Overview
The A1015 is a high-quality PNP bipolar junction transistor (BJT) housed in the industry-standard TO-92 package. It is specifically engineered for high-frequency amplification and general-purpose switching. Because of its excellent linearity and low noise figure, it is a favorite for building DIY audio gear, radio receivers, and signal processing modules.
Key Features
Low Noise & High Linearity: Specifically designed for audio-frequency (AF) amplification with minimal distortion.
High Voltage Rating: Can handle a collector-emitter voltage up to $50V$, making it more resilient than some standard signal transistors.
Standard PNP Logic: Ideal for high-side switching and complementary push-pull designs.
Compact TO-92 Form Factor: Fits easily into breadboards and tight PCB layouts.
Complementary Pair: Works perfectly with the C1815 (NPN version) for balanced circuit designs.
Technical Specifications
| Feature | Specification |
| Transistor Type | PNP |
| Package | TO-92 |
| Collector-Emitter Voltage ($V_{CEO}$) | $50V$ |
| Collector Current ($I_C$) | $150mA$ |
| Power Dissipation ($P_D$) | $400mW$ |
| DC Current Gain ($h_{FE}$) | 70 to 400 |
| Transition Frequency ($f_T$) | $80MHz$ |
Ideal Applications
Audio Preamplifiers: Boosting low-level signals from microphones or guitar pickups.
Signal Switching: Controlling small components in battery-powered devices.
LED Indicators: Driving status LEDs in high-side configurations.
University Labs: Teaching students the difference between NPN and PNP biasing.
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