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The C1815 is a general-purpose NPN bipolar junction transistor (BJT) designed primarily for low-power amplification and switching. Commonly used in audio frequency amplifiers and signal processing circuits, the C1815 offers low noise performance and high current gain, making it ideal for a wide variety of electronic projects, including DIY kits, Arduino modules, and analog circuits.
How It Works:
The C1815 operates by controlling a larger current flow between the collector and emitter with a smaller current at the base. In switching applications, it functions as an electronic on/off switch. In amplification mode, it boosts weak audio or signal inputs. This transistor is a great choice for interfacing with sensors, driving small loads, or building signal amplifier stages.
Specifications:
Type: NPN Bipolar Junction Transistor
Collector-Emitter Voltage (Vce): 50V
Collector Current (Ic): 150mA
Power Dissipation: 400mW
Transition Frequency: 80MHz
DC Current Gain (hFE): 70–700
Package: TO-92
Limitations:
Not designed for high current applications (Ic limited to 150mA).
Requires proper biasing with base resistors.
Thermal dissipation is limited due to small TO-92 package—avoid prolonged high-current usage without precaution.
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