Power Transistor BD243 NPN, 6A TO-220

Power Transistor BD243 NPN, 6A TO-220

Transistors

Reference: TRBD243

Part.No: BD243

€1.20

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The BD243 is a high-current NPN Power Transistor in a TO-220 package, engineered for audio power amplifiers, voltage regulators, and motor control circuits. Renowned for reliability and thermal stability in demanding applications.

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Description
Product Details

BD243 Power Transistor - High Current NPN for Audio & Motor Control

The BD243 is a robust NPN power transistor widely used in audio amplifiers, voltage regulators and DC motor drivers. With its high current rating and proven performance in push-pull configurations alongside the complementary BD244, it delivers the power and reliability needed for demanding analog and switching applications.

Functions & Applications

High Current Capability: Up to 6A collector current, ideal for driving speakers, relays and DC motors.
Power Amplification: Perfect for complementary push-pull audio output stages with the BD244 PNP pair.
TO-220 Heatsink Mount: Integrated mounting tab for efficient heat dissipation via thermal compound or pads.
Voltage Regulator & Motor Control: Proven workhorse in switching and linear power supply circuits.

Technical Specifications

Parameter	Value / Specification
Transistor Type	BJT (Bipolar Junction Transistor)
Polarity / Channel	NPN
Package / Case	TO-220
Collector-Emitter Voltage (Vceo)	80V
Max Collector Current (Ic)	6A
Power Dissipation (Pd)	40W
Mounting Type	TO-220 with Heatsink Tab

Frequently Asked Questions

Q: Do I need thermal paste with the BD243?
A: Yes. Apply a thin layer of thermal compound or a silicone thermal pad between the transistor tab and heatsink to ensure efficient heat transfer and prevent thermal runaway.

Q: What is the complementary PNP partner for the BD243?
A: The BD244 is the complementary PNP transistor, designed to work in push-pull output stages for audio amplifiers and power supplies.

Notes

High-power transistor: always use an appropriate heatsink and thermal interface material. Verify mounting torque per datasheet to avoid mechanical damage.

Note: Price refers to one (1) piece. The component is shipped in bulk without individual packaging.

Transistor Type: BJT (Bipolar Junction Transistor)
Transistor Polarity / Channel: NPN
Transistor Case Style: TO-220

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