD301, KSD302 et KSD303 ?<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Quelles sont leurs principales diff\u00e9rences ?<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Comment utiliser les thermostats KSD301, KSD302 et KSD303 ?<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Applications typiques des thermostats KSD301, KSD302 et KSD303.<\/span><\/li><\/ol><p><span style=\"font-weight: 400;\">R\u00e9pondons maintenant \u00e0 ces questions une par une.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d24b9e9 elementor-widget elementor-widget-heading\" data-id=\"d24b9e9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Que sont les thermostats KSD301, KSD302 et KSD303 ?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c2ca0f7 elementor-widget elementor-widget-image\" data-id=\"c2ca0f7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"1024\" height=\"512\" src=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/11\/The-Bimetallic-Strip-Inside-the-KSD-Thermal-Switch-Expands-and-Deforms-Due-to-Heat.jpg\" class=\"attachment-large size-large wp-image-23133\" alt=\"\" srcset=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/11\/The-Bimetallic-Strip-Inside-the-KSD-Thermal-Switch-Expands-and-Deforms-Due-to-Heat.jpg 1024w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/11\/The-Bimetallic-Strip-Inside-the-KSD-Thermal-Switch-Expands-and-Deforms-Due-to-Heat-300x150.jpg 300w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/11\/The-Bimetallic-Strip-Inside-the-KSD-Thermal-Switch-Expands-and-Deforms-Due-to-Heat-768x384.jpg 768w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/11\/The-Bimetallic-Strip-Inside-the-KSD-Thermal-Switch-Expands-and-Deforms-Due-to-Heat-18x9.jpg 18w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/11\/The-Bimetallic-Strip-Inside-the-KSD-Thermal-Switch-Expands-and-Deforms-Due-to-Heat-600x300.jpg 600w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/11\/The-Bimetallic-Strip-Inside-the-KSD-Thermal-Switch-Expands-and-Deforms-Due-to-Heat-64x32.jpg 64w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0a92d0a elementor-widget elementor-widget-text-editor\" data-id=\"0a92d0a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Les mod\u00e8les KSD301, KSD302 et KSD303 sont des interrupteurs thermiques bim\u00e9talliques courants. Lorsque la temp\u00e9rature atteint une valeur pr\u00e9d\u00e9finie, la lame bim\u00e9tallique se d\u00e9forme sous l'effet de la chaleur (dilatation et contraction thermiques), ce qui provoque la fermeture ou l'ouverture des contacts. Les mod\u00e8les KSD301 et KSD302 sont largement utilis\u00e9s dans les \u00e9quipements \u00e9lectriques pour la r\u00e9gulation de la temp\u00e9rature de l'eau, la pr\u00e9vention du fonctionnement \u00e0 sec et la protection contre la surchauffe.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-95e2679 elementor-widget elementor-widget-video\" data-id=\"95e2679\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;youtube_url&quot;:&quot;https:\\\/\\\/youtu.be\\\/zDArNMnyF9c?si=YsImSIV4tVsX9Vve&quot;,&quot;video_type&quot;:&quot;youtube&quot;,&quot;controls&quot;:&quot;yes&quot;}\" data-widget_type=\"video.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-wrapper elementor-open-inline\">\n\t\t\t<div class=\"elementor-video\"><\/div>\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8ccee71 elementor-widget elementor-widget-text-editor\" data-id=\"8ccee71\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Ces interrupteurs thermiques offrent une large plage de temp\u00e9ratures r\u00e9glables, allant de 0 \u00b0C, 20 \u00b0C, 40 \u00b0C, 65 \u00b0C, 80 \u00b0C, 100 \u00b0C jusqu'\u00e0 300 \u00b0C maximum.<\/span><\/p><p><span style=\"font-weight: 400;\">Ils prennent en charge deux modes de contact : normalement ferm\u00e9 (NC) et normalement ouvert (NO).<\/span><\/p><p><span style=\"font-weight: 400;\">Pour les appareils de chauffage tels que les bouilloires \u00e9lectriques, le thermostat KSD301 ou KSD302, de type normalement ferm\u00e9, est un choix courant. Lorsque la temp\u00e9rature atteint la valeur pr\u00e9r\u00e9gl\u00e9e (par exemple, 100 \u00b0C), le thermostat passe de l'\u00e9tat ferm\u00e9 \u00e0 l'\u00e9tat ouvert, coupant ainsi le circuit de chauffage. Une fois que la temp\u00e9rature est redescendue en dessous du seuil d\u00e9fini, les contacts se referment, r\u00e9tablissant ainsi le chauffage.