STR2550 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -500 V
• Collector-Base Voltage, max: -500 V
• Emitter-Base Voltage, max: -7 V
• Collector Current − Continuous, max: -0.5 A
• Collector Dissipation: 0.5 W
• DC Current Gain (h_fe): 100 to 300
• 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 STR2550 transistor is marked as "2550".The complementary NPN transistor to the STR2550 is the STR1550.