BD544B Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -80 V
• Collector-Base Voltage, max: -80 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -8 A
• Collector Dissipation: 70 W
• DC Current Gain (h_fe): 60
• Operating and Storage Junction Temperature Range: -65 to +150 °C
• Package: TO-220

Here is an image showing the pin diagram of this transistor.The complementary NPN transistor to the BD544B is the BD543B.You can replace the BD544B with the 2N6041, 2N6041G, 2N6042, 2N6042G, 2N6668, 2N6668G, 2SA1077, 2SA1329, 2SA1329-O, 2SA1329-Y, 2SA1452, 2SA1452-O, 2SA1452-Y, 2SA1452A, 2SA1452A-O, 2SA1452A-Y, 2SB1228, 2SB886, 2SB951A, 2SB951A-P, 2SB951A-Q, BD544C, BD546B, BD546C, BD648, BD650, BD652, BD900, BD900A, BD902, BDT62A, BDT62B, BDT62C, BDT64A, BDT64B, BDT64C, BDW46, BDW46G, BDW47, BDW47G, BDW48, BDW74B, BDW74C, BDW74D, BDW94B, BDW94C, BDW94CF, BDX34B, BDX34BG, BDX34C, BDX34CG, BDX34D, BDX54B, BDX54BG, BDX54C, BDX54CG, BDX54D, BDX54E, BDX54F, D45H11, D45H11FP, MJF6668, MJF6668G, TIP106, TIP106G, TIP107, TIP107G, TIP136, TIP136G, TIP137, TIP137G, TIP146T, TIP147T, TTA1452B or TTB1452B.