2SA1144 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -150 V
• Collector-Base Voltage, max: -150 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -0.05 A
• Collector Dissipation: 10 W
• DC Current Gain (h_fe): 80 to 240
• Transition Frequency, min: 200 MHz
• 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 2SA1144 transistor can have a current gain of 80 to 240. The gain of the 2SA1144-O will be in the range from 80 to 160, for the 2SA1144-Y it will be in the range from 120 to 240.Sometimes the "2S" prefix is not marked on the package - the 2SA1144 might only be marked "A1144".The complementary NPN transistor to the 2SA1144 is the 2SC2704.The 2SA1200 (SOT-89) and KTA1660 (SOT-89) is the SMD version of the 2SA1144 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the 2SA1144 with the 2SA1021, 2SA1220A, 2SA1322, 2SA1352, 2SA1353, 2SA1360, 2SA1380, 2SA1381, 2SA1406, 2SA1407, 2SA1478, 2SA1479, 2SA1480, 2SA1540, 2SA1541, 2SA795, 2SA795A, 2SB1109, 2SB1110, HSB1109, KSA1220A, KSA1381, KSE350, KTA1700, MJE350 or MJE350G.