2SA771 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -80 V
• Collector-Base Voltage, max: -80 V
• Emitter-Base Voltage, max: -6 V
• Collector Current − Continuous, max: -6 A
• Collector Dissipation: 40 W
• DC Current Gain (h_fe): 40
• Transition Frequency, min: 10 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.Sometimes the "2S" prefix is not marked on the package - the 2SA771 might only be marked "A771".The complementary NPN transistor to the 2SA771 is the 2SC1986.The BDP952 (SOT-223) is the SMD version of the 2SA771 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the 2SA771 with the 2N6041, 2N6041G, 2N6042, 2N6042G, 2N6668, 2N6668G, 2SA1010, 2SA1010K, 2SA1010L, 2SA1010M, 2SA1077, 2SA1329, 2SA1329-O, 2SA1329-Y, 2SA1452, 2SA1452-O, 2SA1452-Y, 2SA1452A, 2SA1452A-O, 2SA1452A-Y, 2SA1725, 2SA1725-O, 2SA1725-P, 2SA1725-Y, 2SA1726, 2SA1726-O, 2SA1726-P, 2SA1726-Y, 2SB1018, 2SB1018-O, 2SB1018-Y, 2SB1018A, 2SB1018A-O, 2SB1018A-Y, 2SB1020, 2SB1020A, 2SB1228, 2SB1626, 2SB1626-O, 2SB1626-P, 2SB1626-Y, 2SB633, 2SB633-C, 2SB633-D, 2SB633-E, 2SB633-F, 2SB673, 2SB674, 2SB708, 2SB708-O, 2SB708-R, 2SB708-Y, 2SB870, 2SB870-P, 2SB870-Q, 2SB870-R, 2SB886, 2SB946, 2SB946-P, 2SB946-Q, 2SB946-R, 2SB951A, 2SB951A-P, 2SB951A-Q, 2SB992, 2SB992-O, 2SB992-Y, BD538, BD538K, BD544B, BD544C, BD546B, BD546C, BD648, BD650, BD652, BD900, BD900A, BD902, BDT62A, BDT62B, BDT62C, BDT64A, BDT64B, BDT64C, BDT84, BDT84F, BDT86, BDT86F, BDT88, BDT88F, BDW24B, BDW24C, BDW46, BDW46G, BDW47, BDW47G, BDW48, BDW64B, BDW64C, BDW64D, BDW74B, BDW74C, BDW74D, BDW94B, BDW94C, BDW94CF, BDX34B, BDX34BG, BDX34C, BDX34CG, BDX34D, BDX54B, BDX54BG, BDX54C, BDX54CG, BDX54D, BDX54E, BDX54F, D45H11, D45H11FP, KSA1010, KSA1010O, KSA1010R, KSA1010Y, KSB708, KSB708-O, KSB708-R, KSB708-Y, MJE15029, MJE15029G, MJE15031, MJE15031G, MJF15031, MJF15031G, MJF6668, MJF6668G, TIP106, TIP106G, TIP107, TIP107G, TIP136, TIP136G, TIP137, TIP137G, TIP146T, TIP147T, TTA1452B, TTB1020B or TTB1452B.