BD947 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 45 V
• Collector-Base Voltage, max: 45 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 5 A
• Collector Dissipation: 40 W
• DC Current Gain (h_fe): 85 to 475
• Transition Frequency, min: 3 MHz
• 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 BD947 is the BD948.The BDP947 (SOT-223) is the SMD version of the BD947 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the BD947 with the 2SC1985, 2SC1986, 2SD1274, 2SD1274A, 2SD1274B, 2SD823, BD201, BD203, BD243, BD243A, BD243B, BD301, BD303, BD533, BD535, BD537, BD539A, BD539B, BD543A, BD543B, BD545A, BD545B, BD795, BD797, BD799, BD807, BD809, BD949, BD951, BDT81, BDT81F, BDT83, BDT83F, BDX77, D44H11, D44H11FP or D44H8.