<\/span><\/p><p><span style=\"font-weight: 400;\">Pour les ventilateurs de refroidissement ou les syst\u00e8mes de r\u00e9frig\u00e9ration, on utilise g\u00e9n\u00e9ralement des thermostats KSD301\/KSD302 \u00e0 contact normalement ouvert pour la protection contre la surchauffe. Par exemple, un thermostat KSD301 de 40 \u00b0C peut \u00eatre install\u00e9 au fond de la chambre de chauffage. D\u00e8s que la temp\u00e9rature d\u00e9passe 40 \u00b0C, les contacts du thermostat se ferment et le ventilateur se met automatiquement en marche, prot\u00e9geant ainsi les composants internes contre les dommages caus\u00e9s par la surchauffe.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2dadbf8 elementor-widget elementor-widget-heading\" data-id=\"2dadbf8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Principales diff\u00e9rences entre les interrupteurs thermiques KSD301, KSD302 et KSD303<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f1478ab elementor-widget elementor-widget-text-editor\" data-id=\"f1478ab\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Lors de l'achat d'un thermostat \u00e0 action instantan\u00e9e de la s\u00e9rie KSD, les fournisseurs vous demandent toujours quel mod\u00e8le vous pr\u00e9f\u00e9rez : KSD301, KSD302 ou KSD303 ? Ils sont tr\u00e8s comp\u00e9tents, mais quelles sont les principales diff\u00e9rences entre ces trois mod\u00e8les de thermostats ?<\/span><\/p><p><span style=\"font-weight: 400;\">La principale diff\u00e9rence r\u00e9side dans leur courant nominal de contact et leur capacit\u00e9 de charge.<\/span><\/p><ul><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">KSD301 : Courant nominal de contact 10 A,<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">KSD302 : Courant nominal de contact 16 A,<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">KSD303 : Courant nominal de contact : 30 A.<\/span><\/li><\/ul><p><span style=\"font-weight: 400;\">Vous devez choisir le mod\u00e8le adapt\u00e9 en fonction de la puissance nominale de votre appareil de chauffage, de votre \u00e9quipement de r\u00e9frig\u00e9ration ou de tout autre \u00e9quipement.<\/span><\/p><ul><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">KSD301 : Convient aux charges r\u00e9sistives jusqu'\u00e0 1,5 kW \u00e0 220 V CA,<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">KSD302 : Convient aux charges r\u00e9sistives jusqu'\u00e0 2,0 kW \u00e0 220 V CA,<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">KSD303 : Convient aux charges r\u00e9sistives jusqu'\u00e0 3,5 kW \u00e0 220 V CA.<\/span><\/li><\/ul><p><span style=\"font-weight: 400;\">Pour les charges de puissance sup\u00e9rieures aux plages indiqu\u00e9es ci-dessus, utilisez le thermostat KSD avec un <\/span><span style=\"color: #ff0000;\"><a style=\"color: #ff0000;\" href=\"https:\/\/lorentzzi.com\/fr\/solid-state-relays\/\"><span style=\"font-weight: 400;\">relais \u00e0 semi-conducteurs<\/span><\/a><\/span><span style=\"font-weight: 400;\"> ou <\/span><span style=\"color: #ff0000;\"><a style=\"color: #ff0000;\" href=\"https:\/\/lorentzzi.com\/fr\/products\/accessories\/cjx2-contactor\/\"><span style=\"font-weight: 400;\">Contacteur CA<\/span><\/a><\/span><span style=\"font-weight: 400;\">.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f19fb39 elementor-widget elementor-widget-heading\" data-id=\"f19fb39\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Comment utiliser les thermostats KSD301, KSD302 et KSD303 ?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-92bec52 elementor-widget elementor-widget-text-editor\" data-id=\"92bec52\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Une utilisation correcte des interrupteurs thermiques de la s\u00e9rie KSD vous permettra d'assurer un contr\u00f4le ad\u00e9quat de la temp\u00e9rature et de prot\u00e9ger votre \u00e9quipement contre les risques de surchauffe.\u00a0<\/span><\/p><p><span style=\"font-weight: 400;\">D'apr\u00e8s notre exp\u00e9rience, il convient de suivre les 4 \u00e9tapes suivantes.