Testing MB104 bridge rectifier

[cmj21973]

I'm need to know if this bridge rectifier is still good to use.
The outer casing broke apart while removing it from the PCB. I can super glue it back together but, it has a small heat sink that attaches to it.

DMM diode test:

(+) (-)
probe probe

1) + - OL
2) - + .986
3) AC1 AC2 OL
4) AC2 AC1 OL
5) + AC1 OL
6) + AC2 OL
7) AC1 + .525
8) AC2 + .528
9) AC1 - OL
10) AC2 - OL
11) - AC1 .540
12) - AC2 .527

I'm thinking to replace it since I have to glue the outer case back together and bolt a heatsink back on it.
Also because of the #11 reading.

[Jack Crow]

Re: Testing MB104 bridge rectifier

CMJ,
Rule of thumb.
If the case is cracked the part is gone.

Semiconductors and oxygen make a real poor mix.
Don't trust it. Don't glue it. Toss it as fast as possible.

As for testing, I use this gizmo.
I call it my cheap curve tracer.
With a scope in X/Y mode, you can use it to do a very quick check of diode junctions and other parts.

With a diode across the probes the sharper angle where conduction happens the better the junction is.

http://www.flickr.com/photos/9010884...8650/lightbox/

Hope this helps.
Jack Crow in VA

[cmj21973]

Re: Testing MB104 bridge rectifier

CMJ,
Rule of thumb.
If the case is cracked the part is gone.

Semiconductors and oxygen make a real poor mix.
Don't trust it. Don't glue it. Toss it as fast as possible.

It's like a ceramic cup with the internal components encapsuled in epoxy. I was more concerned with heat transfer and the super glue not holding due to temperature.

I'll order a new one.

[jetadm123]

Re: Testing MB104 bridge rectifier

Readily available through digikey:

http://search.digikey.com/scripts/Dk...b104+rectifier