2SA1142Q Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -180 V
• Collector-Base Voltage, max: -180 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -0.1 A
• Collector Dissipation: 10 W
• DC Current Gain (h_fe): 100 to 200
• Transition Frequency, min: 180 MHz
• Noise Figure, max: 4 dB
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-126

Here is an image showing the pin diagram of this transistor.The 2SA1142Q transistor can have a current gain of 100 to 200. The gain of the 2SA1142 will be in the range from 100 to 320, for the 2SA1142P it will be in the range from 160 to 320.Sometimes the "2S" prefix is not marked on the package - the 2SA1142Q might only be marked "A1142Q".The complementary NPN transistor to the 2SA1142Q is the 2SC2682Q.You can replace the 2SA1142Q with the 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, 2SA1540, 2SA1540-E, 2SA1541, 2SA1541-E, 2SA795A, 2SB1110, 2SB1110-C, KSA1142, KSA1142O, KSA1381, KSA1381-E, KSE350, MJE350 or MJE350G.