55A 21V Electric Chainsaw Lithium Controller Circuit Board

55A/21V Electric Chainsaw Lithium Controller Circuit Board

Upgrade or repair your cordless electric chainsaw with this high-performance 55A / 21V Lithium Chainsaw Controller Circuit Board. Designed as a universal replacement control board for electric chainsaws, this module delivers reliable motor drive performance and smooth speed control — keeping your tool running at its best.

Made in Mainland China.

Key Specifications

• Rated Current: 55A
• Voltage: 21V
• Material: Plastic + Metal (PCB construction)
• Compatibility: Universal Electric Chainsaw Tools
• Package Contents: 1 × Control Board

Features & Benefits

• High-Current Capacity: 55A rating handles the demands of rechargeable lithium-powered chainsaws with ease.
• Smooth Speed Control: Integrated speed-control switch for consistent, responsive motor management.
• Universal Fit: Suitable for a wide range of electric chainsaw and power tool models.
• Durable Construction: Robust plastic and metal components for long-lasting performance.
• Easy Replacement: Drop-in board design simplifies DIY repairs and maintenance.

Important Installation Instructions

To avoid damage to the board and ensure safe operation, please follow this sequence carefully:

1. Connect the wiring harness first.
2. Fix the motor securely in place.
3. Install the housing/case.
4. Tighten all screws firmly.
5. Confirm the square shaft of the head rotates freely without any jamming.
6. Connect the power supply.
7. Press the speed-control switch fully so there is no gap in the shell — failure to do so may trigger a buzzing alarm.

Note: Due to manufacturing batches, wiring color, base plate color, or minor cosmetic details may vary from product images. All variants are functionally identical. Screen color calibration may also cause slight color differences in photos.

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Learn more: OSHA guidance on hand and power tools

Frequently Asked Questions

Q: What voltage and current rating is this chainsaw controller circuit board?

A: This chainsaw controller circuit board is rated at 21V and 55A, making it suitable for lithium-battery-powered electric chainsaws operating within those electrical parameters.

Q: Is this control board compatible with my electric chainsaw?

A: This board is designed as a universal electric tool controller. It is compatible with most 21V lithium rechargeable electric chainsaws. Please verify your tool's voltage and current specifications before purchasing to ensure a proper match.

Q: Why does my chainsaw make a buzzing alarm after installing the board?

A: A buzzing alarm is typically caused by the speed-control switch not being fully pressed down, leaving a gap in the housing shell. Ensure the switch is fully engaged and there is no gap in the shell after installation to resolve the alarm.

Q: What is included in the package?

A: The package contains 1 × Chainsaw Controller Circuit Board. No additional wiring or hardware is included.

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.