MJ491 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -60 V
• Collector-Base Voltage, max: -60 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -4 A
• Collector Dissipation: 87.5 W
• DC Current Gain (h_fe): 30 to 200
• Transition Frequency, min: 4 MHz
• Operating and Storage Junction Temperature Range: -65 to +200 °C
• Package: TO-3

Here is an image showing the pin diagram of this transistor.The complementary NPN transistor to the MJ491 is the MJ481.You can replace the MJ491 with the 2SA656A, 2SA657A, 2SA744, 2SA745, 2SA745A, 2SA746, 2SA747, 2SA753, 2SA907, BD316 or BD318.