Introduction
This manual provides essential information for the safe and effective installation, operation, and maintenance of your Spurtar ABT-312 Battery Disconnect Switch. This high-current switch is designed to safely isolate the battery in 12V, 24V, or 36V electrical systems, preventing unwanted power drain and enhancing security. Please read this manual thoroughly before use and retain it for future reference.
Product Contents
Verify that all items listed below are included in your package. If any parts are missing or damaged, please contact customer support.
- 1x Switch Body
- 1x Lockout Bracket
- 1x Handle
- 1x Lock & Key Set
- 1x Faceplate
- 1x Fixing Nut
- 1x Spring Washer
- 2x Heat Shrink Tubes
- 2x Insulation Sleeves
- 2x 3/8 inch Copper Lugs
- 2x Fixing Pins

Specifications
| Operation Mode | ON-OFF |
| Rated Current | 500 Amps (Continuous) |
| Momentary Current | 5000 Amps |
| Operating Voltage | 12V-36V |
| Contact Type | b-contact |
| Connector Type | Clamp |
| Switch Type | Kill Switch |
| Terminal Type | Screw |
| Material | Aluminum |
| Product Dimensions (LxWxH) | 9 x 6 x 16 cm |
| Circuit Type | 2-way |
| Mounting Type | Wall Mount |
| Number of Positions | 2 |
| Upper Temperature Rating | 85°C |
| Color | Silver |
| Contact Material | Copper |
| Waterproof Rating | IP40 |
| Model Number | ABT3120LK-WIFBEU |


Safety Information
WARNING: Improper installation or use of this product can result in serious injury, death, or property damage. Always follow these safety guidelines:
- Always disconnect the battery's negative terminal first before working on any electrical system.
- Wear appropriate personal protective equipment (PPE), including safety glasses and insulated gloves.
- Ensure the vehicle or equipment is turned off and cannot be accidentally started during installation.
- Avoid contact with live electrical components.
- Do not exceed the rated voltage and current of the switch.
- Keep children and unauthorized personnel away from the installation area.
- Consult a qualified electrician or mechanic if you are unsure about any part of the installation process.
Installation
Assembly Steps
Follow these steps to assemble the battery disconnect switch components:
- Attach the handle to the switch body.
- Secure the handle with the fixing nut.
- Place the spring washer.
- Install the faceplate, ensuring the ON/OFF markings align correctly.
- Mount the lockout bracket to the desired location using appropriate fasteners (not included).
- Insert the switch body into the lockout bracket and secure it.

Wiring Diagrams
The Spurtar ABT-312 switch can be integrated into various electrical systems. Below are common wiring configurations:
- Simple Setup: Connect the switch in series with the positive battery cable to the load.
- Dual Battery Setup: Use two switches to manage two separate batteries, allowing isolation of each.
- Single ON/OFF Switch: Integrate the switch to control power to a specific device or the entire system.

Important: Ensure all connections are tight and properly insulated using the provided heat shrink tubes and insulation sleeves to prevent short circuits and corrosion. Always connect the switch to the positive terminal of the battery or the main positive cable of the electrical system.

Operating Instructions
The Spurtar ABT-312 Battery Disconnect Switch is designed for simple ON/OFF operation.
- To turn ON: Rotate the handle clockwise to the "ON" position. This connects the battery to the electrical system.
- To turn OFF: Rotate the handle counter-clockwise to the "OFF" position. This disconnects the battery from the electrical system.
- Lockout Feature: When the switch is in the "OFF" position, the handle can be removed, and the included lock and key can be used to secure the switch, preventing unauthorized reconnection of power.
Video 1: Battery Isolator Switch Operation. This video demonstrates the basic ON/OFF functionality of a battery isolator switch, similar to the Spurtar ABT-312.
Video 2: Marine Battery Kill Switch. This video illustrates the application of a battery kill switch in a marine environment, showcasing its use for power management on boats.
Video 3: Battery Disconnect Switch Product Image. A visual overview of a battery disconnect switch, highlighting its features and appearance.
Maintenance
Regular maintenance ensures optimal performance and longevity of your battery disconnect switch.
- Inspect Connections: Periodically check all electrical connections for tightness and corrosion. Loose connections can cause resistance, heat buildup, and potential failure.
- Clean Terminals: If corrosion is present, disconnect the battery and clean the terminals with a wire brush and a baking soda solution. Rinse with clean water and dry thoroughly.
- Check for Damage: Inspect the switch body, handle, and wiring for any signs of physical damage, cracks, or wear. Replace damaged components immediately.
- Lubrication: The internal mechanism is generally maintenance-free. Avoid applying lubricants unless specifically recommended by the manufacturer.
Troubleshooting
If you encounter issues with your Spurtar ABT-312 Battery Disconnect Switch, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No power to electrical system when switch is ON. | Loose connections, corroded terminals, faulty wiring, discharged battery. | Check all connections for tightness. Clean corroded terminals. Inspect wiring for damage. Check battery charge level. |
| Switch feels stiff or difficult to turn. | Dirt or debris in the mechanism, internal wear. | Ensure the switch is clean. If the issue persists, the switch may need replacement. |
| Switch gets hot during operation. | Loose connections, excessive current draw, undersized wiring. | Check and tighten all connections. Verify that the current draw does not exceed the switch's rating. Ensure wiring gauge is appropriate for the application. |
Warranty and Support
Spurtar products are manufactured to high-quality standards. For specific warranty information or technical support, please refer to the product packaging or contact Spurtar customer service directly. Keep your purchase receipt as proof of purchase.
