Power Transistor 2SC1173 NPN, 3A TO-220

Power Transistor 2SC1173 NPN, 3A TO-220

Transistors

Reference: TR2SC1173

Part.No: 2SC1173

€1.59

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The 2SC1173 is a reliable NPN power transistor in a TO-220 package, optimized for low-frequency audio amplification and relay driving applications. Its robust design and easy heatsink mounting make it ideal for continuous-duty power stages.

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Description
Product Details

2SC1173 Power Transistor – Audio Amplifiers & Relay Drivers

The 2SC1173 is a classic NPN power transistor designed for low-frequency audio power applications and switching circuits requiring moderate current handling. With its TO-220 package and proven reliability, it remains a popular choice for amplifier output stages and relay driver circuits.

Functions & Applications

Power Handling: Supports continuous collector currents up to 3A, ideal for audio amplifier output stages.
Easy Heatsinking: TO-220 package allows direct mounting to external heatsinks for reliable thermal management.
Low-Frequency Audio Optimized: Proven performance in classic audio amplifier designs and low-frequency power applications.
Relay & Switching Capable: Sufficient current capability to directly drive medium-power relays and inductive loads.

Technical Specifications

Parameter	Value / Specification
Transistor Type	BJT (Bipolar Junction Transistor)
Polarity / Channel	NPN
Package / Case	TO-220
Max Collector Current (Ic)	3A
Package Type	TO-220 (Heatsinkable)
Mounting Type	Through-Hole (THT), Heatsink-Compatible

Frequently Asked Questions

Q: Is a heatsink required for the 2SC1173?
A: Yes, for continuous operation near 3A, a suitable heatsink is highly recommended to ensure reliable thermal management and prevent junction temperature rise.

Q: Can the 2SC1173 drive a 12V relay?
A: Yes, the 2SC1173 can reliably drive 12V relays with coil currents under 3A. Always use a flyback protection diode across the relay coil to protect the transistor from inductive voltage spikes.

Notes

Requires adequate heatsinking for continuous high-current operation. Verify application-specific thermal design requirements.

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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