21V 50A Brushless Electric Wrench Controller Board 600W PCB

$20.44 $26.43

21V 50A Brushless Electric Wrench Controller Board – 600W Speed Switch PCB

Upgrade or repair your cordless electric wrench with this high-performance 21V brushless controller board. Designed for lithium-powered tools, this compact PCB handles up to 50A input current and delivers a maximum output of 600W, making it a reliable replacement or DIY build component for brushless electric wrenches.

Key Specifications

Input Voltage: 21V
Input Current: 50A
Maximum Output Power: 600W
Torque Range: 500N–800N
Board Dimensions: 6 × 5 × 0.6 cm (2.36 × 1.97 × 0.24 in)
Material: Plastic + Metal (Aluminum Shell)
Power Source: Electric (Lithium Battery — not included)

Features

Brushless Motor Compatibility: Engineered specifically for brushless motor-driven wrenches for greater efficiency and longer tool lifespan.
Integrated Speed Control Switch: Built-in speed switch allows smooth variable control directly from the trigger mechanism.
Aluminum Shell Design: Helps dissipate heat during heavy-duty operation, protecting internal components.
Compact Form Factor: Easy to fit into standard electric wrench housings — ideal for repairs, replacements, and custom tool builds.
High Current Handling: 50A rating ensures stable performance even under heavy torque demands.

Important Installation Instructions

To protect the controller board and ensure safe operation, please follow these steps in order:

Connect all wires first.
Secure the motor in place.
Install the tool casing.
Tighten all screws firmly.
Verify that the square shaft of the head rotates freely without jamming.
Connect the power supply.
Press the speed control switch so there is no gap between the switch and the shell.

Note: Failure to follow these steps may result in a buzzing alarm or potential damage to the motherboard. Always ensure proper assembly before powering the tool.

Package Contents

1 × Electric Wrench Controller Board

Made in Mainland China.

Frequently Asked Questions

Q: Is this brushless controller board compatible with all 21V electric wrenches?

A: This 21V 50A brushless electric wrench controller board is designed for brushless motor-driven cordless wrenches operating at 21V. Always verify your tool's voltage, current rating, and motor type before installing. The compact 6 × 5 cm PCB fits most standard electric wrench housings.

Q: Does the controller board come with a battery or motor?

A: No — this package includes only the controller board (1 × PCB). The lithium battery, motor, and other wrench components are not included. It is intended as a replacement part or for custom DIY power tool builds.

Q: What happens if I don't follow the installation steps correctly?

A: Incorrect installation — such as connecting the power supply before securing the motor or leaving a gap under the speed switch — may trigger a buzzing alarm or cause permanent damage to the motherboard. Always follow the step-by-step assembly instructions provided to protect your investment.

Q: What is the maximum torque output this board can support?

A: This controller board supports a torque range of 500N to 800N, making it suitable for demanding fastening and loosening tasks typical of professional-grade electric wrenches.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.