150A 12V/24V/48V Automatic over-current DC circuit breaker / switch
150A 12V/24V/48V Automatic over-current DC circuit breaker / switch
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150A Automatic Over-Current DC Circuit Breaker / Switch
Resettable Fuse & Isolator | 12V/24V/48V Systems | IP67 Rated
The Photonic Universe 150A DC Circuit Breaker (SKU: CB150) is a robust over-current protection device designed for 12V, 24V, and 48V DC electrical systems. This versatile unit combines the essential functions of a resettable 150A fuse and a manual On/Off switch, providing both automatic circuit protection and convenient isolation for various DC applications.
Engineered to safeguard your system from over-current events such as high power draw, short-circuits, or equipment faults, this thermal circuit breaker eliminates the need for fuse replacements. Its manual-break option allows for simple disconnection and reconnection of the circuit, making it an ideal choice for solar, automotive, and marine setups.
VERSATILE PROTECTION: Functions as both a resettable 150A fuse and a manual On/Off isolator switch for DC systems.
Key Features
| ▶ Dual Functionality — Combines over-current protection with manual circuit isolation. |
| ▶ Resettable Design — No need for fuse replacement after an over-current event. |
| ▶ Wide Voltage Compatibility — Suitable for 12V, 24V, and 48V DC systems. |
| ▶ Durable Construction — Made from UL94V-0 rated thermal plastic for high temperature resistance. |
| ▶ Weather & Ignition Protected — IP67 water-resistant and meets SAE J1625, J1171, UL1500 standards. |
| ▶ Compact & Lightweight — Easy to integrate into various DC power distribution setups. |
Technical Specifications
| Parameter | Value |
|---|---|
| Rating | 150A |
| Voltage Compatibility | 12V / 24V / 48V DC |
| Type | Thermal Overcurrent Protection Device |
| Material | Thermal Plastic (UL rated 94V-0) |
| Operating Temperature | -32°C to 82°C |
| Storage Temperature | -34°C to 149°C |
| Terminals Size | M6 |
| Enclosure / Waterproof Rating | IP67 |
| Dimensions (L x W x H) | 74 x 48 x 37 mm |
| Weight | 110g |
Operating & Protection Principles
| Principle | Description |
|---|---|
| Over-Current Protection | Automatically trips to protect the circuit from excessive current due to faults or overloads. |
| Manual Isolation | Features a manual break option, allowing the unit to act as an On/Off switch for system disconnection. |
| Thermal Operation | Utilises a thermal mechanism to detect and react to sustained over-current conditions. |
| Ignition Protection | Certified to international standards (SAE J1625, J1171, UL1500) for safe use in environments with flammable vapours. |
Typical Applications
| Application Area | Use Case |
|---|---|
| Solar & Wind Systems | Connecting charge controllers to batteries, or between off-grid inverter DC inputs and batteries. |
| DC Power Distribution | Protection for general DC power distribution or charging circuits. |
| Automotive & Marine | Suitable for various DC automotive and marine applications requiring over-current protection. |
Built-In Protection Functions
This circuit breaker is designed with multiple layers of protection to ensure system safety. It provides automatic over-current protection against high power draw, short-circuits, and wiring mistakes. The unit is constructed from UL94V-0 rated thermal plastic, offering excellent flame retardancy. Furthermore, its IP67 rating ensures it is water-resistant and protected against dust ingress, making it suitable for challenging environments. It also meets international standards S.A.E. J1625, J1171, and UL1500, certifying its ignition protection for marine and other applications where flammable vapours may be present.
Common Questions
What is the main advantage over a traditional fuse?
Unlike a traditional fuse, this circuit breaker is resettable. After an over-current event, you can simply reset it, eliminating the need to replace a blown fuse. It also functions as a manual On/Off switch.
Can this breaker be used outdoors or in marine environments?
Yes, with an IP67 waterproof rating, it is protected against dust and temporary immersion in water. Additionally, it is ignition protected (SAE J1625, J1171, UL1500), making it safe for use in marine and automotive applications where flammable vapours may be present.
What voltage systems is this circuit breaker compatible with?
This circuit breaker is designed for a wide range of DC system voltages, specifically 12V, 24V, and 48V.
How is this circuit breaker mounted?
This circuit breaker is intended for surface mounting.
Installation Notes
- Ensure the circuit breaker's 150A rating matches or exceeds your circuit's maximum continuous current draw.
- Always disconnect power from the DC system before attempting installation or maintenance.
- Mount the breaker securely on a flat surface, ensuring proper ventilation if in an enclosed space.
- Use appropriate M6 terminals and ensure all connections are tight and secure to prevent resistance and heat build-up.
- Observe correct polarity when connecting to your DC system.
Before You Buy
- Verify the 150A rating is suitable for your specific application and connected loads.
- Confirm compatibility with your DC system voltage (12V, 24V, or 48V).
- Consider the physical dimensions (74 x 48 x 37 mm) and mounting requirements for your installation space.
- For complex installations, consult with a qualified electrician or solar installer.
- Review all local electrical codes and safety regulations for DC circuit protection.
Please ensure all specifications and compatibility requirements are thoroughly checked before purchase. Product details are based on manufacturer specifications and verified information.
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