Do solid state AC relays work with lesser voltages?

[Oznog]

I have a solid state relay which says on the diagram "240V-480V". I need to use it to switch a 120v motor.

Now, if it had JUST said 480V, then I'd just take it as a maximum. But this implies that 240V is a recommended minimum, doesn't it? I mean if 480v is the maximum then you wouldn't bother to say 317v or 240v or 120v or 50v was also possible.

The seller did describe it as 24-480v. (24, not 240 as stated on the device). Most of what's written on the device is Chinese anyways, a typo would not be unheard of.

OK to use on 120v??

 

[dknguyen]

I think it's okay. if you need something to help settle your mind, how about the fact that AC spends some time at all voltages from zero to peak.

 

[Boncuk]

a triac - also an optotriac - doesn't care about the voltage you switch as long as it is within safe limits (according to data sheet; voltage and current).

You can even switch 6VAC with it or wire two of them in series (making an AND function).

Boncuk

 

[bassnut]

Crydon 480v SSRs (fairly typical examples) are speced 46-480v AC, so no problem id say.

 

[Hero999]

The problem is whether the current flowing into the input is high enough to trigger it.

 

[dknguyen]

THat's more the drive circuit's responsibility isn't it?