BSP51 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 60 V
• Collector-Base Voltage, max: 80 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 1 A
• Collector Dissipation: 1.25 W
• DC Current Gain (h_fe): 1000
• Transition Frequency, min: 200 MHz
• Operating and Storage Junction Temperature Range: -65 to +150 °C
• Package: SOT-223

Here is an image showing the pin diagram of this transistor.The BSP51 transistor is marked as "BSP51".The complementary PNP transistor to the BSP51 is the BSP61.You can replace the BSP51 with the BSP52, BSP52T1, BSP52T1G, BSP52T3 or BSP52T3G.