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-095b27c elementor-widget elementor-widget-heading\" data-id=\"095b27c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">\u00c9tape 1 : Choisir les thermostats KSD301, KSD302 et KSD303 adapt\u00e9s<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a5e1af9 elementor-widget elementor-widget-heading\" data-id=\"a5e1af9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">1. Choisissez une temp\u00e9rature adapt\u00e9e<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-46dceb9 elementor-widget elementor-widget-text-editor\" data-id=\"46dceb9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Les mod\u00e8les KSD301, KSD302 et KSD303 sont des interrupteurs de r\u00e9gulation \u00e0 temp\u00e9rature fixe, totalement diff\u00e9rents des <\/span><span style=\"color: #ff0000;\"><a style=\"color: #ff0000;\" href=\"https:\/\/lorentzzi.com\/fr\/tcx5-universal-pid-temperature-controller\/\"><span style=\"font-weight: 400;\">R\u00e9gulateurs de temp\u00e9rature PID<\/span><\/a><\/span><span style=\"font-weight: 400;\"> qui permettent un r\u00e9glage plus souple de la temp\u00e9rature.\u00a0<\/span><\/p><p><span style=\"font-weight: 400;\">Par cons\u00e9quent, pour choisir le commutateur adapt\u00e9, la premi\u00e8re \u00e9tape consiste \u00e0 s\u00e9lectionner la temp\u00e9rature appropri\u00e9e.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-228fab0 elementor-widget elementor-widget-image\" data-id=\"228fab0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"1024\" height=\"512\" src=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/11\/KSD-Series-Thermostats-Used-in-Conjunction-With-SSR-Mounted-on-Heat-Sink.jpg\" class=\"attachment-large size-large wp-image-23134\" alt=\"\" srcset=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/11\/KSD-Series-Thermostats-Used-in-Conjunction-With-SSR-Mounted-on-Heat-Sink.jpg 1024w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/11\/KSD-Series-Thermostats-Used-in-Conjunction-With-SSR-Mounted-on-Heat-Sink-300x150.jpg 300w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/11\/KSD-Series-Thermostats-Used-in-Conjunction-With-SSR-Mounted-on-Heat-Sink-768x384.jpg 768w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/11\/KSD-Series-Thermostats-Used-in-Conjunction-With-SSR-Mounted-on-Heat-Sink-18x9.jpg 18w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/11\/KSD-Series-Thermostats-Used-in-Conjunction-With-SSR-Mounted-on-Heat-Sink-600x300.jpg 600w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/11\/KSD-Series-Thermostats-Used-in-Conjunction-With-SSR-Mounted-on-Heat-Sink-64x32.jpg 64w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1ea2fa6 elementor-widget elementor-widget-text-editor\" data-id=\"1ea2fa6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Par exemple, si vous souhaitez couper l'alimentation lorsque la temp\u00e9rature d\u00e9passe 80 degr\u00e9s Celsius (par exemple, en installant ces interrupteurs de contr\u00f4le de temp\u00e9rature KSD301, KSD302 ou KSD303 sur notre <\/span><span style=\"color: #ff0000;\"><a style=\"color: #ff0000;\" href=\"https:\/\/lorentzzi.com\/fr\/ssr-heat-sinks\/\"><span style=\"font-weight: 400;\">Dissipateur thermique SSR<\/span><\/a><\/span><span style=\"font-weight: 400;\"> pour couper l'alimentation lorsque la temp\u00e9rature d\u00e9passe 80 degr\u00e9s Celsius, prot\u00e9geant ainsi le <\/span><span style=\"color: #ff0000;\"><a style=\"color: #ff0000;\" href=\"https:\/\/lorentzzi.com\/fr\/solid-state-relay-problems-and-solutions-the-ultimate-guide\/\"><span style=\"font-weight: 400;\">SSR : dommages dus \u00e0 la surchauffe<\/span><\/a><\/span><span style=\"font-weight: 400;\">), vous devez choisir les mod\u00e8les KSD301, KSD302 ou KSD303 de type \u00ab normalement ferm\u00e9 \u00bb, avec une plage de temp\u00e9rature de 80 degr\u00e9s Celsius.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1c94d1f elementor-widget elementor-widget-heading\" data-id=\"1c94d1f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">2. S\u00e9lectionnez le type de sortie<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9d6e460 elementor-widget elementor-widget-text-editor\" data-id=\"9d6e460\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Les interrupteurs de r\u00e9gulation de temp\u00e9rature de la s\u00e9rie KSD se divisent en deux types : les interrupteurs normalement ferm\u00e9s et les interrupteurs normalement ouverts. Les interrupteurs normalement ferm\u00e9s sont g\u00e9n\u00e9ralement utilis\u00e9s pour la protection contre la surchauffe, tandis que les interrupteurs normalement ouverts servent couramment au d\u00e9marrage de ventilateurs en fonction de la temp\u00e9rature, aux alarmes, etc.