Transistor BD237 NPN, 80V, 2A, 25W, TO-126

Power Transistor BD237 NPN, 2A TO-126

Transistors

Reference: TRBD237

Part.No: BD237

€1.20

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The BD237 is an NPN power BJT in a TO-126 package, rated for 80V and 2A. Commonly used in audio amplifier output stages, power switching and driver circuits requiring moderate current handling.

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Description
Product Details

BD237 Power Transistor - Reliable NPN Switching & Amplification

The BD237 is an NPN power transistor in a TO-126 package, rated for 80V, 2A and 25W, widely used in audio output stages, DC motor drivers and general-purpose power switching circuits. Its TO-126 case allows direct mounting to a small heatsink for improved thermal performance under load.

Functions & Applications

80V / 2A Rating: Suitable for moderate-power switching and amplification tasks beyond small-signal transistors.
25W Power Dissipation: Handles sustained loads when mounted with an adequate heatsink.
TO-126 Package: Compact power package with an integrated mounting hole for easy heatsink attachment.
Audio & Driver Applications: A classic choice for push-pull output stages and relay/motor driver circuits.

Technical Specifications

Parameter	Value / Specification
Transistor Type	BJT (Bipolar Junction Transistor)
Polarity / Channel	NPN
Package / Case	TO-126
Collector-Emitter Voltage (Vceo)	80V
Max Collector Current (Ic)	2A
Power Dissipation (Pd)	25W
Mounting Type	Through-Hole (THT)

Frequently Asked Questions

Q: What is the complementary PNP part for BD237?
A: The complementary PNP transistor is the BD238, matched for the same voltage and current ratings.

Q: Does the BD237 need a heatsink?
A: For its full 25W power dissipation rating, a heatsink is required; at lower currents and short duty cycles it can run without one, but a small clip-on heatsink is recommended for sustained loads.

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-126

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