IGBT Cross Reference STGB10N50A

Magnetite · Guest

I'm trying to repair a voltage regulator that has a blown IGBT marked STGB10N50A. I have the datasheet for it. I can't find anyone that sells it, and I can't find a cross reference to an IGBT that might work. It's rated 500V, 10A at 100 deg. C, 20A at 25 deg. C, 100 watts at 100 deg C.

It's in an application that will probably have 220 volts and about 3 amps with 60 Hz switching. Can anyone help me find a source for a replacement - either identical or a reasonable substitute. All I really need is the number of something available from one of the big online parts houses Newark, Jameco, etc.

Thanks for any help.

vtech · Joined: 08 May 2006 Posts: 1264 Location: USA

Sounds like a device manufactured by ST micro?
Have you tried contacting them? While it is not shown on their site, there are many others. Sometimes it may be a device manufactured for another name brand equipment or simply something that has been replaced by a better device.
Is this for a motor driver application or switchmode power supply? 60hz is too low of a frequency?
I can see the 10amp500 volt rating but what is important is the switch time on/off rating.

Guest · Posted: Fri Jan 20, 2012 4:29 pm Post subject:

Guest · Posted: Fri Jan 20, 2012 5:23 pm Post subject:

I called ST Micro. It's not anywhere in their computer system. She said it must have been obsoleted many years ago.

I think I'll try to sub an IRG4BC30U. The specs are similar
for IR vs ST:

Vce is 600V vs. 500V
Ic 23A vs. 20 at 25C
Pd 100W both at same temp 25C
Vce (sat) 1.95-2.1V at 12A vs 1.85 (no max specified) at 10A
Vge (threshold) 3-6 vs 2-4V
Both without the internal diode

Finding a comparable Vce (sat) and high enough Pd was hard for something in stock. I don't have a circuit diagram, so I know very little about how it needs to perform.

vtech · Joined: 08 May 2006 Posts: 1264 Location: USA

Looks like a pretty solid device. The turnon/off ratings are in the nanosecond region and very stable.
If there is no issue with the winding, it should be more than adequate.
More that likely it was made & stamped specifically for another OEM supplier. Seems like a common practice to disown the number. I use to run in to the same situation with other brand semiconductors.