50A 12V/24V/48V Automatic over-current DC circuit breaker / switch
50A 12V/24V/48V Automatic over-current DC circuit breaker / switch
SKU:CB50
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50A 12V/24V/48V Automatic Over-Current DC Circuit Breaker / Switch
Resettable Fuse & Manual Isolator | IP67 Rated & Ignition Protected
The Photonic Universe 50A Automatic Over-Current DC Circuit Breaker (SKU: CB50) is a versatile protection device designed for a wide range of DC electrical systems. It seamlessly combines the critical functions of a resettable 50A fuse with a convenient manual On/Off switch, making it an ideal choice for applications requiring both robust over-current protection and circuit isolation.
Engineered to safeguard your system from high power draw, short-circuits, wiring errors, and equipment faults, this circuit breaker is compatible with 12V, 24V, and 48V DC systems. Its resettable nature offers a significant advantage over traditional fuses, eliminating the need for constant replacements after a trip.
ESSENTIAL PROTECTION: Combines automatic over-current protection with manual circuit isolation in one durable unit.
Key Features
| ▶ Dual Functionality — Acts as both a resettable 50A fuse and a manual On/Off isolator switch. |
| ▶ Wide Voltage Compatibility — Suitable for 12V, 24V, and 48V DC electrical systems. |
| ▶ Automatic Over-Current Protection — Guards against high current events, short-circuits, and system faults. |
| ▶ Resettable Design — Eliminates the need for fuse replacement, offering convenience and cost savings. |
| ▶ Durable Construction — Made from UL94V-0 rated thermal plastic, resistant to high temperatures. |
| ▶ Water & Dust Resistant — IP67 rated enclosure for reliable performance in challenging environments. |
Technical Specifications
| Parameter | Value |
|---|---|
| Rating | 50A |
| Voltage Compatibility | 12V/24V/48V DC |
| Type | Thermal Overcurrent Protection Device |
| Material | Thermal Plastic (UL 94V-0 Rated) |
| 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 & Wind Systems | Ideal for connecting 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 to protect against surges and faults. |
| DC Power Distribution | Suitable for protecting DC power distribution boards, charging circuits, and other general DC loads. |
| Automotive & Marine | Robust protection for DC automotive and marine applications, including engine compartments and bilge areas, due to its ignition protection and water resistance. |
Built-In Protection Functions
This Photonic Universe circuit breaker is designed with multiple safety features and certifications to ensure reliable operation:
UL 94V-0 Rated Thermal Plastic: The housing material meets the highest vertical burning classification for plastics, indicating it is self-extinguishing and prevents flaming drips, crucial for fire safety. • IP67 Enclosure: Provides complete protection against dust ingress and can withstand temporary immersion in water up to 1 metre for 30 minutes, making it suitable for damp and outdoor environments. • Ignition Protected (S.A.E. J1625, J1171, UL1500): Meets international standards for ignition protection, making it safe for use in marine engine compartments and fuel tank spaces where flammable vapours may be present.
Common Questions
What is the primary function of this circuit breaker?
It provides automatic over-current protection for DC systems and also serves as a manual On/Off switch for circuit isolation.
How does it compare to a traditional fuse?
Unlike a traditional fuse, this circuit breaker is resettable. After an over-current event, it can be manually reset, eliminating the need for fuse replacement.
Can this be used in marine environments?
Yes, its IP67 rating ensures protection against dust and water immersion, and it is ignition protected (meeting SAE J1171 and UL1500 standards), making it suitable for marine applications like engine compartments.
What does UL94V-0 mean for the material?
UL94V-0 indicates that the thermal plastic housing has a high flammability rating. It is designed to be self-extinguishing within 10 seconds after flame application and does not produce flaming drips.
Installation Notes
- This circuit breaker is designed for surface mounting.
- Ensure correct polarity when connecting to your DC system to avoid damage.
- Verify that your cable gauge is appropriate for a 50A current rating to prevent overheating.
- For safety and optimal performance, consider professional installation if you are unsure about wiring DC electrical systems.
Before You Buy
- Confirm your system's operating voltage (12V, 24V, or 48V DC) is compatible with this breaker.
- Ensure the 50A current rating is suitable for the maximum expected current draw of your circuit.
- Check the physical dimensions (74 x 48 x 37 mm) to ensure it fits your intended mounting location.
- Consider the environmental conditions of your installation to ensure the IP67 rating provides adequate protection.
Always verify product specifications and compatibility with your specific system requirements before purchase. Professional installation is recommended for complex electrical systems.
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