Transistor BD137 NPN, 60V, 1.5A, 12W, TO-126

Power Transistor BD137 NPN, 1.5A TO-126

Transistors

Reference: TRBD137

Part.No: BD137

€0.80

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The BD137 is an NPN power BJT transistor in a TO-126 package, rated for 60V and 1.5A. Commonly used in audio amplifier driver stages, voltage regulators and low-power switching circuits.

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Description
Product Details

BD137 Power Transistor - Reliable NPN Driver for Audio & Switching

The BD137 is an NPN power transistor housed in a TO-126 package, designed for driver-stage amplification and moderate-power switching applications. With a 60V collector-emitter rating and 1.5A continuous current handling, it's a popular choice for audio amplifier pre-driver stages and general-purpose power switching circuits.

Functions & Applications

60V Collector-Emitter Rating: Suitable for driving moderate-voltage audio and power stages.
1.5A Continuous Current: Handles enough current for driver-transistor and small load switching roles.
12W Power Dissipation: TO-126 package with tab allows heatsink mounting for sustained loads.
TO-126 Package: Compact through-hole footprint, easy to mount on PCBs with or without a heatsink.

Technical Specifications

Parameter	Value / Specification
Transistor Type	BJT (Bipolar Junction Transistor)
Polarity / Channel	NPN
Package / Case	TO-126
Collector-Emitter Voltage (Vceo)	60V
Max Collector Current (Ic)	1.5A
Power Dissipation (Pd)	12W
Mounting Type	Through-Hole (THT), heatsink tab

Frequently Asked Questions

Q: Does the BD137 need a heatsink?
A: For its full 12W dissipation rating or continuous high-current use, a heatsink attached to the TO-126 tab is recommended. Light-duty switching at lower currents can run without one.

Q: What is the complementary PNP part for BD137?
A: The complementary PNP transistor is the BD138.

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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