BD646 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -60 V
• Collector-Base Voltage, max: -80 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -8 A
• Collector Dissipation: 62.5 W
• DC Current Gain (h_fe): 750
• 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 BD646 is the BD645.You can replace the BD646 with the 2N6040, 2N6040G, 2N6041, 2N6041G, 2N6042, 2N6042G, 2N6667, 2N6667G, 2N6668, 2N6668G, 2SB1225, 2SB1228, 2SB882, 2SB886, 2SB951, 2SB951-P, 2SB951-Q, 2SB951A, 2SB951A-P, 2SB951A-Q, BD648, BD650, BD652, BD898, BD898A, BD900, BD900A, BD902, BDT62, BDT62A, BDT62B, BDT62C, BDT64, BDT64A, BDT64B, BDT64C, BDW45, BDW46, BDW46G, BDW47, BDW47G, BDW48, BDW74A, BDW74B, BDW74C, BDW74D, BDW94A, BDW94B, BDW94C, BDW94CF, BDX34A, BDX34B, BDX34BG, BDX34C, BDX34CG, BDX34D, BDX54A, BDX54B, BDX54BG, BDX54C, BDX54CG, MJF6668, MJF6668G, TIP105, TIP105G, TIP106, TIP106G, TIP107, TIP107G, TIP135, TIP135G, TIP136, TIP136G, TIP137, TIP137G, TIP145T, TIP146T or TIP147T.