BF821 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -300 V
• Collector-Base Voltage, max: -300 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -0.05 A
• Collector Dissipation: 0.25 W
• DC Current Gain (h_fe): 50
• Transition Frequency, min: 60 MHz
• Operating and Storage Junction Temperature Range: -65 to +150 °C
• Package: SOT-23

Here is an image showing the pin diagram of this transistor.The BF821 transistor is marked as "1W".The complementary NPN transistor to the BF821 is the BF820.You can replace the BF821 with the 2SA1721-O, PBHV9040T or STR2550.