BD243C Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 100 V
• Collector-Base Voltage, max: 100 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 6 A
• Collector Dissipation: 65 W
• DC Current Gain (h_fe): 30
• 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 BD243C is the BD244C.The BDP953 (SOT-223) is the SMD version of the BD243C transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the BD243C with the 2N6045, 2N6045G, 2N6531, 2N6532, 2N6533, 2SC2334, 2SC2334K, 2SC2334L, 2SC2334M, 2SC2527, 2SC3834, 2SC4153, 2SD1196, 2SD1415, 2SD1415A, 2SD1830, 2SD2495, 2SD2495-O, 2SD2495-P, 2SD2495-Y, 2SD363, 2SD363-O, 2SD363-R, 2SD363-Y, 2SD633, 2SD866A, 2SD866A-P, 2SD866A-Q, 2SD866A-R, BD543C, BD545C, BD649, BD651, BD801, BD901, BDT63B, BDT63C, BDT65B, BDT65C, BDT85, BDT85F, BDT87, BDT87F, BDW23C, BDW42, BDW42G, BDW43, BDW63C, BDW63D, BDW73C, BDW73D, BDW93C, BDW93CF, BDX33C, BDX33CG, BDX33D, BDX53C, BDX53CG, BDX53D, BDX53E, BDX53F, KSC2334, KSC2334O, KSC2334R, KSC2334Y, KSD363, KSD363-O, KSD363-R, KSD363-Y, MJE15028, MJE15028G, MJE15030, MJE15030G, MJF15030, MJF15030G, MJF6388, MJF6388G, TIP102, TIP102G, TIP132, TIP132G, TIP142T or TTD1415B.