2SA1271-O Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -30 V
• Collector-Base Voltage, max: -35 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -0.8 A
• Collector Dissipation: 0.6 W
• DC Current Gain (h_fe): 100 to 200
• Transition Frequency, min: 120 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-92

The 2SA1271-O 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 2SA1271-O transistor can have a current gain of 100 to 200. The gain of the 2SA1271 will be in the range from 100 to 320, for the 2SA1271-Y it will be in the range from 160 to 320.Sometimes the "2S" prefix is not marked on the package - the 2SA1271-O might only be marked "A1271-O".The complementary NPN transistor to the 2SA1271-O is the 2SC3203-O.The 2SA1036 (SOT-23), 2SA1036-P (SOT-23), 2SA1182 (SOT-23), 2SA1204 (SOT-89), 2SA1204-O (SOT-89), 2SA1588 (SOT-323), 2SA1621 (SOT-23), 2SA1621-O (SOT-23), FJX1182 (SOT-323), KSA1182 (SOT-23), KTA1298 (SOT-23), KTA1298-O (SOT-23), KTA1505 (SOT-23), KTA1505S (SOT-23), KTA1664 (SOT-89), KTA1664O (SOT-89), KTC8550S (SOT-23) and KTC8550S-C (SOT-23) is the SMD version of the 2SA1271-O transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.The KTA1271O is the TO-92 version of the 2SA1271-O.You can replace the 2SA1271-O with the 2N4951, 2N4952, 2N4954, 2SA1020, 2SA1150, 2SA1150-O, 2SA1273, 2SA1273-O, 2SA1283, 2SA1534A, 2SA684, 2SA928A, 2SA928A-O, 2SA950, 2SA950-O, 2SA966, 2SA966-O, 2SB1229, 2SB1229-R, 2SB740, 2SB740-B, 2SB764, 2SB764-E, 2SB892, 2SB892-R, 2SB985, 2SB985R, KSA928A, KSA928A-O, KTA1271, KTA1271O, KTA1272, KTA1272O, KTA1273, KTA1273O, KTA1281, KTA1282, KTA1282O, KTA708, KTA708-Y, KTB764, KTB764-Y, STB1277 or STB1277-O.