C1815 Transistor NPN 50V 150mA 200mW Audio Frequency Amplifier TO-92

C1815 Transistor is a general-purpose NPN transistor (BJT) used mainly for low-noise audio amplification and switching applications. It offers good gain characteristics, compact TO-92 package, and compatibility with various low-power circuits. Suitable for hobbyist and commercial applications.

Key Features:

• Low Noise Amplification: Designed for audio frequency amplification with minimal distortion.
• High Voltage Handling: Can tolerate collector-emitter voltages up to 50V.
• Moderate Collector Current: Supports up to 150mA, ideal for signal amplification or small loads.
• Compact TO-92 Package: Easy to mount and ideal for compact PCB layouts.
• Wide Usage: Common in radios, audio equipment, and low-power switching circuits.

Technical Specifications:

• Transistor Type: NPN
• Collector-Emitter Voltage (V_CEO): 50V
• Collector Current (I_C): 150mA (maximum)
• Power Dissipation (P_D): 200mW
• DC Current Gain (h_FE): 70 to 700
• Transition Frequency (f_T): 80MHz
• Package: TO-92 through-hole

Mechanical Specifications:

• Package Type: TO-92
• Pin Configuration: Pin 1 (Emitter), Pin 2 (Collector), Pin 3 (Base)
• Lead Pitch: 2.54mm standard
• Material: Plastic-encapsulated body

Mounting Options:

• Through-Hole Mount: Ideal for breadboard prototyping and soldered PCBs.
• Socket-Compatible: Can be inserted into TO-92-compatible IC sockets.

Schematic Diagram, Connection, Wiring and Pinout:

• Connection: Base drives the transistor, emitter is grounded or connected to reference, collector to the load.
• Polarity: NPN (requires positive base voltage to conduct).
• Wiring: Confirm correct pinout before inserting into a circuit (E-C-B from flat face view).

Datasheet and Documentation:

• Download C1815 Transistor Datasheet (PDF)

Applications:

• Audio Amplifiers: Commonly used in preamplifier and small signal amplifier stages.
• Switching Circuits: Operates as a low-current switch in digital or analog circuits.
• Oscillator Circuits: Used in RF and tone generation circuits.
• Sensor Interfaces: Amplifies small sensor signals for processing.
• Signal Inversion: Functions as inverter in logic circuits when configured properly.

Equivalent Models:

• 2N3904: Popular general-purpose NPN transistor
• BC547: Low noise NPN transistor for audio and switching
• S8050: Similar voltage and current handling
• 2SC945: Direct alternative with similar specs

Package Includes:

• 1 x C1815 Transistor NPN 50V 150mA 200mW Audio Frequency Amplifier TO-92