TIP142 NPN Transistor Pinout Datasheet

Introduction

The TIP142 is a high-power NPN Darlington transistor used in power amplification and high-current switching applications. It belongs to the TIP140–TIP147 transistor family and is specially designed for circuits where high current gain and voltage handling are required. With a collector-emitter voltage rating of 100V and the ability to handle 10A continuous collector current (15A peak), the TIP142 is ideal for use in motor drivers, inverters, UPS systems, and industrial control circuits.

Encased in a TO-218 package, the TIP142 is capable of dissipating high power when mounted on a heatsink, ensuring reliable thermal performance. Its Darlington pair configuration provides an exceptionally high current gain (up to 1000), making it a preferred choice in circuits requiring low input current to control heavy loads. This feature allows designers to directly interface it with microcontrollers, sensors, or low-power driver circuits.

TIP142 NPN Transistor

Because of its high voltage and current ratings, the TIP142 is especially popular in audio amplifier output stages, switching power supplies, and industrial automation systems. It pairs with its PNP complementary transistor, TIP147, enabling designers to implement push-pull amplifier stages for improved efficiency and performance.

TIP142 Pinout

TIP142 Transistor Key Features

• Very high current gain (hFE up to 1000) using Darlington technology.
• High collector-emitter voltage rating of 100V, suitable for demanding power circuits.
• Handles 10A continuous current and 15A peak current.
• Available in TO-218 package for efficient power dissipation.
• Direct compatibility with low-power driver circuits and microcontrollers.

Specifications/Characteristics of TIP142 NPN Transistor

• Transistor Type: NPN (Darlington)
• Collector-Emitter Voltage (Vce): 100V
• Collector-Base Voltage (Vcb): 100V
• Emitter-Base Voltage (Veb): 5V
• Collector Current (Ic): 10A continuous, 15A peak
• DC Current Gain (hFE): Up to 1000
• Power Dissipation (Ptot): 125W (with heatsink)
• Package Type: TO-218

TIP142 Pin Configuration

More Circuit Layouts

Key Applications of TIP142 NPN Transistor

• High-power audio amplifier circuits
• Industrial motor drivers
• Switching regulators and power supplies
• Relay and solenoid drivers
• Inverter and UPS circuits
• Control systems for automation

PNP Complimentary Transistor

TIP147 is the PNP complementary transistor of TIP142.

Equivalent Transistors of TIP142

• TIP140 (80V, NPN Darlington)
• TIP141 (80V, NPN Darlington, slightly lower rating)
• MJ11015 (High-power NPN Darlington)
• 2N6284 (NPN Darlington Power Transistor)
• TIP120 / TIP121 / TIP122 (for medium-power applications)

(Pin configuration of some transistors mentioned above may different from TIP142).

TIP140 vs TIP141 vs TIP142 Comparison

TIP140, TIP141, TIP142 are all NPN Darlington transistors in the same family.

The main difference is their voltage rating:

• TIP140 → 60V
• TIP141 → 80V
• TIP142 → 100V

Current handling and package TO-218 are the same, so the choice depends mainly on the required voltage tolerance in your circuit.

Datasheet of TIP142 NPN Transistor

Click the following Button below to download the datasheet of TIP142 Transistor :

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