S9015 PNP Transistor – 45V 100mA TO-92
The S9015 PNP Transistor is a general-purpose bipolar junction transistor (BJT) designed for low-power switching, small-signal amplification, and electronic control applications.
Featuring a collector-emitter voltage rating of -45V, a maximum collector current of 100mA, and a maximum power dissipation of 450mW, the S9015 is suitable for audio preamplifiers, signal-processing circuits, and low-current electronic switching applications.
Its compact TO-92 through-hole package makes it ideal for PCB assembly, breadboard prototyping, Arduino projects, and DIY electronics.
Key Features
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PNP Bipolar Transistor: Suitable for switching and signal amplification.
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-45V Collector-Emitter Rating: Designed for low-voltage electronic circuits.
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100mA Collector Current: Suitable for low-current switching applications.
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450mW Power Dissipation: Supports low-power circuit designs under appropriate thermal conditions.
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High DC Current Gain: Suitable for small-signal amplification.
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Compact TO-92 Package: Easy to integrate into electronic circuits.
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Through-Hole Mounting: Suitable for PCB assembly and prototyping.
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General-Purpose Design: Useful for audio amplifiers, transistor drivers, and signal-processing circuits.
Technical Specifications
| Parameter |
Specification |
| Model |
S9015 |
| Transistor Type |
PNP Bipolar Junction Transistor |
| Package |
TO-92 |
| Mounting Type |
Through-Hole |
| Collector-Emitter Voltage (VCEO) |
-45V |
| Collector Current (IC) |
100mA maximum |
| Maximum Power Dissipation (PD) |
450mW |
| Collector Cut-Off Current (ICBO) |
50nA (specified test conditions) |
| DC Current Gain (hFE) |
300 at IC = 1mA, VCE = -5V (listed value) |
| Transition Frequency (fT) |
100MHz (listed value) |
| Number of Terminals |
3 |
Pin Configuration
The S9015 transistor has three terminals:
| Pin |
Name |
Function |
| 1 |
Emitter (E) |
Typically connected toward the positive supply |
| 2 |
Base (B) |
Controls transistor conduction |
| 3 |
Collector (C) |
Connects to the load or amplifier circuit |
Important: The pin arrangement follows the supplied product illustration. Verify the physical pinout against the datasheet of the actual transistor before installation.
Connection Example – Arduino
The S9015 can be used as a PNP transistor for controlling small electronic loads.
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Emitter: Connect to the positive supply.
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Base: Connect to a suitable control circuit through a current-limiting resistor.
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Collector: Connect to the positive terminal of the load.
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Load Negative: Connect to GND.
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Common Ground: Connect the control circuit and external power supply grounds together when appropriate.
Note: For high-side switching, the base voltage must be controlled relative to the emitter voltage. A microcontroller GPIO pin should not be connected directly when the supply voltage exceeds its permitted GPIO voltage range. Use a suitable driver stage if required.
Applications
- Audio Preamplifier Circuits
- Small-Signal Amplification
- High-Side Switching Circuits
- Arduino and Microcontroller Projects
- LED Switching Circuits
- Signal Processing Circuits
- Transistor Driver Stages
- Low-Power Electronic Devices
- DIY Electronics and Prototyping
- Educational Electronics Projects
Important Notes
-
The S9015 is a PNP transistor, not an NPN transistor.
- The transistor generally turns on when its base voltage is sufficiently lower than its emitter voltage.
- Use a suitable base resistor to limit current.
- Do not exceed the maximum collector current, voltage, or power dissipation ratings.
- A flyback diode is required when switching inductive loads.
- Current gain and frequency characteristics depend on operating conditions and manufacturer.
- Verify the transistor pinout before installation.
Package Includes
