BD540 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -40 V
• Collector-Base Voltage, max: -40 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -5 A
• Collector Dissipation: 45 W
• DC Current Gain (h_fe): 40
• 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 BD540 is the BD539.The 2STF2340 (SOT-89), 2STF2550 (SOT-89), 2STN2540 (SOT-223), 2STN2550 (SOT-223) and BDP948 (SOT-223) is the SMD version of the BD540 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the BD540 with the 2N6040, 2N6040G, 2N6041, 2N6041G, 2N6666, 2N6667, 2N6667G, 2N6668, 2N6668G, 2SA1012, 2SA1012O, 2SA1012Y, 2SA1259, 2SA1279, 2SA1279-O, 2SA1279-Y, 2SA1289, 2SA1289-Q, 2SA1289-R, 2SA1289-S, 2SA1290, 2SA1290-Q, 2SA1290-R, 2SA1290-S, 2SA1291, 2SA1291-Q, 2SA1291-R, 2SA1291-S, 2SA1293, 2SA1293-O, 2SA1293-Y, 2SA1307, 2SA1307-O, 2SA1307-Y, 2SA1308, 2SA1308-O, 2SA1308-Y, 2SA1328, 2SA1328-O, 2SA1328-Y, 2SA1329, 2SA1329-O, 2SA1329-Y, 2SA1388, 2SA1388-O, 2SA1388-Y, 2SA1451, 2SA1451-O, 2SA1451-Y, 2SA1451A, 2SA1451A-O, 2SA1451A-Y, 2SA1452, 2SA1452-O, 2SA1452-Y, 2SA1452A, 2SA1452A-O, 2SA1452A-Y, 2SA1469, 2SA1469-Q, 2SA1469-R, 2SA1469-S, 2SA1470, 2SA1470-Q, 2SA1470-R, 2SA1470-S, 2SA1471, 2SA1471-Q, 2SA1471-R, 2SA1471-S, 2SA1725, 2SA1725-O, 2SA1725-P, 2SA1725-Y, 2SA1726, 2SA1726-O, 2SA1726-P, 2SA1726-Y, 2SA1742, 2SA1742-K, 2SA1742-L, 2SA1742-M, 2SA1743, 2SA1743-K, 2SA1743-L, 2SA1743-M, 2SA1744, 2SA1744-K, 2SA1744-L, 2SA1744-M, 2SA1931, 2SA770, 2SA771, 2SB1018, 2SB1018-O, 2SB1018-Y, 2SB1018A, 2SB1018A-O, 2SB1018A-Y, 2SB1019, 2SB1019-O, 2SB1019-Y, 2SB1097, 2SB1097-K, 2SB1097-L, 2SB1097-M, 2SB1134, 2SB1134-Q, 2SB1134-R, 2SB1134-S, 2SB1135, 2SB1135-Q, 2SB1135-R, 2SB1135-S, 2SB1136, 2SB1136-Q, 2SB1136-R, 2SB1136-S, 2SB1224, 2SB1225, 2SB553, 2SB553-O, 2SB553-Y, 2SB674, 2SB675, 2SB707, 2SB707-O, 2SB707-R, 2SB707-Y, 2SB708, 2SB708-O, 2SB708-R, 2SB708-Y, 2SB747, 2SB747-P, 2SB747-Q, 2SB747-R, 2SB824, 2SB824-Q, 2SB824-R, 2SB824-S, 2SB825, 2SB825-Q, 2SB825-R, 2SB825-S, 2SB826, 2SB826-Q, 2SB826-R, 2SB826-S, 2SB870, 2SB870-P, 2SB870-Q, 2SB870-R, 2SB881, 2SB882, 2SB945, 2SB945-P, 2SB945-Q, 2SB945-R, 2SB946, 2SB946-P, 2SB946-Q, 2SB946-R, 2SB947A, 2SB947A-P, 2SB947A-Q, 2SB947A-R, 2SB948A, 2SB948A-P, 2SB948A-Q, 2SB948A-R, 2SB951, 2SB951-P, 2SB951-Q, 2SB951A, 2SB951A-P, 2SB951A-Q, 2SB953A, 2SB953A-P, 2SB953A-Q, 2SB992, 2SB992-O, 2SB992-Y, 2SB993, 2SB993-O, 2SB993-Y, BD534, BD534K, BD536, BD536K, BD538, BD538K, BD540A, BD540B, BD544, BD544A, BD544B, BD546, BD546A, BD546B, BD644, BD646, BD648, BD896, BD896A, BD898, BD898A, BD900, BD900A, BD948, BD950, BD952, BDT62, BDT62A, BDT64, BDT64A, BDT82, BDT82F, BDT84, BDT84F, BDW24, BDW24A, BDW24B, BDW44, BDW45, BDW46, BDW46G, BDW64, BDW64A, BDW64B, BDW74, BDW74A, BDW74B, BDW94, BDW94A, BDW94B, BDX34, BDX34A, BDX34B, BDX34BG, BDX54, BDX54A, BDX54B, BDX54BG, D45H11, D45H11FP, D45H8, KSB1097, KSB1097-O, KSB1097-R, KSB1097-Y, KSB707, KSB707-O, KSB707-R, KSB707-Y, KSB708, KSB708-O, KSB708-R, KSB708-Y, TIP105, TIP105G, TIP106, TIP106G, TIP125, TIP125G, TIP126, TIP126G, TIP135, TIP135G, TIP136, TIP136G, TIP145T, TIP146T, TTA1452B or TTB1452B.