BD544 PNP Power Transistor (TO-220 Package, 40V, 8A)

The BD544 is identified as a PNP power bipolar junction transistor intended for power switching, amplification, and driver applications. Its TO-220 through-hole package supports PCB mounting and heatsink installation in electronic assemblies. The supplied ratings of 40V, 8A, and 70W describe the intended electrical capabilities, but the exact specifications should be confirmed against the manufacturer's datasheet before circuit design or replacement.

Key Features -

• PNP power bipolar junction transistor

• TO-220 through-hole package

• Supplied voltage rating of 40V

• Supplied current rating of 8A

• Supplied power dissipation rating of 70W

• Suitable for compatible power switching and amplification circuits

• Supports heatsink installation where required

Specifications -

• Product Type: Bipolar Junction Transistor (BJT)

• Part Number: BD544

• Transistor Polarity: PNP, as provided

• Transistor Type: Power Transistor

• Package Type: TO-220, as provided

• Mounting Type: Through Hole

• Number of Pins: 3

• Voltage Rating: 40V, as provided; voltage parameter to be confirmed

• Current Rating: 8A, as provided; operating conditions to be confirmed

• Power Dissipation (Pd): 70W, as provided; actual allowable dissipation depends on thermal conditions

• DC Current Gain (hFE): Verify according to the manufacturer's datasheet

• Pin Configuration: Verify the manufacturer's datasheet before installation

Applications -

• Power switching circuits

• Power amplifier stages

• Driver circuits for power devices

• Electronic power control systems

• Industrial electronic equipment

• Electronic repair and prototyping projects