I've got some Toshiba IGBTs going into an SC board and it looks like I've misidentified them.
Casing is marked 45G128 on one, the other 45G128 with a "R" underneath.
They behave differently testing in diode mode. The "R" version once turned on reads 1.305 and holds steady.
The other starts at 1.8 then rises very quickly until it switches off at 2.08.I'm suspicious this may be faulty.
The replacements I have (no R) starts at 1.6 and rises steadily and noticeably slower and turns off 2.08.
I've made the same mistake with 30F125 . These have an R underneath but ordered 35F125 (no R).
One is shorted, the other behaves the same as the 45G128 "R" and stays switched on at 1.63.
I've read this in a datasheet but the way the case is marked it does not match their numbering scheme?
R: N-channel RC-IGBT with
built-in freewheeling diode?
Google not working for me on this.
Picture not great but you can just make out the "R" under the 45 on the right transistor
Casing is marked 45G128 on one, the other 45G128 with a "R" underneath.
They behave differently testing in diode mode. The "R" version once turned on reads 1.305 and holds steady.
The other starts at 1.8 then rises very quickly until it switches off at 2.08.I'm suspicious this may be faulty.
The replacements I have (no R) starts at 1.6 and rises steadily and noticeably slower and turns off 2.08.
I've made the same mistake with 30F125 . These have an R underneath but ordered 35F125 (no R).
One is shorted, the other behaves the same as the 45G128 "R" and stays switched on at 1.63.
I've read this in a datasheet but the way the case is marked it does not match their numbering scheme?
R: N-channel RC-IGBT with
built-in freewheeling diode?
Google not working for me on this.
Picture not great but you can just make out the "R" under the 45 on the right transistor
Attached Files