MJH6287G
onsemi
TRANS PNP DARL 100V 20A TO247-3
MOQ 1 · Tube · RoHS · EIA-481 · DAP/DDP · T/T
Technical specifications
| Parameter / Attribute | Specification / Value |
|---|---|
| Mounting | Through Hole |
| FET type | PNP - Darlington |
| Voltage - collector emitter breakdown | 100 V |
| Current - collector (Ic) | 20 A |
| Current - collector cutoff | 1mA |
| DC current gain (hFE) (Min) @ ic, vce | 750 @ 10A, 3V |
| Power - max | 160 W |
| Frequency - transition | 4MHz |
| Operating temperature | -65°C ~ 150°C (TJ) |
| Package | Tube |
| Case | TO-247-3 |
| Vce saturation (Max) @ ib, ic | 3V @ 200mA, 20A |
Need Stock or a Drop-in Second-Source for MJH6287G?
Package: TO-247 (formerly TO-218) · Pin-compatible replacements with immediate Shenzhen spot stock
The TIP142 NPN and TIP147 PNP are the 10A complementary Darlingtons of audio output stages, solenoid and relay drivers, and the lamp and motor outputs of industrial gear: 100V, 10A, 125W in the TO-247 body, with a current gain of 1000 that turns a milliampere of base current into amperes at the load. That gain is the entire design contract - circuits built around it deliver almost no drive, which is why the classic repair failure happens when a well-meaning substitution fits a genuine, expensive, "better" power transistor with gain 100 and the output stage quietly starves. Since the old TO-218 body was discontinued in 2012, TO-247 is the only current home, including the onsemi MJH6284/MJH6287 pair.
Verified Pin-Compatible Replacements (3 verified alternatives)
The 5A TO-220 Sibling
Shenzhen Spot Stock (24-48h Dispatch)
The same 100V Darlington family at half the current and one body smaller: 5A in TO-220, gain in the same 1000 class - the right part for loads the bigger die never needed to carry.
Same 100V class across the pairing.
The Current Production Pair
Shenzhen Spot Stock (24-48h Dispatch)
The onsemi Darlingtons that carry the same function in current production: TO-247 complementary pair with the gain contract intact - the practical supply when TIP142 allocation is thin.
Same class; verify the exact grade against the schematic.
The 60V and 80V Grade Steps
Shenzhen Spot Stock (24-48h Dispatch)
The lower-voltage members of the same row: 60V and 80V VCEO against the 100V of the 142/147 - identical current, gain and body.
The whole difference: rails inside 60V or 80V take the cheaper grade; rails above their class need the 100V part.
Buyer & Quality Checklist for Sourcing Alternatives
- The gain contract is the part: hFE at least 1000 at 5A (500 at 10A). The base drive in a Darlington circuit is a milliampere-scale design - fitting a gain-100 power transistor (the impressive NJW/MJ-class parts) starves the stage and overheats the driver.
- VCE(sat) of about 2V is the Darlington tax: near 20W of heat inside the die at 10A. The TO-247 tab, the grease and the heatsink are design elements, not accessories.
- These are monolithic Darlingtons with internal base-emitter shunt resistors - not two discrete transistors in a can. A discrete rebuild must reproduce the resistor network, or the drive math changes.
- Some ST builds co-pack an antiparallel collector-emitter diode: a substitution with a diode-less equivalent changes inductive-load behavior in relay, solenoid and motor duty.
- Voltage grades run 60V / 80V / 100V across the row: substitutes read the measured rail, and spikes from inductive loads count against the class.
- The pair is complementary: TIP142 with TIP147 (and the grades together) in push-pull and bridge outputs. Replace both sides in one generation or the output stage balances differently than designed.
Frequently Asked Technical Questions
Q: Can I use a TIP122 instead of a TIP142?
A: Same 100V Darlington family, half the current (5A against 10A) and a smaller TO-220 body. It substitutes only after the load is re-measured and the mounting question answered; the reverse move wants the larger land but the drive contract is unchanged.
Q: Why did an amplifier fail after fitting a "stronger" transistor?
A: Because the stage was a Darlington design expecting gain of 1000, and a plain power transistor with gain around 100 presents the drive network with a tenfold larger base current demand. The driver starves, distortion rises, and heat moves to the wrong die.
Q: Are the TIP142 and TIP147 still in production?
A: The old TO-218 body was discontinued in 2012; TO-247 is the current home for the row, including the onsemi MJH6284G / MJH6287G pair that carries the same Darlington function in current production.