TIP121 Darlington Transistor (80V, 5A)

Overview

The TIP121 Darlington Transistor is a high-gain NPN Darlington pair in a robust TO-220 package, designed for high-current switching and amplification applications. With a collector-emitter voltage rating of 80V and a continuous collector current of 5A, this transistor provides excellent performance for driving inductive loads like motors, solenoids, and relays, as well as high-brightness LEDs. Its high current gain (hFE) means it can be directly controlled by low-current signals from microcontrollers, making it a staple in embedded systems and robotics projects.

Key Features

• High Current Gain (hFE): Darlington configuration delivers extremely high current gain, allowing low-current logic signals to switch large loads.
• High Voltage & Current Ratings: 80V collector-emitter breakdown voltage and 5A continuous collector current.
• Power Dissipation: Capable of handling up to 2W of power, suitable for moderate power applications.
• TO-220 Package: Industry-standard package with excellent thermal performance, easy to mount on heatsinks.
• NPN Darlington Pair: Simplifies circuit design by reducing the required base drive current.

Technical Specifications

• Transistor Type: NPN - Darlington
• Collector-Emitter Voltage (VCEO): 80V
• Collector Current (IC): 5A (max)
• Power Dissipation (PD): 2W
• Package / Case: TO-220

Applications & Use Cases

• Motor Control: Drive DC motors and stepper motors in robotics and automation projects.
• LED Drivers: Switch high-power LEDs and LED strips.
• Relay and Solenoid Drivers: Actuate relays and solenoids in industrial and home automation.
• Power Switching: Replace mechanical switches in low-frequency power switching applications.
• Amplification: Use in audio and signal amplification circuits where high gain is required.

What's Included

• 1x TIP121 Darlington Transistor (TO-220 package)

Compatibility

• Compatible with Arduino, Raspberry Pi, ESP32, and other microcontrollers (when used with appropriate base resistor).
• Can be used with most 5V and 3.3V logic levels.
• Drop-in replacement for TIP120, TIP121, and TIP122 series in most applications.

MOKWN Recommendation

For Egyptian makers and electronics enthusiasts, the TIP121 is an essential component for any project involving high-current loads. Whether you're building a robot, an LED matrix, or an automated system, this transistor provides reliable switching with minimal components. We recommend pairing it with a flyback diode when driving inductive loads to protect your circuit. Order now and get same-day shipping in Cairo and fast delivery across Egypt!