40A 12V/24V/48V Automatic over-current DC circuit breaker / switch
40A 12V/24V/48V Automatic over-current DC circuit breaker / switch
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40A 12V/24V/48V Automatic Over-Current DC Circuit Breaker
Resettable Fuse & Manual Isolator | IP67 Rated | SKU: CB40
The PhotonicUniverse 40A Automatic DC Circuit Breaker (SKU: CB40) offers essential over-current protection and manual circuit isolation for a wide range of DC systems. This versatile device functions as both a resettable 40A fuse and a convenient On/Off switch, making it an ideal solution for safeguarding your solar, automotive, or marine electrical installations.
Designed to protect against high power draw, short-circuits, wiring mistakes, and equipment faults, this circuit breaker eliminates the need for fuse replacements. Its robust construction, featuring UL94V-0 rated thermal plastic and an IP67 waterproof enclosure, ensures reliable performance in demanding environments.
VERSATILE PROTECTION: Suitable for 12V, 24V, and 48V DC systems, providing automatic over-current protection and manual circuit isolation.
Key Features
| ▶ Automatic Over-Current Protection — Safeguards DC systems from damaging current surges. |
| ▶ Resettable Design — Eliminates the need for fuse replacement after an over-current event. |
| ▶ Integrated On/Off Switch — Provides convenient manual isolation of the circuit. |
| ▶ Wide Voltage Compatibility — Operates seamlessly across 12V, 24V, and 48V DC systems. |
| ▶ IP67 Waterproof Rating — Ensures protection against dust and temporary water immersion. |
| ▶ Ignition Protected — Meets S.A.E. J1625, J1171, UL1500 standards for enhanced safety. |
Technical Specifications
| Parameter | Value |
|---|---|
| Rating | 40A |
| Voltage Compatibility | 12V / 24V / 48V DC |
| Type | Thermal Overcurrent Device |
| Material | Thermal Plastic (UL 94V-0) |
| Operating Temperature | -32°C to 82°C |
| Storage Temperature | -34°C to 149°C |
| Terminals Size | M6 |
| Enclosure Rating | IP67 |
| Dimensions (L x W x H) | 74 x 48 x 37 mm |
| Weight | 110g |
Typical Applications
| Application | Description |
|---|---|
| Solar Charge Controllers | Connects solar or wind charge controllers to battery banks, providing essential over-current protection. |
| Off-Grid Inverter Systems | Used between the DC input of off-grid inverters and batteries for safety and isolation. |
| DC Power Distribution | Ideal for protecting DC power distribution circuits in various setups, including caravans and motorhomes. |
| Automotive & Marine | Suitable for a wide range of DC automotive and marine applications where over-current protection and manual switching are required. |
| Battery Charging Circuits | Protects battery charging circuits from excessive current, ensuring safe and reliable operation. |
Built-In Protection Functions
This PhotonicUniverse DC circuit breaker is engineered with multiple safety features to protect your electrical systems. It provides reliable over-current protection to prevent damage from excessive current flow • The robust thermal plastic construction is UL 94V-0 rated for flammability resistance • An IP67 enclosure ensures the unit is dust-tight and protected against water immersion • Furthermore, it meets international standards S.A.E. J1625, J1171, and UL1500, signifying its ignition-protected design suitable for marine and automotive environments.
Common Questions
What is the primary function of this circuit breaker?
It combines a 40A resettable fuse with an On/Off switch, providing both automatic over-current protection and manual circuit isolation for DC electrical systems.
Can this replace a standard fuse?
Yes, it is designed as a superior, resettable alternative to traditional fuses, eliminating the need for replacement after an over-current event.
What voltage systems is it compatible with?
This circuit breaker is automatically compatible with 12V, 24V, and 48V DC electrical systems.
Is it suitable for outdoor or marine use?
Yes, with an IP67 waterproof rating and ignition protection meeting S.A.E. J1625, J1171, UL1500 standards, it is well-suited for demanding outdoor, automotive, and marine environments.
Installation Notes
- This circuit breaker is designed for surface mounting.
- Ensure correct DC polarity when connecting to your system.
- Always disconnect power before installing or servicing electrical components.
- Use appropriate M6 terminals for secure and reliable connections.
- Consult a qualified electrician if you are unsure about installation procedures.
Before You Buy
- Verify the 40A rating is suitable for your specific circuit's maximum current draw.
- Confirm your system voltage (12V, 24V, or 48V DC) is within the breaker's compatibility.
- Consider the physical dimensions (74 x 48 x 37 mm) for your intended mounting location.
- Ensure you have the necessary M6 terminal connectors for installation.
- This device protects against over-current; additional protection may be required for other fault types.
Please verify all specifications and compatibility requirements for your specific application before purchase. Product details are based on manufacturer specifications.
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