C9014 NPN Small Signal Transistor Datasheet

Introduction

The C9014 transistor is a low-noise, high-gain NPN small signal transistor widely used in audio amplification, signal processing, and high-frequency switching applications. It is part of the popular C901x transistor series, which includes devices like C9012, C9013, and C9015, commonly found in various consumer electronics, radio circuits, and audio equipment. The C9014 offers a collector current of 150 mA and a maximum collector-emitter voltage of 45V, making it suitable for small to medium signal processing in low-power electronic designs.

Due to its excellent high-frequency response (up to 100 MHz) and low noise figure, the C9014 transistor is frequently used in audio preamplifier stages, RF circuits, and signal detection systems. Its moderate current gain (hFE between 120 and 600) ensures stable amplification performance across a range of frequencies, while its TO-92 package allows for easy mounting on PCB layouts for compact and efficient circuit designs.

C9014 NPN Small Signal Transistor

The C9014 is preferred by circuit designers and DIY electronics enthusiasts for general-purpose amplification and switching applications, including oscillators, small motor drivers, and digital logic interfaces. Its affordability, widespread availability, and compatibility with other NPN transistors make it an essential component in both analog and digital circuit design.

C9014 Pinout

Pin Configuration

Key Features

• NPN silicon transistor with high current gain
• Low noise and high-frequency response (up to 100 MHz)
• Ideal for signal and audio amplification stages
• Stable and efficient switching performance
• Compact TO-92 plastic package for easy installation
• Reliable and cost-effective for general-purpose electronics

Characteristics

• Transistor Type: NPN
• Package Type: TO-92
• Collector-Emitter Voltage (Vceo): 45V
• Collector-Base Voltage (Vcbo): 50V
• Emitter-Base Voltage (Vebo): 5V
• Collector Current (Ic): 150 mA
• DC Current Gain (hFE): 120 to 600
• Transition Frequency (fT): 100 MHz
• Power Dissipation (Ptot): 400 mW
• Junction Temperature (Tj max): 150°C
• Polarity: NPN

Comparison : 9014, 2SC9014, S9014, KTN9014

The 9014, 2SC9014, S9014, and KTN9014 transistors all belong to the same family of NPN silicon small-signal transistors and are electrically identical in most cases. The 2SC9014 follows the Japanese Industrial Standard (JIS) naming format, where “2S” signifies a silicon-based device, and “C” indicates NPN polarity. The S9014 is a commonly used short-marked variant, often found in Chinese and Taiwanese-manufactured transistors with compact labeling for the TO-92 case. The KTN9014 is the Korean-manufactured version (by KEC or Samsung) of the same transistor, offering consistent quality and thermal stability.

In practical use, all four versions 9014, 2SC9014, S9014, and KTN9014 are functionally interchangeable and can be used in the same circuits without modification. They perform equally well in audio, RF, and general-purpose switching applications, offering high gain, low noise, and reliability across a wide operating frequency range.

More Circuit Layouts

Key Applications of C9014 Transistor

• Audio frequency preamplifier and driver circuits
• Signal amplification and detection
• Switching circuits for low-current loads
• RF and IF stages in radio equipment
• Oscillator and waveform generation circuits
• DIY electronic projects and educational experiments

PNP Complementary Transistor

• The PNP complementary transistor of the C9014 is the C9015. These two devices are often paired in push-pull amplifier circuits and complementary output stages, ensuring symmetrical operation and distortion-free audio performance.

Equivalent of C9014 NPN Small Signal Transistor

• 2N3904
• BC547
• S8050
• 2SC945
• 2SC1815
• KTC9014 (Korean variant)
• MPS2222A

(Pin configuration of some transistors mentioned above may different from C9014).

Datasheet of C9014 NPN Small Signal Transistor

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