Introduction
The TIP135 is a PNP Darlington power transistor designed for use in high-current switching and amplification applications. Built in a TO-220 package, this device can handle collector currents up to 8A and voltages up to 60V, making it suitable for both industrial and consumer electronics. The Darlington configuration integrates two transistors internally, which provides an exceptionally high DC current gain (hFE ≥1000), allowing low input currents to control high load currents efficiently..
The TIP135 is commonly used in relay drivers, motor controllers, audio amplifier circuits, and power regulation systems. Its PNP polarity makes it ideal for high-side switching, where it can control the positive voltage supply to a load. Engineers often pair it with its NPN complementary transistor TIP132, forming a push-pull stage for balanced amplification or in H-bridge circuits for DC motor control.
TIP135 PNP Transistor
Thanks to its robust design, high current handling capability, and efficient thermal performance, the TIP135 is widely used in amplification, LED drivers, power supplies, and switching applications. The integrated base-emitter resistor also provides additional stability and protection against leakage currents, ensuring reliable operation.
TIP135 Pinout
TIP135 Transistor Key Features
- PNP Darlington transistor with very high gain.
- Handles up to 8A continuous collector current.
- Supports collector-emitter voltages up to 60V.
- Integrated base-emitter resistor for safe switching.
- Packaged in TO-220 for efficient heat dissipation.
- Ideal for both switching and linear applications.
Characteristics of TIP135 PNP Transistor
- Transistor Type: PNP Darlington
- Collector-Emitter Voltage (Vce): 60V
- Collector-Base Voltage (Vcb): 60V
- Emitter-Base Voltage (Veb): 5V
- Continuous Collector Current (Ic): 8A
- Peak Collector Current: 12A
- DC Current Gain (hFE): ≥1000
- Power Dissipation (Ptot): 80W
- Transition Frequency (fT): 4 MHz (typical)
- Operating Temperature Range: -65°C to +150°C
- Package Type: TO-220
TIP135 Pin Configuration
| Pin# | Pin Name | Pin Description |
|---|---|---|
| 1 | Base (B) | Input terminal that controls transistor conduction |
| 2 | Collector (C) | Main current-carrying terminal, connected to load |
| 3 | Emitter (E) | Output terminal, usually connected to ground/negative rail |
More Circuit Layouts
Key Applications of TIP135 PNP Transistor
- Audio amplifier output stages.
- Relay and solenoid drivers.
- DC motor and stepper motor controllers.
- High-power LED lighting drivers.
- Switching regulators and linear regulators.
- Push-pull amplifier and H-bridge circuits.
NPN Complimentary Transistor
TIP132 is the NPN complementary transistor of TIP135.
Together, they are used in push-pull stages, H-bridges, and high-power amplifier circuits.
Equivalent Transistors of TIP135
- TIP136 (PNP, 80V version)
- TIP137 (PNP, 100V version)
- BDW94 (PNP Darlington transistor alternative)
- MJ2955 (higher power PNP transistor)
(Pin configuration of some transistors mentioned above may different from TIP135).
Comparison of TIP135 vs TIP136 vs TIP137
- TIP135 is the lowest-voltage version (60V), making it best suited for low-voltage power amplifier stages, LED drivers, and motor controllers.
- TIP136 offers a medium range (80V), providing a balance between voltage handling and power applications.
- TIP137 is the highest voltage (100V) device in the series, designed for high-power audio amplifiers, industrial drivers, and high-side switching where more voltage margin is needed.
- All three have the same current rating (8A continuous, 12A peak) and high gain (≥1000), so the main difference lies in voltage handling capability which is 60V, 80V & 100V respectively.
Datasheet of TIP135 NPN Transistor
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