MJD112
Internet Systems Consortium, Inc.
Needs validationhigh risk
MJD112 is a lower-current NPN Darlington candidate for MJD122 only after derating review.
Best Alternatives to MJD122
MJD122 is an NPN Darlington power transistor in TO-252-2L. Current evidence does not support a verified pin-compatible replacement.
AI replacement insight
Electrical riskhigh
8A and damper diode must be matched.
Package riskmedium
TO-252-2L claims need pinout proof.
Firmware risklow
No firmware interface involved.
Sourcing riskmedium
Several candidates are obsolete.
Can it be replaced directly?
No verified direct replacement is supported by the provided fields.
Best replacement path
Use only NPN Darlington candidates, then verify pinout, diode, SOA, and thermal ratings in datasheets.
Main risk
Most candidates differ in polarity, Darlington structure, or current rating.
Recommended alternatives
1Alternative comparison matrix
| Feature / factor | MJD122 | MJD112 | Alt 2 | Alt 3 | Compatibility / risk |
|---|---|---|---|---|---|
| Package | TO-252-2L | TO-252-2L; TO-251 conflict | TO-252-2L; TO-251 conflict — conflicting ES package | ||
| Pinout | 3 pins | 3 pins | 3 pins — pin functions not shown | ||
| Voltage | 100 V | 100 V | 100 V — no 10% margin | ||
| Current | 8 A | 2 A | 2 A — large downgrade | ||
| Power | 1.5 W | 1 W | 1 W — less dissipation | ||
| Temperature | -55 to 150C | -55 to 150C | -55 to 150C — range matches |
Application & sourcing insights
Questions & answers
From the provided candidates, MJD112 is the only same NPN Darlington type, but it is a high-risk downgrade.