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5c0b04c elementor-widget elementor-widget-heading\" data-id=\"5c0b04c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">3. D\u00e9terminer la m\u00e9thode de r\u00e9initialisation<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7f35b55 elementor-widget elementor-widget-text-editor\" data-id=\"7f35b55\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">En r\u00e8gle g\u00e9n\u00e9rale, les interrupteurs thermiques KSD301, KSD302 et KSD303 sont \u00e9quip\u00e9s par d\u00e9faut d'une fonction de r\u00e9armement automatique, ce qui signifie qu'ils ferment ou ouvrent automatiquement les contacts lorsque la temp\u00e9rature est sup\u00e9rieure ou inf\u00e9rieure \u00e0 la valeur de consigne. Si vous avez besoin d'un thermostat sans fonction de r\u00e9armement, veuillez consulter votre fournisseur.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f5bb9ce elementor-widget elementor-widget-heading\" data-id=\"f5bb9ce\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">\u00c9tape 2 : Installation des thermostats KSD301, KSD302 et KSD303<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-33103e8 elementor-widget elementor-widget-text-editor\" data-id=\"33103e8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Comme vous pouvez le constater, la surface ronde m\u00e9tallique du thermostat de la s\u00e9rie KSD fait office de capteur de temp\u00e9rature.<\/span><\/p><p><span style=\"font-weight: 400;\">Cette surface ronde en m\u00e9tal doit \u00eatre en contact \u00e9troit avec la surface chauffante et solidement fix\u00e9e \u00e0 l'aide de deux vis M4.<\/span><\/p><p><span style=\"font-weight: 400;\">De plus, il convient d'appliquer une fine couche de p\u00e2te thermique entre la surface de contact et l'objet \u00e0 chauffer afin de r\u00e9duire les espaces d'air et d'assurer ainsi une mesure pr\u00e9cise de la temp\u00e9rature.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-dbd5fda elementor-widget elementor-widget-image\" data-id=\"dbd5fda\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"512\" src=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/11\/Apply-Thermal-Grease-to-the-KSD301-Thermostat.jpg\" class=\"attachment-large size-large wp-image-23142\" alt=\"Appliquez de la p\u00e2te thermique sur le thermostat KSD301\" srcset=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/11\/Apply-Thermal-Grease-to-the-KSD301-Thermostat.jpg 1024w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/11\/Apply-Thermal-Grease-to-the-KSD301-Thermostat-300x150.jpg 300w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/11\/Apply-Thermal-Grease-to-the-KSD301-Thermostat-768x384.jpg 768w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/11\/Apply-Thermal-Grease-to-the-KSD301-Thermostat-18x9.jpg 18w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/11\/Apply-Thermal-Grease-to-the-KSD301-Thermostat-600x300.jpg 600w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/11\/Apply-Thermal-Grease-to-the-KSD301-Thermostat-64x32.jpg 64w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-09619c8 elementor-widget elementor-widget-heading\" data-id=\"09619c8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">\u00c9tape 3 : C\u00e2blage des thermostats KSD301, KSD302 et KSD303<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-cf4c23d elementor-widget elementor-widget-text-editor\" data-id=\"cf4c23d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Le thermostat de la s\u00e9rie KSD ne comporte que deux bornes sans distinction de polarit\u00e9, ce qui permet de le raccorder en s\u00e9rie dans un circuit. Il est recommand\u00e9 de le raccorder en s\u00e9rie avec le fil sous tension (220 V) de la charge de chauffage.