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From: John Robertson <jrr@flippers.com>
Newsgroups: sci.electronics.design
Subject: Re: SSR question
Date: Wed, 11 Sep 2024 21:55:57 -0700
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On 2024-09-11 8:08 p.m., john larkin wrote:
> 
> Given a power supply that needs 120 volts AC input, I'd like to use a
> small front-panel power switch at some low voltage, not run the AC
> line up to the front panel.
> 
> Do people make SSRs that would do that, accept a low-voltage switch
> closure to switch AC?
> 

Sure, there are the TRAIC SSR bricks that take 4 to 32VDC to switch - 
and can handle tens of amps.

https://www.digikey.ca/en/products/filter/solid-state-relays-ssr/183?s=N4IgTCBcDaIIIGEAEAXATgSwIYGMQF0BfIA

And also the opto-isolated TRAICs like the MOC302x family from Lite-On.

Of course you need some power to enable that stuff to run - perhaps a 
capacitor/resistor driven supply that sucks a tiny amount of current 
from the power line to enable the drive circuit?

John :-#)#

-- 
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