This part is a kind of semiconductor called MJL21194.

Function of this product has COMPLEMENTARY SILICON POWER TRANSISTORS.

Manufacturers : ON

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MJL21193 (PNP), MJL21194 (NPN) Silicon Power Transistors The MJL21193 and MJL21194 utilize Perforated Emitter technology and are specifically designed for high power audio output, disk head positioners and linear applications. Features • Total Harmonic Distortion Characterized • High DC Current Gain • Excellent Gain Linearity • High SOA • These Devices are Pb−Free and are RoHS Compliant* MAXIMUM RATINGS Rating Symbol Value Unit Collector−Emitter Voltage Collector−Base Voltage Emitter−Base Voltage Collector−Emitter Voltage − 1.5 V Collector Current − Continuous Collector Current − Peak (Note 1) Base Current − Continuous Total Power Dissipation @ TC = 25_C Derate above 25_C VCEO VCBO VEBO VCEX IC ICM IB PD 250 400 5 400 16 30 5 200 1.43 Vdc Vdc Vdc Vd [ ... ]

MJL21194 PDF Datasheet Download