STB1277 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -30 V
• Collector-Base Voltage, max: -30 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -2 A
• Collector Dissipation: 0.625 W
• DC Current Gain (h_fe): 100 to 320
• Transition Frequency, min: 170 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-92

The STB1277 is manufactured in a plastic TO-92 case. When looking at the flat side with the leads pointed downward, the three leads emerging from the transistor are, from left to right, the emitter, collector, and base leads.
Here is an image showing the pin diagram of this transistor.The STB1277 transistor can have a current gain of 100 to 320. The gain of the STB1277-O will be in the range from 100 to 200, for the STB1277-Y it will be in the range from 160 to 320.The 2SA1203 (SOT-89), FMMT549 (SOT-23) and KTA1663 (SOT-89) is the SMD version of the STB1277 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the STB1277 with the 2SA1273, 2SA928A, 2SB1229, 2SB892, 2SB985, KSA928A, KTA1273 or KTA1282.