2SA1537-F Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -70 V
• Collector-Base Voltage, max: -80 V
• Emitter-Base Voltage, max: -3 V
• Collector Current − Continuous, max: -0.5 A
• Collector Dissipation: 10 W
• DC Current Gain (h_fe): 160 to 320
• Transition Frequency, min: 700 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-126F

Here is an image showing the pin diagram of this transistor.The 2SA1537-F transistor can have a current gain of 160 to 320. The gain of the 2SA1537 will be in the range from 40 to 320, for the 2SA1537-C it will be in the range from 40 to 80, for the 2SA1537-D it will be in the range from 60 to 120, for the 2SA1537-E it will be in the range from 100 to 200.Sometimes the "2S" prefix is not marked on the package - the 2SA1537-F might only be marked "A1537-F".The complementary NPN transistor to the 2SA1537-F is the 2SC3952-F.The FMMTA56 (SOT-23), KST56 (SOT-23), MMBTA56 (SOT-23), PMBTA56 (SOT-23), PZTA56 (SOT-223) and SMBTA56 (SOT-23) is the SMD version of the 2SA1537-F transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the 2SA1537-F with the 2SA1220, 2SA1220-P, 2SB1144, 2SB1167, 2SB1168, 2SB548, 2SB548-P, 2SB549, 2SB549-P, 2SB631, 2SB631-F, 2SB631K, 2SB631K-F, 2SB649, 2SB649-D, BD170, BD238, BD238G, BD380, BD380-25, KSA1220, KSA1220-Y, KTA1704, KTA1704-GR, MJE252, MJE254 or MJE712.