C1815 Transistor Pinout, Equivalent, uses and Features.

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The transistor C1815 is a general-purpose BJT transistor. It is very popular transistor in electronic because of it variety of functions and features. Here in this article, we will discuss in detail the transistor pins, uses, features, and how to use them on a circuit.

C1815 transistor pinout

C1815 Transistor Descriptions.

The C1815 transistor is an NPN bipolar junction transistor (BJT) family. This transistor is widely used in amplifier circuits and signal-processing applications due to its versatility and reliability.

The C1815 transistor is housed in a compact TO-92 package, making it easy to integrate into electronic designs. It features three terminals: the collector, base, and emitter. The collector current flows from the collector to the emitter, controlled by the base current.

One notable characteristic of the C1815 transistor is its high current gain, which makes it suitable for amplifying weak signals. This transistor also operates effectively at low voltages, making it energy-efficient.

Features and technical specifications of C1815 transistor.

The technical features of this transistor is shown on the table below;

package typeTO-92
Transistor typeNPN
Max. Collector Current (Ic)150mA
Max. Collector-Emitter Voltage (Vce)150m
Max.Collector Base Voltage (Vcb)60V
Max. Emitter-Base Voltage( Veb)5V
Max. Collector dissipation(Pc)400miliwatts
Max. Transition Frequency(fT)80mhz
Mini. & max. DC Gain70-700
Storage & Operational Temperature-55 to +150 Centigrade.
Features of C1815 NPN transistor.

PNP Complementary of C1815 Transistor.

The PNP complementary transistor for C1815 is A1015.

Replacement / Equivalent of C1815.

The equivalent transistor for C1815 is 2N2222, 2N3904, 2SC3198.

Note: The pinout of some of those transistor replacements differs and that is why is important to check out the pinout before replacing. You can still test the transistor using multimeter


  • Switching loads under 150mA.
  • They are used as a pre-amplifier on a circuit.
  • Used in building sensor circuit.
  • Audio Amplifier stage.
  • They are used in RF circuits.

How to safely long-run C1815 in a circuit.

To safely run the transistor for a long time, with the best performance, always Operate the transistor under max. collector-emitter voltage. Do not drive load above 150mA using this transistor. Use a suitable base resistor to provide the required base current to the transistor. Avoid operating the transistor on a temperature below -55 centigrade and above +150 centigrade.

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