Hi. Thanks for helping.
I have a round 2 wire device I need to identify.
Its about 1/4 inch 7mm dia.
It is marked..
TNR
241
7c22
I can not find on web.

Thanks
Rich

 

It appears to be MOV not a zener?
Is there a problem that you need to identify it?
Max.

 

I agree with MaxHeadRoom. The device looks like it has a crack in the case.
They are designed to absorb a voltage spike, that's what looks like happened.

 

115ac is across a 5w 3ohm in series with this Device.
A bridge rectifier taps in parallel with the device.
It got hooked to 220ac and some smoke came out.

 

1
It got hooked to 220ac and some smoke came out.

That'l do it.
Max.

 

It's a 7mm 241v MOV.

Will be easily available from digikey or element14.

 

Ok..
Thanks.. I think I see how its a TVR.
I have included the circuit that this is in.
Oh. I found that the 3 ohm resistor is open.
Hope the squib and resistor are all that are wrong.
.....
So to anyone... what voltage is the DC motor.
It rectifies at about ??? Half wave 170vdc peek.
So Va to ground after bridge is ??

This circuit runs a DC motor forward or reverse by rocker.

I would like to know a little more.

Rich

 

If it is a SCR type bridge it will run a 90v motor on 120vac and 180v motor on 240v.
Max.

 

Trying to attach schem..

 

90VDC motor.
Max.

 

Thanks for your help!
Good to know.
Rich

 

It's a 7mm 241v MOV.

Will be easily available from digikey or element14.

After more checking I am now confident that this is a 240V TVR/MOV...

 

Thanks for all your help. I was able to repair that board.

 

It appears to be MOV not a zener?
Is there a problem that you need to identify it?
Max.

The "241" is probably the same old 2 digits and multiplier; 240V - would be a fairly generous margin for 110V mains.

They have a bit of a tendency to shatter or disintegrate when they fail - but I'm not too sure just how bad the resin dipped variety can get before you can see visible signs.

 

Here is the datasheet.

 

There is another board I am working on fixing.
The device is about .25" wide .12" thick and .35" tall.
Silver. I'm pretty sure it's a capacitor of some kind.
Can sort of see layers thru the end.
Silver component on left..

Can anyone tell for sure?

Thanks.

 

There is another board I am working on fixing.
The device is about .25" wide .12" thick and .35" tall.
Silver. I'm pretty sure it's a capacitor of some kind.
Can sort of see layers thru the end.
Silver component on left..

Can anyone tell for sure?

Thanks.

There are some pretty good clues in the screen print on the PCB.

 

104 polyester cap = 0.1uF.

In that size it's a 50v part.