Transistor BC143 silicon PNP

Transistor BC143 PNP, 1A TO-39

Transistors

Reference: TRBC143

Part.No: BC143

€1.00

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The BC143 is a PNP silicon planar epitaxial transistor in a metal TO-39 package, originally designed as a driver-stage transistor for high-power audio amplifiers.

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Description
Product Details

BC143 PNP Driver Transistor - Classic TO-39 Audio Amplifier Driver

The BC143 is a PNP silicon planar epitaxial transistor housed in a metal TO-39 can, specifically engineered for the driver stage of high-power audio amplifiers. It combines a low saturation voltage with a high breakdown voltage, making it a popular choice in vintage and classic amplifier restoration projects where the original transistor is being sourced or replaced.

Functions & Applications

Audio Driver Design: Optimized specifically for driver stages in high-power audio amplifier circuits.
Metal TO-39 Package: Robust hermetic can construction, well suited to heatsinking for higher dissipation.
High Breakdown Voltage: Vcbo/Vceo of -60V gives good headroom in audio and switching designs.
Matched Pair Option: Can be supplied together with the BC144 as a gain-matched pair for balanced push-pull stages.

Technical Specifications

Parameter	Value / Specification
Transistor Type	BJT (Bipolar Junction Transistor)
Polarity / Channel	PNP
Package / Case	TO-39
Collector-Base Voltage (Vcbo)	-60V
Collector-Emitter Voltage (Vceo)	-60V
Max Collector Current (Ic)	-1A
Power Dissipation (Ptot, Tamb=25°C)	0.75W
Mounting Type	Through-Hole (THT), metal can

Frequently Asked Questions

Q: What is the BC143 typically used for?
A: It is designed for the driver stage of high-power audio amplifiers, handling collector currents up to 1A at up to 60V.

Q: Is there a matched or complementary counterpart to the BC143?
A: It can be supplied together with the BC144 as a gain-matched pair, and in classic amplifier designs it is commonly paired with the NPN BC142 in quasi-complementary driver configurations.

Notes

The BC143 is a legacy/vintage transistor (originally by SGS-Thomson/Philips-era manufacturers), often sourced today as New Old Stock (NOS) for repairing or restoring classic audio amplifiers.

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: PNP
Transistor Case Style: TO-39

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