Transistor 2SC509 NPN, 1A TO-39

Transistor 2SC509 NPN, 1A TO-39

Transistors

Reference: TR2SC509

Part.No: 2SC509

€1.40

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The 2SC509 is a classic NPN Bipolar Junction Transistor (BJT) in a TO-39 metal can package. A vintage workhorse for relay driving, switching, and amplification in vintage audio and industrial equipment repair.

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Description
Product Details

2SC509 NPN Transistor – Reliable Relay Driver & Vintage Amplifier

The 2SC509 is a robust NPN transistor housed in a durable metal can package, widely used in vintage audio amplifiers, relay control circuits, and industrial switching applications. Its moderate current rating and solid voltage handling make it a dependable choice for legacy equipment restoration.

Functions & Applications

Robust Metal Can Package: Excellent heat dissipation and mechanical durability for long-term reliability.
Relay & Load Driving: 1A maximum collector current handles relay coils, solenoids, and small motors effectively.
Vintage-Grade Design: Original technology proven in decades of audio, radio and industrial equipment.
Easy Integration: Through-hole leads compatible with vintage PCB layouts and breadboard experiments.

Technical Specifications

Parameter	Value / Specification
Transistor Type	BJT (Bipolar Junction Transistor)
Polarity / Channel	NPN
Package / Case	TO-39
Collector-Emitter Voltage (Vceo)	40V
Max Collector Current (Ic)	1A
Mounting Type	Through-Hole (THT)

Frequently Asked Questions

Q: Can the 2SC509 drive a relay coil?
A: Yes, the 1A rating is well-suited for typical relay coils (typically 200–500mA at 12V). Always include a flyback diode across the relay coil to protect the transistor from back-EMF spikes.

Q: Is the 2SC509 suitable for vintage audio amplifier repair?
A: Yes, it is a proven small-signal amplifier and driver stage in vintage audio and radio circuits. It maintains excellent stability and low noise in properly biased configurations.

Notes

Vintage stock: widely used in 1960s–1980s audio and industrial equipment. Excellent choice for authentic restoration projects.

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-39

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