Power Transistor BD809 NPN, 12A TO-220

Power Transistor BD809 NPN, 12A TO-220

Transistors

Reference: TRBD809

Part.No: BD809

€1.75

In Stock

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The BD809 is a high-linearity NPN Power BJT in a TO-220 package, designed specifically for audio amplifier output stages. Ideal for push-pull configurations paired with the complementary BD810 PNP transistor.

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Description
Product Details

BD809 Power Transistor - Audio-Grade NPN for Output Stages

The BD809 is a robust NPN power transistor engineered for high-linearity audio amplification. Optimized for output stage applications, it delivers clean signal reproduction with minimal distortion, making it the preferred choice for professional and hobbyist audio designs requiring push-pull topologies.

Functions & Applications

High Linearity: Delivers clean, distortion-free audio output even at high signal levels.
Complementary Pair Ready: Designed to work seamlessly with BD810 PNP for push-pull amplifier stages.
Substantial Current Capacity: Up to 12A collector current, suitable for driving speaker loads.
Thermal Management: TO-220 package includes a mounting tab for efficient heat dissipation and reliability.

Technical Specifications

Parameter	Value / Specification
Transistor Type	BJT (Bipolar Junction Transistor)
Polarity / Channel	NPN
Package / Case	TO-220
Max Collector Current (Ic)	12A
Mounting Type	Through-Hole (THT) with heatsink tab

Frequently Asked Questions

Q: What is the complementary PNP transistor for the BD809?
A: The BD810 is the direct complementary PNP counterpart, designed for matched push-pull audio output stages.

Q: Can the BD809 be used without a heatsink?
A: For low-power audio circuits or brief operation, a heatsink may not be essential. However, for sustained high-current applications (above 5A) or high ambient temperatures, mounting on an aluminum heatsink is strongly recommended to prevent thermal runaway.

Notes

Audio-grade power transistor optimized for high-linearity output stages. Ensure adequate heatsinking for sustained operation above 5A to prevent thermal degradation.

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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