120A 12V/24V/48V AUTOMATIC OVER-CURRENT DC CIRCUIT BREAKER / SWITCH FOR PANEL OR RECESS MOUNT
120A 12V/24V/48V AUTOMATIC OVER-CURRENT DC CIRCUIT BREAKER / SWITCH FOR PANEL OR RECESS MOUNT
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120A 12V/24V/48V Automatic Over-Current DC Circuit Breaker
CBR120 | Resettable Fuse & Isolator Switch | Panel or Recess Mount
The Photonic Universe 120A Automatic Over-Current DC Circuit Breaker (SKU: CBR120) is a versatile protection device designed for a wide range of DC electrical systems. This unit combines the essential functions of a resettable fuse and a manual on/off isolator switch, providing robust overcurrent protection and convenient circuit isolation.
Ideal for safeguarding against high power draw, short-circuits, wiring errors, or equipment faults, this circuit breaker eliminates the need for fuse replacements. Its durable, water-resistant construction ensures reliable performance in demanding environments, making it a crucial component for solar, automotive, and marine applications.
SYSTEM COMPATIBILITY: Suitable for 12V, 24V, and 48V DC systems.
Key Features
| ▶ Resettable Overcurrent Protection — Automatically trips on overcurrent events and can be reset, unlike traditional fuses. |
| ▶ Manual Isolation Switch — Functions as an on/off switch for safe disconnection and reconnection of DC circuits. |
| ▶ Wide DC Voltage Compatibility — Operates effectively across 12V, 24V, and 48V DC systems. |
| ▶ Durable & Weather-Resistant — Constructed from UL94V-0 rated thermal plastic and features an IP67 waterproof rating. |
| ▶ Versatile Mounting Options — Designed for convenient panel or recess mounting in various installations. |
Technical Specifications
| Parameter | Value |
|---|---|
| Rating | 120A |
| 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 |
| Terminal Size | M6 |
| Enclosure Rating | IP67 |
| Dimensions (L x W x H) | 74 x 48 x 37 mm |
| Weight | 110g |
| International Standards | S.A.E. J1625, J1171, UL1500 |
Typical Applications
| Application | Description |
|---|---|
| Solar & Wind Systems | Connects solar or wind charge controllers to battery banks, providing essential overcurrent protection. |
| Off-Grid Inverter Protection | Installed between an off-grid inverter's DC input and batteries to protect against high current events. |
| DC Power Distribution | Used in DC power distribution or charging circuits to protect connected equipment and wiring. |
| Automotive & Marine | Suitable for various DC automotive and marine applications, offering ignition protection. |
Built-In Protection Functions
This Photonic Universe DC circuit breaker is engineered with multiple safeguards to ensure system integrity and safety. It provides reliable overcurrent and short-circuit protection, automatically interrupting the circuit when dangerous conditions arise. The unit is constructed from UL94V-0 rated thermal plastic, indicating high flame retardancy and self-extinguishing properties. With an IP67 enclosure rating, it offers complete protection against dust ingress and can withstand temporary immersion in water. Furthermore, it meets international standards S.A.E. J1625, J1171, and UL1500, signifying ignition protection, making it safe for use in environments like engine compartments.
Common Questions
What is the primary function of this circuit breaker?
Its primary function is to provide automatic overcurrent protection for DC electrical systems and to serve as a manual on/off isolator switch for safe circuit disconnection.
Can this circuit breaker replace a standard fuse?
Yes, it is designed as a resettable alternative to traditional fuses. When an overcurrent event occurs, it trips and can be reset manually, eliminating the need for fuse replacement.
Is this suitable for outdoor or marine use?
Absolutely. With an IP67 waterproof rating, it is fully protected against dust and temporary water immersion. Its compliance with S.A.E. J1625, J1171, and UL1500 standards also certifies it for ignition protection, making it suitable for marine and automotive environments.
What voltage systems is this circuit breaker compatible with?
This circuit breaker is compatible with a wide range of DC system voltages, specifically 12V, 24V, and 48V.
Installation Notes
- Ensure the circuit breaker's current rating matches or exceeds the maximum expected current draw of your DC system.
- Install in a location that allows for easy access for manual reset or isolation.
- Verify correct polarity when connecting to your DC system to prevent damage.
- While IP67 rated, ensure terminals are properly sealed and protected from direct, prolonged water exposure where possible.
- For panel or recess mounting, ensure adequate space and ventilation around the unit.
Before You Buy
- Check Current Rating: Confirm the 120A rating is appropriate for your specific application.
- Verify System Voltage: Ensure your DC system operates within the 12V/24V/48V compatibility range.
- Consider Mounting Type: This unit supports panel or recess mounting; plan your installation accordingly.
- Terminal Compatibility: Note the M6 terminal size for appropriate cable lug selection.
- Consult an Electrician: If unsure about installation or system compatibility, consult a qualified professional.
Always verify product specifications and compatibility with your existing system components before purchase. All information is based on verified manufacturer data and industry standards.
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