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william jones
william jones
Associate
July 9, 2018
Question

transistor ST32d/127 p5one can anybody help

  • July 9, 2018
  • 3 replies
  • 1280 views

Posted on July 09, 2018 at 17:00

ithey are from a heat zink on a 24v dc to dc motor control unit made in 2002 by sevcon model mos90b there are 2rows of 6 on the neg 6 input and 6 ouput  hi i have found a matching number stp50ne10

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3 replies

AvaTar
AvaTar
Senior III
July 10, 2018
Posted on July 10, 2018 at 12:44

ithey are from a heat zink...

I guess this is supposed to mean they are mounted on a heat sink.

Could you put a photo of the transistors in (with the type designation readable) in here ?

With the proper name, you could do a search for the datasheet yourself.

william jones
william jonesAuthor
Associate
July 11, 2018
Posted on July 11, 2018 at 14:17

0690X00000604etQAA.jpgi have now posted the transistor 

AvaTar
AvaTar
Senior III
July 11, 2018
Posted on July 11, 2018 at 15:02

Don't know this part, and I can't find anything. Perhaps it's a dual-diode ?

I would suggest to post your question to the 'Power Mangement and Motor Control' forum here :

https://community.st.com/community/power-management-and-motor-control

 

I expect better chances there.

Brian Kling
Brian Kling
Senior
July 13, 2018
Posted on July 13, 2018 at 06:19

I will move it there.

Peter Fournier
Peter Fournier
Associate
July 13, 2018
Posted on July 13, 2018 at 14:49

I did a google search '32D127 transistor' and it came up with a TIP127 form monarch, newark # 3c0638.

The photo on the data sheet has the markings blacked out, but maybe Monarch can help you confirm it is the replacment

AvaTar
AvaTar
Senior III
July 14, 2018
Posted on July 14, 2018 at 11:06

Not sure if this is equivalent.

There are several transistors built in a TO220 package, with 127 as part of the type code.

The '32D' seems not to fit ST's naming scheme.

You can try to measure the resistance values between the terminals, which should give you an idea if it's a BJT, a MOSFET, a diode, or fried junk.

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