BD879 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 80 V
• Collector-Base Voltage, max: 100 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 1 A
• Collector Dissipation: 9 W
• DC Current Gain (h_fe): 2000
• Transition Frequency, min: 200 MHz
• Operating and Storage Junction Temperature Range: -65 to +150 °C
• Package: TO-126

Here is an image showing the pin diagram of this transistor.The complementary PNP transistor to the BD879 is the BD880.You can replace the BD879 with the 2SD1509, 2SD1692, 2SD1692-K, 2SD1692-L, 2SD1692-M, 2SD986, 2SD986-K, 2SD986-L, 2SD986-M, KSB986, KSB986-O, KSB986-R, KSB986-Y, KSD1692, KSD1692-G, KSD1692-O or KSD1692-Y.