1. Introduction
This manual provides essential information for the proper installation, operation, and maintenance of your ZOOKOTO 150 Amp Automotive Manual Reset Circuit Breaker. This device is designed to protect electrical circuits in automotive, marine, RV, and other 12-42 Volt DC systems. It functions as an alternative to traditional fuse holders and fuses, offering a convenient manual reset feature.
Key features include:
- 150 Ampere current rating.
- Manual reset capability, also usable as a kill switch.
- Accepts 0, 2, 4, or 8 gauge power wire with included adapters.
- High-tech water-resistant housing with protective rubber bolt caps.
- Suitable for 12-42 Volt DC systems.
2. Product Overview
The ZOOKOTO 150 Amp Circuit Breaker is a compact and robust unit designed for high-current applications. It features clearly marked input and output terminals, a manual reset button, and a protective cover for the wire connections.

Figure 1: Angled view of the ZOOKOTO 150 Amp Circuit Breaker. This image displays the overall design, including the "IN" and "OUT" terminals, the red manual reset button, and the protective housing.

Figure 2: Top-down view of the circuit breaker. This perspective highlights the mounting points on either side, the "150 AMP" rating, and the black lever for manual operation.

Figure 3: Side view of the circuit breaker with the protective cover for the terminals opened. This reveals the internal terminal blocks designed to accept various wire gauges.

Figure 4: Top-down view of the circuit breaker with the terminal cover open, showing the screw terminals for wire connection. This view also clearly shows the "IN" and "OUT" markings.
3. Setup and Installation
Proper installation is crucial for the safe and effective operation of the circuit breaker. Always disconnect the power source before beginning installation.
- Mounting Location: Select a suitable location for mounting the circuit breaker. This can be a panel or firewall mount. Ensure the location is dry, protected from direct elements, and allows for easy access to the reset button. The high-tech water-resistant housing provides protection against splashes and dust, but direct submersion should be avoided.
- Secure Mounting: Use appropriate fasteners (not included) to securely mount the circuit breaker through its designated mounting holes.
- Wire Preparation: Prepare your power wires. The circuit breaker accepts 0, 2, 4, or 8 gauge wires. Strip approximately 1/2 inch of insulation from the ends of the wires.
- Connecting Wires:
- Open the protective housing cover to access the terminal blocks.
- Connect the incoming positive (+) power wire from your power source (e.g., battery) to the terminal marked "IN".
- Connect the outgoing positive (+) power wire to the component you wish to protect (e.g., amplifier, inverter) to the terminal marked "OUT".
- Ensure all wire connections are tight and secure to prevent loose connections, which can cause overheating or intermittent power.
- Close Cover: Close the protective housing cover and ensure the rubber bolt caps are properly seated over the terminals for enhanced protection.
- Initial Test: After installation, reconnect the main power source. The circuit breaker should be in the "ON" (reset) position. Verify that power is supplied to your connected components.
Important Safety Note: Always ensure correct polarity when connecting wires. Incorrect wiring can damage the circuit breaker and connected devices, and poses a fire hazard.
4. Operating Instructions
The ZOOKOTO circuit breaker is designed for simple operation and circuit protection.
- Normal Operation: In normal operating conditions, the circuit breaker's red button will be recessed, indicating the circuit is closed and power is flowing.
- Circuit Trip: If an overcurrent condition occurs (e.g., a short circuit or excessive load), the circuit breaker will automatically trip. When tripped, the red button will pop out, indicating an open circuit and no power flow.
- Manual Reset: To reset the circuit breaker after a trip, first identify and resolve the cause of the overcurrent. Once the issue is addressed, simply push the red button back in until it latches. This will restore power to the circuit.
- Manual Disconnect (Kill Switch Function): The circuit breaker can also be used as a manual disconnect switch. To intentionally cut power to the circuit, press the black lever (or the red button, depending on the specific design, refer to Figure 2 for the black lever). This will cause the red button to pop out, opening the circuit. To restore power, push the red button back in.
5. Maintenance
The ZOOKOTO circuit breaker requires minimal maintenance to ensure reliable performance.
- Regular Inspection: Periodically inspect the circuit breaker for any signs of physical damage, corrosion on terminals, or loose connections. Ensure the protective cover is intact and properly closed.
- Cleaning: If necessary, gently clean the exterior of the circuit breaker with a dry, soft cloth. Avoid using harsh chemicals or abrasive materials. Ensure no moisture enters the terminal area.
- Terminal Integrity: Check that the wire connections to the "IN" and "OUT" terminals remain tight. Loose connections can lead to resistance, heat buildup, and potential circuit failure.
- Environmental Protection: While the housing is water-resistant, prolonged exposure to extreme moisture, dirt, or corrosive environments should be minimized to extend the lifespan of the unit.
6. Troubleshooting
If you encounter issues with your circuit breaker, refer to the following troubleshooting guide:
| Problem | Possible Cause | Solution |
|---|---|---|
| Circuit breaker trips frequently. |
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| No power to connected device, but circuit breaker is not tripped (button is recessed). |
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| Circuit breaker will not reset (button will not stay in). |
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If troubleshooting steps do not resolve the issue, consult a qualified automotive electrician.
7. Specifications
| Feature | Detail |
|---|---|
| Brand | ZOOKOTO |
| Model Number | BR001HT-B-kuan150A |
| Current Rating | 150 Amps |
| Voltage Compatibility | 12-42 Volt DC |
| Wire Gauge Compatibility | 0, 2, 4, 8 Gauge (with included adapters) |
| Mounting Type | Panel / Wall Mount |
| Circuit Breaker Type | Standard, Manual Reset |
| Number of Poles | 3 (Note: The JSON states "Number Of Poles: 3", but the product images and description imply a single-pole device for the positive line. Users should verify their specific application needs.) |
| Product Dimensions (L x W x H) | 2.76 x 3.27 x 1.57 inches (70 x 83 x 40 mm) |
| Item Weight | 7.05 ounces (200 grams) |
| Housing | High-tech water-resistant with protective rubber bolt caps |
8. Warranty and Support
Specific warranty information for this ZOOKOTO product is not provided in the available documentation. For warranty claims or detailed technical support, please refer to the retailer or the official ZOOKOTO website where the product was purchased.
Always ensure that installation and troubleshooting are performed by individuals with appropriate electrical knowledge to prevent damage or injury.