\u00a0<\/span><\/p><p>Voici un sch\u00e9ma de c\u00e2blage simple et type (lors du c\u00e2blage, il convient d'utiliser certains dispositifs de protection, tels qu'un disjoncteur miniature (MCB) ou un disjoncteur diff\u00e9rentiel \u00e0 protection contre les surintensit\u00e9s (RCBO)) :<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6351d68 elementor-widget elementor-widget-image\" data-id=\"6351d68\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"512\" src=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/11\/KSD-Series-Thermostats-Wiring-Diagram.jpg\" class=\"attachment-large size-large wp-image-23135\" alt=\"Sch\u00e9ma de c\u00e2blage des thermostats de la s\u00e9rie KSD\" srcset=\"https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/11\/KSD-Series-Thermostats-Wiring-Diagram.jpg 1024w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/11\/KSD-Series-Thermostats-Wiring-Diagram-300x150.jpg 300w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/11\/KSD-Series-Thermostats-Wiring-Diagram-768x384.jpg 768w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/11\/KSD-Series-Thermostats-Wiring-Diagram-18x9.jpg 18w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/11\/KSD-Series-Thermostats-Wiring-Diagram-600x300.jpg 600w, https:\/\/lorentzzi.com\/wp-content\/uploads\/2026\/11\/KSD-Series-Thermostats-Wiring-Diagram-64x32.jpg 64w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-94b4759 elementor-widget elementor-widget-text-editor\" data-id=\"94b4759\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Remarque : le courant de charge ne doit pas d\u00e9passer le courant nominal du thermostat. Pour les syst\u00e8mes de chauffage \u00e0 forte puissance (par exemple, sup\u00e9rieurs \u00e0 3,5 kW), il est recommand\u00e9 d'utiliser un KSD301 pour commander un relais statique ou un contacteur CA ; ne jamais alimenter directement des \u00e9l\u00e9ments chauffants \u00e0 courant \u00e9lev\u00e9.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1701d88 elementor-widget elementor-widget-heading\" data-id=\"1701d88\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">\u00c9tape 4 : Essai de fonctionnement, utilisation \u00e0 long terme et entretien<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c85643e elementor-widget elementor-widget-text-editor\" data-id=\"c85643e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Une fois les trois premi\u00e8res \u00e9tapes termin\u00e9es, vous pouvez passer \u00e0 la phase d'essai, \u00e0 l'exploitation \u00e0 long terme et \u00e0 l'entretien courant.<\/span><\/p><p><span style=\"font-weight: 400;\">Commencez par mettre bri\u00e8vement le circuit sous tension afin de v\u00e9rifier son bon fonctionnement. Par exemple, si vous avez choisi un thermostat KSD301 normalement ferm\u00e9 \u00e0 80 \u00b0C et que vous souhaitez qu'il prot\u00e8ge votre relais statique (SSR) contre la surchauffe, pendant le test de fonctionnement, chauffez la sonde de temp\u00e9rature m\u00e9tallique du KSD301 jusqu'\u00e0 80 \u00b0C et v\u00e9rifiez s'il coupe le signal de commande du SSR. Si l'alimentation du SSR est imm\u00e9diatement coup\u00e9e, le KSD301 fonctionne correctement. Dans le cas contraire, v\u00e9rifiez soigneusement le c\u00e2blage ou assurez-vous que le thermostat n'est pas d\u00e9fectueux.<\/span><\/p><p><span style=\"font-weight: 400;\">Une fois les essais r\u00e9ussis, le syst\u00e8me peut \u00eatre mis en service \u00e0 long terme. Veuillez effectuer un entretien r\u00e9gulier, notamment en v\u00e9rifiant son bon fonctionnement tous les trois mois.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2b2d4bf elementor-widget elementor-widget-heading\" data-id=\"2b2d4bf\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Applications typiques des thermostats KSD301, KSD302 et KSD303<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1cf588d elementor-widget elementor-widget-text-editor\" data-id=\"1cf588d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Les protecteurs thermiques bim\u00e9talliques KSD301, KSD302 et KSD303 sont largement utilis\u00e9s dans les \u00e9quipements de chauffage en raison de leur facilit\u00e9 d'utilisation ; ils peuvent \u00e9galement \u00eatre utilis\u00e9s dans les moteurs, les transformateurs, etc. pour pr\u00e9venir les pannes dues \u00e0 la surchauffe.