SSR-40DA Solid State Relay

  1. Reliable product quality,
  2. Single phase DC controlled AC solid state relay,
  3. Maximum load current 40 amps,
  4. Specifically designed for heater use,
  5. 2 years extra long warranty.

SSR-40DA Solid State Relay Introduction:

  • The SSR is an important component in the heating control system, acting as an actuator controlled by the pid temperature controller, frequently turning the heating element on or off. The SSR-40DA is our load current 40 amp DC controlled AC SSR. Its control voltage is 3-32VDC, and the load voltage range is 24-380VAC.
  • This 40 Amp DC AC SSR switching mode can be either zero-crossing or random turn-on triggering. Zero-crossing triggering can reduce noise but is not suitable for inductive loads. If your load is inductive load, please choose the random turn-on SSR. The two switching modes output waveforms are as following:

zero-crossing or random turn-on triggering SSR output waveforms

Picture sources from:

  • This SSR-40DA SSR can handle resistive loads up to 4000W. If the load exceeds this value, consider using a higher current load such as our SSR-80DA SSR or SSR-100DA SSR.
  • In addition, the SSR-40DA can be widely used in motor control, replacing AC contactors in some applications.
  • Compared with magnetic relays and AC contactors, it has the advantages of no noise, no sparks, and fast switching speed.
  • Another thing to note is that this SSR generates a lot of heat when working, and a suitable heat sink such as W-70 heatsink should be used to help cool it.
  • On how to wire this SSR, please read this article: How To Wire A Solid State Relay?

Product Dimension:

The SSR 40DA SSR is very compact, overall dimension is 44.8*57.4*28mm.

SSR 40DA SSR product dimension


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