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What is this component? is it a solid state relay? Answered

Picture of

i want to know if it is a solid state relay. i got it in an old photocopier matsushita.

on the component it is written 
sf16drz-h1-4
input    DC4~7v
OUTPUT  AC 210V 16A
K975c
MITSUBISHI Electric

it has 4 leads out. 2 small and 2 big. I googled it but no success
and if you know explain to me how this component works. it has  a large heatsink on the top

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Jack A LopezBest Answer (author)2010-10-20

The object in your blurry pictures is indeed a solid state relay. 

I could not find the exact data sheet for this SSR, but I found this which is similar:
http://www.crydom.com/en/Products/Catalog/e_z.pdf

The way it works is you put the leads labeled "output" in series with an AC source and an AC load.  

When you apply a DC voltage, in the range 4 to 7 volts, to the leads labeled "input", the magical silicon switch inside closes, and AC current flows to your AC load. 

See also:
http://en.wikipedia.org/wiki/Solid_state_relay

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ARJOON (author)Jack A Lopez2010-10-20

thank you but can i also drive a dc load with it

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Jack A Lopez (author)2010-10-20

Regarding the question of switching a DC load:

It might turn on, but not turn off. If the switch is a TRIAC, basically two back-to-back SCRs, then it relies on the fact that the AC waveform to go zero periodically, to turn itself off.

Also note, in such a "stuck" turned on state, it will turn off if the current is interrupted, e.g. by opening another switch in series with the load, or just unplugging things.

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kelseymh (author)2010-10-19

"I googled it but no success." You're kidding, right? Cut-and-paste, and the seventh hit gave the answer.

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ARJOON (author)kelseymh2010-10-20

but i really did not see it anyway thank you

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frollard (author)kelseymh2010-10-19

yup, I think he was kidding.

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