2SA1144-O 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 160
• 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-O transistor can have a current gain of 80 to 160. The gain of the 2SA1144 will be in the range from 80 to 240, 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-O might only be marked "A1144-O".The complementary NPN transistor to the 2SA1144-O is the 2SC2704-O.The 2SA1200 (SOT-89), 2SA1200-O (SOT-89) and KTA1660 (SOT-89) is the SMD version of the 2SA1144-O transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the 2SA1144-O with the 2SA1021, 2SA1220A, 2SA1322, 2SA1352, 2SA1353, 2SA1360, 2SA1360-O, 2SA1380, 2SA1381, 2SA1406, 2SA1407, 2SA1408, 2SA1478, 2SA1479, 2SA1480, 2SA1540, 2SA1541, 2SA795, 2SA795A, 2SB1109, 2SB1110, 2SB648A, 2SB649A, HSB1109, KSA1220A, KSA1381, KSE350, KTA1700, MJE350 or MJE350G.