delabs Circuits

Tuesday, November 15, 2016

Three Phase AC SSR for 1 HP Motor

I need to build a three phase AC(in 120V)-AC(out 440V) solid state relay to turn on or off a small(1hp) three phase AC motor. Do you have any idea?

Can I use three MOC3043 and three TIC236E triacs of course with all opto LEDs in series?

Mail from FJP Brazil


See my SSR Circuits , Solid State Relays or SSR Choose a DC Control and AC Load SSR, That is what you seem to indicate.

1 hp = 745.699872 watts

Let triac have 10 A and 600V AC ratings, BTA12600 But now BTA12600 is obsolete, adapt to what is available in your country.

MOC3043 is fine, isolation must be good, take care. Use a Heatsink.
ON-OFF Control inputs can be parallel not series.

Here is a picture of a Solid State Contacter from Power IO

Three Phase AC SSR for 1 HP Motor

On this page you can see a 3 phase SSR i built. Three-Phase-SSR.

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