What is this transistor ?

Thread Starter

jojo005

Joined Jan 16, 2017
9
Does anybody could help me to recognize this transistor ?
If it is a transistor, it could be a voltage regulator ...

Thank's a lot.




 
Last edited:

Dodgydave

Joined Jun 22, 2012
11,285
What you have there is a Switchmode psu, chances are there are two of them on the heatsinks next to the large electrolytic capacitor. in a pushpull mode,

If its on the other large heatsink, its a Dual Shockley diode.
 

AnalogKid

Joined Aug 1, 2013
10,987
It is the single transistor, right of the main power transformer, left of the bulk holdup cap. Based on the bottom side photo, I think the right-most heatsink also has a single TO-220 device.

ak
 

Thread Starter

jojo005

Joined Jan 16, 2017
9
Thank's Wayneh for the link, in fact it is the subject.
I'll replace all Caps and the transistors whose base is burnt
I'll tell if it will works again or not.
Last questions : this two transistors are good for replacement ?
this one
this other one

Is there is any special electrolytic Cap to cbe changed or are they
kind of generic ?

Thank's to all who helped me up to now
 

N11778

Joined Dec 4, 2015
176
Make sure it's not this transistor PHD13005 "D" for diode
this is the one that was in my cooler it has a built in C E reverse diode in it.
the dash "- 2" on yours mite mean no diode or (has diode) not sure .
If one of them is still good you can check for the diode with a meter
 

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wayneh

Joined Sep 9, 2010
17,496
Is there is any special electrolytic Cap to cbe changed or are they
kind of generic ?
I would keep an eye out for higher temperature rating and lower ESR (or lower impedance or whatever they choose to call it). Most of the caps could probably be generic but at least a couple of mine were originally "low impedance" and carry quite a bit of current. Also keep an eye on dimensions and even lead diameters. It can be a real pain if the new cap won't fit the room available for it.
 

ian field

Joined Oct 27, 2012
6,536
Hello,

It could be the MJE13005 transistor:
http://www.datasheetcatalog.com/datasheets_pdf/M/J/E/1/MJE13005.shtml

Bertus

PS three of your dropbox images do not show.
Please upload the images to the forum using the "Upload a File" button.
I'd put it a bit stronger than "could be". Its a pretty common device for that sort of application.

For substitution - if there's 2 of them; its a push pull switcher, for a PSU running from 220V, a 500V transistor will probably do, if there's only 1; its a flyback converter and the transistor needs to be rated *AT LEAST* 600V.
 
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