STB1277-Y 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): 160 to 320
• Transition Frequency, min: 170 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-92

The STB1277-Y 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-Y transistor can have a current gain of 160 to 320. The gain of the STB1277 will be in the range from 100 to 320, for the STB1277-O it will be in the range from 100 to 200.The 2SA1203 (SOT-89), 2SA1203-Y (SOT-89), FMMT549 (SOT-23), FMMT549A (SOT-23), KTA1663 (SOT-89) and KTA1663Y (SOT-89) is the SMD version of the STB1277-Y transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the STB1277-Y with the 2SA1273, 2SA1273-Y, 2SA1382, 2SA1680, 2SA1761, 2SA928A, 2SA928A-Y, 2SB1229, 2SB892, 2SB985, KSA928A, KSA928A-Y, KTA1273, KTA1273Y, KTA1282 or KTA1282Y.