BD734 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -25 V
• Collector-Base Voltage, max: -25 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -4 A
• Collector Dissipation: 40 W
• DC Current Gain (h_fe): 50
• 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 complementary NPN transistor to the BD734 is the BD733.The 2SB1121 (SOT-89), 2SB1121-R (SOT-89), 2SB1121-S (SOT-89), 2SB1121-T (SOT-89) and 2SB1121-U (SOT-89) is the SMD version of the BD734 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the BD734 with the 2N6666, 2SA1012, 2SA1012O, 2SA1012Y, 2SA1279, 2SA1279-O, 2SA1279-Y, 2SA1307, 2SA1307-O, 2SA1307-Y, 2SA1328, 2SA1328-O, 2SA1328-Y, 2SA1451, 2SA1451-O, 2SA1451-Y, 2SA1451A, 2SA1451A-O, 2SA1451A-Y, 2SA1931, 2SB1019, 2SB1019-O, 2SB1019-Y, 2SB1134, 2SB1134-Q, 2SB1134-R, 2SB1134-S, 2SB1135, 2SB1135-Q, 2SB1135-R, 2SB1135-S, 2SB1136, 2SB1136-Q, 2SB1136-R, 2SB1136-S, 2SB553, 2SB553-O, 2SB553-Y, 2SB565, 2SB565-B, 2SB565-C, 2SB566, 2SB566-B, 2SB566-C, 2SB824, 2SB824-Q, 2SB824-R, 2SB824-S, 2SB825, 2SB825-Q, 2SB825-R, 2SB825-S, 2SB826, 2SB826-Q, 2SB826-R, 2SB826-S, 2SB857, 2SB857-B, 2SB857-C, 2SB857-D, 2SB903, 2SB903-Q, 2SB903-R, 2SB903-S, 2SB919, 2SB919-Q, 2SB919-R, 2SB919-S, 2SB947A, 2SB947A-P, 2SB947A-Q, 2SB947A-R, 2SB948A, 2SB948A-P, 2SB948A-Q, 2SB948A-R, 2SB953A, 2SB953A-P, 2SB953A-Q, 2SB993, 2SB993-O, 2SB993-Y, BD544, BD546, BD644, BD896, BD896A, BD946, BD948, BDW24, BDW44, BDW54, BDW64, BDW74, BDW94, BDX34 or BDX54.