2SA814 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 240
• 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 transistor can have a current gain of 70 to 240. The gain of the 2SA814-O will be in the range from 70 to 140, 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 might only be marked "A814".The complementary NPN transistor to the 2SA814 is the 2SC1624.The 2SA1368 (SOT-89) is the SMD version of the 2SA814 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the 2SA814 with the 2SA1006, 2SA1006A, 2SA1078, 2SA1306, 2SA1306A, 2SA1306B, 2SA1667, 2SA1668, 2SA1859, 2SA1859A, 2SA815, 2SA913, 2SA913A, 2SA968, 2SA968A, 2SA968B, 2SA985, 2SA985A, 2SB1016, 2SB1016A, 2SB1085, 2SB1367, 2SB546, 2SB547, 2SB595, 2SB940, 2SB940A, 2SB995, BD240C, BD242C, BD244C, BD540C, BD544C, BD546C, BD802, BD940, BD940F, BD942, BD942F, BD954, BD956, BDT30C, BDT86, BDT86F, BDT88, BDT88F, KSB546, KTA1038, KTA1049, KTA1659, KTA1659A, KTA968, KTA968A, KTB1367, KTB1369, MJE15029, MJE15029G, MJE15031, MJE15031G, MJF15031 or MJF15031G.