TIP122 Darlington Transistor (100V, 5A)

Overview

The TIP122 is a robust NPN Darlington transistor designed for high-current switching applications. With a collector-emitter voltage rating of 100V and a continuous collector current of 5A, it delivers reliable performance for driving motors, solenoids, relays, and high-power LEDs. Its Darlington configuration provides high current gain, making it an ideal choice for interfacing low-power microcontroller outputs with high-power loads.

Key Features

• High Current Gain: Darlington pair ensures extremely high current amplification (hFE up to 1000), allowing low-current control signals to switch large loads.
• High Voltage Rating: 100V collector-emitter breakdown voltage handles a wide range of power applications.
• 5A Collector Current: Capable of continuous currents up to 5A, suitable for driving medium-power DC loads.
• TO-220 Package: Standard package with a metal tab for easy heatsinking, ensuring thermal stability in extended operations.
• Low Saturation Voltage: Optimized for efficient switching with minimal voltage drop.

Technical Specifications

• Transistor Type: NPN - Darlington
• Collector-Emitter Voltage (Vceo): 100V
• Collector Current (Ic): 5A (continuous)
• Power Dissipation (Pd): 2W (without heatsink)
• Package: TO-220
• DC Current Gain (hFE): 1000 (minimum) at Ic = 3A, Vce = 4V
• Saturation Voltage (Vce(sat)): 2.5V max at Ic = 3A, Ib = 12mA
• Transition Frequency (ft): 2MHz (typical)

Applications & Use Cases

• Motor Control: Drive DC motors and small robotics actuators.
• Relay Replacement: Switch inductive loads like relays and solenoids with microcontroller outputs.
• Power Switching: Control high-power LEDs, lamps, and heating elements.
• Audio Amplification: Output stage in low-power audio amplifiers.
• Power Supply Circuits: Voltage regulators and current limiting circuits.
• Educational Projects: Perfect for learning transistor switching and Darlington pair theory.

What's Included

• 1x TIP122 NPN Darlington Transistor (TO-220 package)

Compatibility

• Works seamlessly with Arduino, Raspberry Pi, ESP32, and other 3.3V/5V microcontrollers.
• Can be driven directly from GPIO pins (with base resistor) for loads up to 5A.
• Compatible with standard breadboards and PCBs for prototyping.

MOKWN Recommendation

For Egyptian makers and engineers, the TIP122 is a versatile and cost-effective solution for high-current switching. Whether you're building a robot, automating a home appliance, or experimenting with power electronics, this transistor offers the performance and reliability you need. We recommend adding a heatsink for continuous high-current applications to ensure optimal thermal performance. Order now and power up your next project with confidence!