Mosfet replacement

[shorteddiode]

I hope I didn't post this in the wrong spot

Does anyone know of a replacement for a STTH20P03S Mosfet?
Out of a Samsung Z board. I can't find a data sheet on it

[tom66]

Re: Mosfet replacement

200V, 3A device, I believe.

[shorteddiode]

Re: Mosfet replacement

Thanks tom, any idea where I can find a data sheet for it?

[tw2005]

Re: Mosfet replacement

I hope I didn't post this in the wrong spot

Does anyone know of a replacement for a STTH20P03S Mosfet?
Out of a Samsung Z board. I can't find a data sheet on it

I think the important thing to note here is it's in fact a fast recovery diode, common cathode.

Pins 1-3 will test short in cct, A-K-A , centre pin is cathode.
Datasheet I found does not match the number exactly

[tw2005]

Re: Mosfet replacement

300v, 20a diode

[shorteddiode]

Re: Mosfet replacement

Thanks everyone.

[junkyardherbie]

Re: Mosfet replacement

I think the important thing to note here is it's in fact a fast recovery diode, common cathode.

Pins 1-3 will test short in cct, A-K-A , centre pin is cathode.
Datasheet I found does not match the number exactly

When you say in cct, do you mean with the component installed in circuit? Or do you mean in a circuit continuity test with the component out of circuit? Sorry I'm not sure what your abbreviation means... I know this is an old thread but I have this same exact rectifier and pins A1 and A2 measure continuity with no resistance between them (shorted) with the component out of circuit. I am understanding this as a failure? Thanks to all in advance.

[tw2005]

Re: Mosfet replacement

When you say in cct, do you mean with the component installed in circuit? Or do you mean in a circuit continuity test with the component out of circuit? Sorry I'm not sure what your abbreviation means... I know this is an old thread but I have this same exact rectifier and pins A1 and A2 measure continuity with no resistance between them (shorted) with the component out of circuit. I am understanding this as a failure? Thanks to all in advance.

two anodes , 1 cathode. A1, A2 are 2 anodes.

anode to anode = short it's the same reference point = normal

Anode to cathode in diode will be 0 one way and whatever voltage drop the other. Could be 0.3- 0.5 as long as it's not shorted both directions it's ok.

In or out will be the same. Now if the whole this was shorted then you'd remove and retest because other things connected could be shorted but the diode is ok.

[attainteddragon]

Re: Mosfet replacement

in laymans terms, there is a diode between the outer pins and the centre pin, but both outer pins are tied together, so it is shorted out of circuit. this is how it should read, there fore, it is good. if you have continuity between either of the outer pins and the centre pin, then it is bad.

tw beat me to it, :P

[junkyardherbie]

Re: Mosfet replacement

Thank you all! I have continuity between A1 and A2, and .378 between A1 and K with + to anode and - to cathode, nothing with leads reversed. Same result from A2 to K. From your teachings this means it's good... I appreciate the help. I didn't realize the anodes were tied together, I thought they were separated by their respective diodes... on to further testing!