2SA1037 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -50 V
• Collector-Base Voltage, max: -60 V
• Emitter-Base Voltage, max: -6 V
• Collector Current − Continuous, max: -0.15 A
• Collector Dissipation: 0.2 W
• DC Current Gain (h_fe): 120 to 560
• Transition Frequency, min: 140 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: SOT-23

Here is an image showing the pin diagram of this transistor.The 2SA1037 transistor can have a current gain of 120 to 560. The gain of the 2SA1037-Q will be in the range from 120 to 270, for the 2SA1037-R it will be in the range from 180 to 390, for the 2SA1037-S it will be in the range from 270 to 560.Sometimes the "2S" prefix is not marked on the package - the 2SA1037 might only be marked "A1037".The complementary NPN transistor to the 2SA1037 is the 2SC2412.You can replace the 2SA1037 with the 2SA1518, 2SA1519, 2SA1520, 2SA1521, FMMTA55, FMMTA56, KST55, KST56, MMBTA55, MMBTA56, PMBTA56, SMBTA55 or SMBTA56.