BD539 Bipolar Transistor

• Type: NPN
• 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 PNP transistor to the BD539 is the BD540.The 2STF1340 (SOT-89), 2STF1550 (SOT-89), 2STN1550 (SOT-223), BDP947 (SOT-223) and FZT690B (SOT-223) is the SMD version of the BD539 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the BD539 with the 2N6043, 2N6043G, 2N6044, 2N6044G, 2N6386, 2N6387, 2N6387G, 2N6388, 2N6388G, 2N6530, 2SC1985, 2SC1986, 2SC2315, 2SC2316, 2SC2562, 2SC2562O, 2SC2562Y, 2SC3145, 2SC3239, 2SC3239-O, 2SC3239-Y, 2SC3253, 2SC3253-Q, 2SC3253-R, 2SC3253-S, 2SC3254, 2SC3254-Q, 2SC3254-R, 2SC3254-S, 2SC3255, 2SC3255-Q, 2SC3255-R, 2SC3255-S, 2SC3258, 2SC3258-O, 2SC3258-Y, 2SC3299, 2SC3299-O, 2SC3299-Y, 2SC3308, 2SC3308-O, 2SC3308-Y, 2SC3345, 2SC3345-O, 2SC3345-Y, 2SC3346, 2SC3346-O, 2SC3346-Y, 2SC3540, 2SC3540-O, 2SC3540-Y, 2SC3709, 2SC3709-O, 2SC3709-Y, 2SC3709A, 2SC3709A-O, 2SC3709A-Y, 2SC3710, 2SC3710-O, 2SC3710-Y, 2SC3710A, 2SC3710A-O, 2SC3710A-Y, 2SC3746, 2SC3746-Q, 2SC3746-R, 2SC3746-S, 2SC3747, 2SC3747-Q, 2SC3747-R, 2SC3747-S, 2SC3748, 2SC3748-Q, 2SC3748-R, 2SC3748-S, 2SC4511, 2SC4511-O, 2SC4511-P, 2SC4511-Y, 2SC4512, 2SC4512-O, 2SC4512-P, 2SC4512-Y, 2SC4550, 2SC4550-K, 2SC4550-L, 2SC4550-M, 2SC4551, 2SC4551-K, 2SC4551-L, 2SC4551-M, 2SC4552, 2SC4552-K, 2SC4552-L, 2SC4552-M, 2SC4881, 2SD1060, 2SD1060-Q, 2SD1060-R, 2SD1060-S, 2SD1061, 2SD1061-Q, 2SD1061-R, 2SD1061-S, 2SD1062, 2SD1062-Q, 2SD1062-R, 2SD1062-S, 2SD1158, 2SD1191, 2SD1192, 2SD1270, 2SD1270-P, 2SD1270-Q, 2SD1270-R, 2SD1271, 2SD1271-P, 2SD1271-Q, 2SD1271-R, 2SD1277, 2SD1277-P, 2SD1277-Q, 2SD1277A, 2SD1277A-P, 2SD1277A-Q, 2SD1362, 2SD1362-O, 2SD1362-Y, 2SD1363, 2SD1363-O, 2SD1363-Y, 2SD1411, 2SD1411-O, 2SD1411-Y, 2SD1411A, 2SD1411A-O, 2SD1411A-Y, 2SD1412, 2SD1412-O, 2SD1412-Y, 2SD1444A, 2SD1444A-P, 2SD1444A-Q, 2SD1444A-R, 2SD1445A, 2SD1445A-P, 2SD1445A-Q, 2SD1588, 2SD1588-K, 2SD1588-L, 2SD1588-M, 2SD1667, 2SD1667-Q, 2SD1667-R, 2SD1667-S, 2SD1668, 2SD1668-Q, 2SD1668-R, 2SD1668-S, 2SD1669, 2SD1669-Q, 2SD1669-R, 2SD1669-S, 2SD1826, 2SD1827, 2SD362-O, 2SD362-R, 2SD553, 2SD553-O, 2SD553-Y, 2SD568, 2SD568-K, 2SD568-L, 2SD568-M, 2SD569, 2SD569-K, 2SD569-L, 2SD569-M, 2SD634, 2SD635, 2SD812, 2SD812-P, 2SD812-Q, 2SD812-R, 2SD866, 2SD866-P, 2SD866-Q, 2SD866-R, BD533, BD533K, BD535, BD535K, BD537, BD537K, BD539A, BD539B, BD543, BD543A, BD543B, BD545, BD545A, BD545B, BD643, BD645, BD647, BD895, BD895A, BD897, BD897A, BD899, BD899A, BD947, BD949, BD951, BDT63, BDT63A, BDT65, BDT65A, BDT81, BDT81F, BDT83, BDT83F, BDW23, BDW23A, BDW23B, BDW39, BDW40, BDW41, BDW41G, BDW63, BDW63A, BDW63B, BDW73, BDW73A, BDW73B, BDW93, BDW93A, BDW93B, BDX33, BDX33A, BDX33B, BDX33BG, BDX53, BDX53A, BDX53B, BDX53BG, D44H11, D44H11FP, D44H8, KSD1588, KSD1588-O, KSD1588-R, KSD1588-Y, KSD362-O, KSD362-R, KSD568, KSD568-O, KSD568-R, KSD568-Y, KSD569, KSD569-O, KSD569-R, KSD569-Y, TIP100, TIP100G, TIP101, TIP101G, TIP120, TIP120G, TIP121, TIP121G, TIP130, TIP130G, TIP131, TIP131G, TIP140T, TIP141T or TTC3710B.