BD249 Bipolar Transistor

Characteristics of BD249 Transistor

Type: NPN
Collector-Emitter Voltage, max: 45 V
Collector-Base Voltage, max: 55 V
Emitter-Base Voltage, max: 5 V
Collector Current − Continuous, max: 25 A
Collector Dissipation: 125 W
DC Current Gain (h_fe): 25
Transition Frequency, min: 3 MHz
Operating and Storage Junction Temperature Range: -65 to +150 °C
Package: TO-3P

Pinout of BD249

Here is an image showing the pin diagram of this transistor.

Complementary PNP transistor

The complementary PNP transistor to the BD249 is the BD250.

Replacement and Equivalent for BD249 transistor

You can replace the BD249 with the BD249A or BD249B.

Equivalent

Same transistor is also available in:

TO-220 package, BD244: 65 watts
TO-220 package, BD244C: 65 watts
TO-3P package, BD245B: 80 watts
TO-3P package, BD246A: 80 watts
TO-3P package, BD250A: 125 watts

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