<\/span><\/p><p><span style=\"font-weight: 400;\">Vous pouvez consulter les informations suivantes pour en savoir plus sur les appareils compatibles avec les protecteurs thermiques bim\u00e9talliques KSD301, KSD302 et KSD303 :<\/span><\/p><ol><li style=\"font-weight: 400;\" aria-level=\"1\"><b>Appareils de chauffage \u00e9lectriques<\/b><span style=\"font-weight: 400;\">: Chauffe-eau \u00e9lectriques, bouilloires \u00e9lectriques, cafeti\u00e8res, distributeurs d'eau, robinets d'eau chaude, fers \u00e0 repasser \u00e0 vapeur.<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><b>Coussins chauffants et films chauffants<\/b><span style=\"font-weight: 400;\">: films chauffants en PI, coussins chauffants en silicone, chauffe-lits, chauffe-pieds.<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><b>Petits appareils de chauffage domestiques<\/b><span style=\"font-weight: 400;\">: Fours \u00e9lectriques, friteuses \u00e0 air chaud, grils \u00e9lectriques, porte-serviettes, radiateurs de salle de bains.<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><b>Protection contre la surchauffe des moteurs et des transformateurs<\/b><span style=\"font-weight: 400;\">: Petits moteurs, moteurs de ventilateurs, transformateurs d'alimentation, blocs-batteries, modules de charge.<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><b>Petits ensembles de chauffage industriels<\/b><span style=\"font-weight: 400;\">: Plaques chauffantes industrielles, petits moules chauffants, chauffages d'appoint pour armoires, unit\u00e9s de chauffage \u00e0 thermostat.<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><b>Autres \u00e9quipements<\/b><span style=\"font-weight: 400;\">:<\/span> <span style=\"font-weight: 400;\">D\u00e9shumidificateurs, humidificateurs, st\u00e9rilisateurs, s\u00e9choirs \u00e0 vaisselle, machines \u00e0 yaourt.<\/span><\/li><\/ol>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fcfaa42 elementor-widget elementor-widget-heading\" data-id=\"fcfaa42\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Conclusion<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ea90ba0 elementor-widget elementor-widget-text-editor\" data-id=\"ea90ba0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">En r\u00e9sum\u00e9, les mod\u00e8les KSD301, KSD302 et KSD303 sont des protecteurs thermiques bim\u00e9talliques simples, faciles \u00e0 installer et largement utilis\u00e9s dans le domaine de la r\u00e9gulation du chauffage.<\/span><\/p><p><span style=\"font-weight: 400;\">Que vous souhaitiez maintenir une temp\u00e9rature constante ou prot\u00e9ger d'autres \u00e9quipements contre les dommages caus\u00e9s par la surchauffe, les thermostats KSD301, KSD302 et KSD303 peuvent vous aider.<\/span><\/p><p><span style=\"font-weight: 400;\">Si vous souhaitez en savoir plus sur les protecteurs thermiques bim\u00e9talliques KSD301, KSD302 et KSD303, n'h\u00e9sitez pas \u00e0 nous contacter, <\/span><span style=\"color: #ff0000;\"><a style=\"color: #ff0000;\" href=\"https:\/\/lorentzzi.com\/fr\/\"><span style=\"font-weight: 400;\">Lorentzzi Electric<\/span><\/a><\/span><span style=\"font-weight: 400;\">, pour plus d'informations !<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>Do you know why a thermos kettle can maintain a constant temperature without failure? The reason is simple: thermos kettles can automatically shut off and restart because they have a built-in KSD301, KSD302, or KSD303 normally closed contact thermostat. When the water temperature reaches the set temperature, the thermostat cuts off the power and stops [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":23130,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center 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center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-23129","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-temperature-controller"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.5 (Yoast SEO v28.8) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>KSD301, KSD302, KSD303 Thermostats: Definitions, Differences and How to Use<\/title>\n<meta name=\"description\" content=\"This blog post will explain what the KSD301, KSD302, and KSD303 thermostats are, what the differences are between them, and how they work.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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