2SA1540-E Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -200 V
• Collector-Base Voltage, max: -200 V
• Emitter-Base Voltage, max: -3 V
• Collector Current − Continuous, max: -0.1 A
• Collector Dissipation: 7 W
• DC Current Gain (h_fe): 100 to 200
• Transition Frequency, min: 300 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 2SA1540-E transistor can have a current gain of 100 to 200. The gain of the 2SA1540 will be in the range from 40 to 320, for the 2SA1540-C it will be in the range from 40 to 80, for the 2SA1540-D it will be in the range from 60 to 120, for the 2SA1540-F it will be in the range from 160 to 320.Sometimes the "2S" prefix is not marked on the package - the 2SA1540-E might only be marked "A1540-E".The complementary NPN transistor to the 2SA1540-E is the 2SC3955-E.The BF623 (SOT-89) and BF823 (SOT-23) is the SMD version of the 2SA1540-E transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the 2SA1540-E with the 2SA1156, 2SA1156K, 2SA1210, 2SA1210-R, 2SA1352, 2SA1352-E, 2SA1353, 2SA1353-E, 2SA1380, 2SA1380-E, 2SA1381, 2SA1381-E, 2SA1406, 2SA1406-E, 2SA1407, 2SA1407-E, 2SA1478, 2SA1478-E, 2SA1479, 2SA1479-E, 2SA1480, 2SA1480-E, 2SA1541, 2SA1541-E, 2SB1110, 2SB1110-C, KSA1156, KSA1156Y, KSA1381, KSA1381-E, KSE350, KTA1703, KTA1703-Y, MJE350 or MJE350G.