MJE221 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 40 V
• Collector-Base Voltage, max: 60 V
• Emitter-Base Voltage, max: 7 V
• Collector Current − Continuous, max: 4 A
• Collector Dissipation: 15 W
• DC Current Gain (h_fe): 40 to 150
• Transition Frequency, min: 10 MHz
• Operating and Storage Junction Temperature Range: -65 to +150 °C
• Package: TO-126

Here is an image showing the pin diagram of this transistor.The complementary PNP transistor to the MJE221 is the MJE231.You can replace the MJE221 with the 2N4921, 2N4921G, 2N4922, 2N4922G, 2N4923, 2N4923G, BD187, BD189, BD785, BD787, BD787G, BD789, MJE220, MJE222, MJE223, MJE224, MJE225, MJE240, MJE241 or MJE242.