BD537K Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 80 V
• Collector-Base Voltage, max: 80 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 8 A
• Collector Dissipation: 50 W
• DC Current Gain (h_fe): 40 to 100
• 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 BD537K transistor can have a current gain of 40 to 100. The gain of the BD537 will be in the range from 40 to 0, for the BD537J it will be in the range from 30 to 75.The complementary PNP transistor to the BD537K is the BD538K.You can replace the BD537K with the 2N6488, 2N6488G, BD709, BD711, BD743B, BD743C, BD799, BD801, BD809, BD909, BD911, BDT83, BDT83F, BDT85, BDT85F, BDT87, BDT87F, BDT93, BDT93F, BDT95, BDT95F, BDX77, MJE15028, MJE15028G, MJE15030, MJE15030G, MJF15030, MJF15030G, MJF3055 or MJF3055G.