2SA814-O Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -100 V
• Collector-Base Voltage, max: -100 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -1 A
• Collector Dissipation: 15 W
• DC Current Gain (h_fe): 70 to 140
• Transition Frequency, min: 30 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-220

Here is an image showing the pin diagram of this transistor.The 2SA814-O transistor can have a current gain of 70 to 140. The gain of the 2SA814 will be in the range from 70 to 240, for the 2SA814-Y it will be in the range from 120 to 240.Sometimes the "2S" prefix is not marked on the package - the 2SA814-O might only be marked "A814-O".The complementary NPN transistor to the 2SA814-O is the 2SC1624-O.The 2SA1368 (SOT-89) is the SMD version of the 2SA814-O transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the 2SA814-O with the 2N6475, 2N6476, 2SA1006, 2SA1006A, 2SA1008, 2SA1010, 2SA1011, 2SA1077, 2SA1078, 2SA1304, 2SA1306, 2SA1306-O, 2SA1306A, 2SA1306A-O, 2SA1306B, 2SA1306B-O, 2SA1667, 2SA1668, 2SA1859, 2SA1859A, 2SA1964, 2SA740, 2SA815, 2SA815-O, 2SA913, 2SA913A, 2SA940, 2SA940A, 2SA968, 2SA968A, 2SA968AO, 2SA968B, 2SA968BO, 2SA968O, 2SA985, 2SA985A, 2SB1016, 2SB1016-O, 2SB1016A, 2SB1016A-O, 2SB1085, 2SB1085A, 2SB1090, 2SB1186A, 2SB1367, 2SB1367-O, 2SB546, 2SB546-O, 2SB546A, 2SB547, 2SB595, 2SB595-O, 2SB630, 2SB703A, 2SB861, 2SB940, 2SB940-Q, 2SB940A, 2SB940A-Q, 2SB995, 2SB995-O, BD240C, BD242C, BD244C, BD540C, BD544C, BD546C, BD712, BD744C, BD802, BD912, BD940, BD940F, BD942, BD942F, BD954, BD956, BDT30C, BDT86, BDT86F, BDT88, BDT88F, BDT96, BDT96F, KSA1010, KSA1304, KSA940, KSB546, KSB546-O, KTA1038, KTA1038-O, KTA1049, KTA1049O, KTA1659, KTA1659A, KTA1659AO, KTA1659O, KTA968, KTA968A, KTA968AO, KTA968O, KTB1367, KTB1367O, KTB1369, KTB1369O, MJE15029, MJE15029G, MJE15031, MJE15031G, MJF15031, MJF15031G or NTE292.