onsemi NJL3281DG NPN Transistor, 25 A, 260 V, 5-Pin TO-264

The Bipolar Power Transistor has been designed to eliminate thermal equilibrium lag time and bias trimming in audio amplifier applications. It can also be used in other applications as a transistor die protection device.

Thermally matched bias diode to eliminate thermal runaway
Instant thermal bias tracking for superior sound quality
Absolute Thermal Integrity
High safe operating area
Pb-Free Packages are Available
Applications:
High-fidelity consumer audio products
Professional audio amplifiers