2STN2550 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -50 V
• Collector-Base Voltage, max: -50 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -5 A
• Collector Dissipation: 1.6 W
• DC Current Gain (h_fe): 110 to 350
• 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 2STN2550 transistor is marked as "N2550".The complementary NPN transistor to the 2STN2550 is the 2STN1550.You can replace the 2STN2550 with the NZT45H8.