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NPN Transistor – C1815 (2SC1815)

🛠️ Silicon NPN Transistor – C1815 (2SC1815)

Overview

The C1815 (also known as 2SC1815) is a versatile silicon NPN transistor in a TO‑92 package, perfect for amplification and switching applications. Capable of handling up to 150 mA and 50 V, it’s a fundamental component for hobby electronics, audio amplifiers, and low-power switching circuits.

Key Features

  • NPN bipolar transistor in TO‑92 package

  • Maximum collector current: 150 mA

  • Collector-emitter voltage rating: 50 V

  • Low noise and suitable for audio frequency amplification

  • High current gain (): typically 70–700 depending on variant

  • Transition frequency up to 80 MHz

Pinout (When flat face forward, leads downward):

  1. Emitter (left)

  2. Collector (middle)

  3. Base (right) 


  • Audio preamplifiers and amplifiers

  • General purpose logic-level switching

  • Push-pull amplifier stages

  • LED blinkers, chasers, and flasher circuits

  • Oscillators and signal generators

✅ Resources

2.00 LE 2.00 LE

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Transistor npn Transistor