C9015 PNP Small Signal Transistor Datasheet

Introduction

The C9015 transistor is a PNP small-signal bipolar junction transistor (BJT) used for low-frequency amplification and general-purpose switching applications. It is commonly found in audio amplifier stages, radio frequency circuits, and analog signal processing sections of electronic devices. The transistor comes in a TO-92 plastic package, making it ideal for use in compact electronic circuits and low-power devices.

This transistor offers a collector current (Ic) of up to −150 mA and a collector-emitter voltage (Vce) of −50 V, which makes it suitable for various low-voltage DC circuits. Because of its high DC current gain (hFE) and low noise characteristics, it is frequently used in signal amplification, driver stages, and small-load switching tasks. The C9015 provides stable operation and reliable performance even in environments where consistent amplification is critical.

C9015 PNP Small Signal Transistor

In many cases, the C9015 transistor is used in audio preamplifiers, signal conditioners, and intermediate amplifier stages. Its excellent frequency response and compact packaging make it a popular choice among circuit designers, hobbyists, and professionals alike. It is the PNP complement of C9014 (NPN) and can also be interchanged with other similar PNP signal transistors in compatible circuits.

C9015 Pinout

Pin Configuration

Key Features

• PNP small-signal BJT for general-purpose low-power circuits
• Low noise figure ideal for audio preamplifiers
• High current gain ensuring good amplification performance
• Compact TO-92 package suitable for dense PCB layouts
• Stable performance under variable temperature conditions
• Compatible with low voltage and small current switching operations

Characteristics

• Transistor Type: PNP
• Collector–Emitter Voltage (Vce): −50 V
• Collector–Base Voltage (Vcb): −60 V
• Emitter–Base Voltage (Veb): −5 V
• Collector Current (Ic): −150 mA
• DC Current Gain (hFE): 120 to 400 (typical)
• Transition Frequency (fT): 100 MHz (typical)
• Power Dissipation (Ptot): 400 mW (at 25°C)
• Package: TO-92 plastic package
• Junction Temperature (Tj): 150°C (maximum)

Comparison Summary: 9015, 2SC9015, S9015, KTC9015

• The 9015, 2SC9015, S9015, and KTC9015 transistors are all part of the same C9015 transistor family, sharing identical electrical characteristics and performance parameters. The main differences lie in manufacturer naming conventions, regional standards, and marking styles, not in their internal structure or function.
• The 9015 is the most commonly used designation, widely recognized in generic and Chinese-made electronic components. The prefix “2SC” in 2SC9015 follows the Japanese Industrial Standard (JIS) system, where “2S” represents a silicon transistor and “C” denotes an NPN or PNP low-power type (depending on context). However, in this specific case, 2SC9015 refers to the same PNP device as C9015, just under Japanese notation.
• The S9015 version is often seen on compact transistor packages where shorter labeling is preferred due to space limitations on the component body. Meanwhile, KTC9015 is the Korean-manufactured variant produced by KEC (Korea Electronics Co.), offering the same electrical specifications and quality assurance.
• In practice, all four — 9015, 2SC9015, S9015, and KTC9015 — are electrically equivalent and interchangeable in circuits designed for small-signal PNP transistors, especially in audio amplifiers, signal switching, and general-purpose amplification applications.

More Circuit Layouts

Key Applications of C9015 Transistor

• Audio preamplifiers and signal amplifiers
• Analog signal conditioning circuits
• Low-power driver and switching circuits
• Sensor interface and low-noise amplifying stages
• General purpose hobby and DIY electronics projects

NPN Complementary Transistor

• The NPN complementary transistor of C9015 is C9014.
  Both are part of the same transistor family and are often used in push-pull amplifier circuits or complementary output stages where a matching NPN–PNP pair is required.

Equivalent of C9015 PNP Small Signal Transistor

• 2N2907
• 2N4403
• A1015
• S8550
• KTC9015
• BC557 / BC558 (for low-voltage circuits)

These equivalents can be used as replacements depending on the circuit’s voltage and current requirements.

(Pin configuration of some transistors mentioned above may different from C9015).

Datasheet of C9015 PNP Small Signal Transistor

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