30A 12V/24V/48V Automatic over-current DC circuit breaker / switch
30A 12V/24V/48V Automatic over-current DC circuit breaker / switch
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30A Automatic Over-Current DC Circuit Breaker / Switch
Resettable Fuse & Manual Isolator | 12V/24V/48V Systems | Model: CB30
The Photonic Universe 30A Automatic Over-Current DC Circuit Breaker (Model CB30) is a versatile protection device designed for a wide range of DC electrical systems. This unit combines the essential functions of a resettable 30A fuse and a manual On/Off switch, providing both robust over-current protection and convenient circuit isolation in one compact solution. It is suitable for DC system voltages from 12V to 48V.
Engineered to safeguard against high power draw, short-circuits, wiring mistakes, and equipment faults, this thermal circuit breaker offers a superior alternative to traditional fuses, eliminating the need for replacement after an over-current event. Its manual-break feature allows for simple disconnection and reconnection of your system, making it ideal for various solar, automotive, and marine applications.
KEY ADVANTAGE: Resettable design means no fuse replacements needed after an over-current event, saving time and cost.
Key Features
| ▶ Dual Functionality — Combines a 30A resettable fuse and an On/Off switch in one unit. |
| ▶ Wide Voltage Compatibility — Suitable for 12V, 24V, and 48V DC systems. |
| ▶ Thermal Over-Current Protection — Automatically protects against high power draw, short-circuits, and faults. |
| ▶ Resettable Design — Eliminates the need for fuse replacement, offering convenience and cost savings. |
| ▶ Manual Isolation — Functions as an isolator switch for easy system disconnection. |
| ▶ Durable Construction — Made from UL94V-0 rated thermal plastic for high-temperature resistance. |
| ▶ Weather Resistant — IP67 rated for splash and dust protection. |
| ▶ Ignition Protected — Meets S.A.E. J1625, J1171, UL1500 international standards. |
Technical Specifications
| Parameter | Value |
|---|---|
| Rating | 30A |
| Voltage Range | 12V / 24V / 48V DC |
| Type | Thermal Overcurrent Protection |
| Material | Thermal Plastic (UL94V-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 |
Typical Applications
| Application | Description |
|---|---|
| Solar & Wind Systems | Ideal for connecting solar or wind charge controllers to battery banks, ensuring protection against over-current. |
| Off-Grid Inverter Systems | Provides essential protection between off-grid inverter DC inputs and batteries. |
| DC Power Distribution | Suitable for general DC power distribution or charging circuits in various setups. |
| Automotive & Marine | Widely used in DC automotive and marine applications for circuit protection and isolation. |
Built-In Protection Functions
This Photonic Universe DC circuit breaker is designed with multiple layers of protection to ensure system safety and reliability. It provides robust thermal over-current protection against high power draw, short-circuits, wiring mistakes, and equipment faults. The unit is constructed from strong thermal plastic (UL94V-0 rated) to withstand high temperatures and is water-resistant with an IP67 rating, making it suitable for demanding environments. Furthermore, it is ignition protected, meeting international standards S.A.E. J1625, J1171, and UL1500, which are crucial for marine and automotive applications.
Common Questions
What is the primary advantage of a resettable circuit breaker over a fuse?
A resettable circuit breaker, like the Photonic Universe CB30, automatically resets or can be manually reset after an over-current event, eliminating the need to replace a blown fuse. This saves time, cost, and ensures continuous operation once the fault is cleared.
Can this circuit breaker be used as a simple On/Off switch?
Yes, in addition to over-current protection, this circuit breaker features a manual-break option, allowing it to function as a convenient On/Off isolator switch for easy disconnection and reconnection of your DC system.
Is this circuit breaker suitable for outdoor or marine environments?
Absolutely. The CB30 is IP67 rated, meaning it is highly resistant to water and dust ingress. It is also ignition protected, meeting S.A.E. J1625, J1171, and UL1500 standards, making it well-suited for demanding outdoor, automotive, and marine applications.
Installation Notes
- This circuit breaker is designed for surface mounting.
- Ensure correct polarity when connecting to your DC system.
- Always disconnect power before installation or maintenance.
- Consult a qualified electrician if you are unsure about installation procedures.
- Ensure M6 terminals are securely fastened to prevent loose connections and overheating.
Before You Buy
- Verify the 30A rating is appropriate for your circuit's maximum continuous current.
- Confirm your DC system voltage (12V, 24V, or 48V) is compatible.
- Check physical dimensions (74 x 48 x 37 mm) for your intended mounting location.
- Ensure your wiring uses appropriate M6 terminals for secure connection.
- Consider the environmental conditions; IP67 rating offers excellent protection.
Always verify product specifications and compatibility with your specific system requirements before purchase and installation. All technical data is based on manufacturer specifications.
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