🔌 Protect Your Build. Eliminate the Spark.

The Firduo 200A Anti-Spark Switch is a high-current aluminum PCB power switch engineered to eliminate the destructive electrical arc that occurs when connecting a high-voltage battery to an ESC or motor controller. Built on a 10×10 large-package MOSFET array with an aluminum substrate PCB for superior heat dissipation, this switch handles up to 200A continuous (1000A theoretical burst) at voltages up to 20S (90V) — making it suitable for electric skateboard, e-bike, scooter, eFoil, and high-power DIY builds.

The locking push-button design with integrated LED indicator provides clear on/off status at a glance. The aluminum base allows easy attachment of a larger heatsink for sustained high-current operation.

⚡ Key Features

• ✅ 200A Max Current / 80A Continuous — handles high-power builds with headroom for burst loads
• ✅ 1000A Theoretical Burst Current — MOSFET array rated for extreme instantaneous loads
• ✅ Up to 20S / 90V (Safe to 80V) — compatible with high-voltage LiPo and Li-ion battery packs
• ✅ 10×10 Large-Package MOSFET Array — superior overcurrent handling and thermal performance vs standard MOSFETs
• ✅ Aluminum Substrate PCB — excellent heat dissipation; heatsink-ready for sustained high-current use
• ✅ Anti-Spark Protection — eliminates battery connector arcing that burns contacts and damages ESC capacitors
• ✅ Locking Push-Button Control — press to lock ON (LED lights); press again to release OFF (LED off)
• ✅ 12mm LED Button — clear visual on/off indicator, easy to mount in enclosures
• ✅ Compact Form Factor: 68 × 34 × 9.5mm — fits in tight enclosures and custom battery boxes
• ✅ 10AWG Wire Pre-Installed — ready to connect to your battery and ESC

📋 Full Specifications

📦 What's in the Box

• 1× Firduo 200A Anti-Spark Switch (Aluminum PCB, V1.0)

⚠️Connectors not included.

🔗 Compatible Builds & Recommended Pairings

• Electric Skateboard / Longboard — protects ESC from battery connection arcing at 10S–12S
• E-Bike / E-Scooter — safe power switching for 48V–72V battery systems
• eFoil / Electric Surfboard — high-voltage (12S–16S) battery protection for marine builds
• DIY EV / Robotics / High-Power RC — any build requiring safe, arc-free battery connection
• Recommended ESC: Firduo FD75200 75V 200A Water-Cooled VESC — pair with this switch for safe eFoil power management
• Recommended Connector: Firduo 120A–250A Waterproof Power Connector — use on battery output side for sealed connections
• Wire Gauge: 10AWG pre-installed; upgrade to 8AWG for sustained 200A applications

🛠️ Setup Guide

1. Plan your wiring layout — the anti-spark switch installs between the battery (+, -) output terminal and the ESC (+, -) input terminal
2. Connect the input wire — solder or crimp the switch's input wire (from battery side) to your battery (+, -) output terminal. Use a connector rated for your maximum current (e.g., AS150, XT150, or Firduo 120A–250A waterproof connector).
3. Connect the output wire — connect the switch's output wire to your ESC (+, -) input terminal. Ensure all connections are insulated and secure before powering on.
4. Mount the switch — secure the aluminum PCB to your enclosure using the mounting holes. For sustained currents above 80A, attach a heatsink to the aluminum base using thermal silicone grease. Ensure adequate airflow around the switch.
5. Wire the LED button — route the 12mm LED button to an accessible position on your enclosure. The button is pre-wired to the PCB — no additional wiring required. Mount using the 12mm panel cutout.
6. Test the switch — with battery connected, press the button to lock ON (LED lights up). Verify ESC powers on. Press again to release OFF (LED off). Confirm ESC powers down. Check for any heat buildup after a short test run.
7. Add heatsink if needed — if running sustained currents above 80A, Please use thermal grease to secure the aluminum heatsink to the back of the switch. Ensure the heatsink is not short-circuited to any wiring on the switch.

❓ FAQ

Q1: What is an anti-spark switch and why do I need one?
When you connect a fully charged high-voltage battery to an ESC, the large capacitors inside the ESC charge instantly, creating a high-current electrical arc at the connector. This arc burns and oxidizes the connector contacts, can damage ESC capacitors, and in extreme cases can cause fires or explosions. An anti-spark switch uses MOSFETs to gradually ramp up the current, eliminating the arc entirely. It also gives you a safe, controlled way to power your build on and off without disconnecting the battery.

Q2: What's the difference between 80A continuous and 200A max?
80A continuous is the sustained current the switch can handle indefinitely without overheating (with adequate airflow). 200A max is the peak current it can handle for short bursts (e.g., during motor startup or hard acceleration). For sustained currents above 80A, attach a heatsink to the aluminum base using thermal silicone grease. The 1000A burst rating is a theoretical MOSFET specification for very short transient spikes only.

Q3: Is this switch waterproof? Can I use it in an eFoil build?
The switch itself is not waterproof — it must be installed inside a sealed, waterproof enclosure for eFoil or marine applications. The aluminum PCB is corrosion-resistant, but the electronics must be protected from water ingress. Use a waterproof project box or custom sealed enclosure, and seal all cable entry points with waterproof grommets or silicone sealant.

Q4: Do I need a heatsink, and how do I attach one?
For continuous currents up to 80A, no heatsink is required with adequate airflow. For sustained operation above 80A (up to 200A), a heatsink is strongly recommended. Apply a thin, even layer of thermal silicone grease to the back of the switch, then press the heatsink firmly against it. Secure with screws if the heatsink has mounting holes. Ensure the heatsink does not contact any PCB traces or components on the edges of the board.

Q5: Can I use this switch with any battery voltage and ESC?
Yes, as long as your battery voltage does not exceed 80V safe operating voltage (20S max). he switch is compatible with any ESC or motor controller — including VESC-based ESCs, hobby ESCs, and custom controllers. But always connect positive to positive and negative to negative. Do not exceed the voltage or current ratings to avoid MOSFET failure.