BD543A Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 60 V
• Collector-Base Voltage, max: 60 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 PNP transistor to the BD543A is the BD544A.You can replace the BD543A with the 2N6043, 2N6043G, 2N6044, 2N6044G, 2N6045, 2N6045G, 2N6387, 2N6387G, 2N6388, 2N6388G, 2N6530, 2N6531, 2N6532, 2N6533, 2SC2527, 2SC3255, 2SC3255-Q, 2SC3255-R, 2SC3255-S, 2SC3346, 2SC3346-O, 2SC3346-Y, 2SC3710, 2SC3710-O, 2SC3710-Y, 2SC3710A, 2SC3710A-O, 2SC3710A-Y, 2SC3748, 2SC3748-Q, 2SC3748-R, 2SC3748-S, 2SC4551, 2SC4551-K, 2SC4551-L, 2SC4551-M, 2SC4552, 2SC4552-K, 2SC4552-L, 2SC4552-M, 2SD1192, 2SD1196, 2SD1277, 2SD1277-P, 2SD1277-Q, 2SD1277A, 2SD1277A-P, 2SD1277A-Q, 2SD1827, 2SD1830, BD543B, BD543C, BD545A, BD545B, BD545C, BD645, BD647, BD649, BD651, BD897, BD897A, BD899, BD899A, BD901, BDT63, BDT63A, BDT63B, BDT63C, BDT65, BDT65A, BDT65B, BDT65C, BDW40, BDW41, BDW41G, BDW42, BDW42G, BDW43, BDW73A, BDW73B, BDW73C, BDW73D, BDW93A, BDW93B, BDW93C, BDW93CF, BDX33A, BDX33B, BDX33BG, BDX33C, BDX33CG, BDX33D, BDX53A, BDX53B, BDX53BG, BDX53C, BDX53CG, BDX53D, D44H11, D44H11FP, D44H8, MJF6388, MJF6388G, TIP100, TIP100G, TIP101, TIP101G, TIP102, TIP102G, TIP130, TIP130G, TIP131, TIP131G, TIP132, TIP132G, TIP140T, TIP141T, TIP142T or TTC3710B.