120A 12V/24V/48V Automatic over-current DC circuit breaker / switch

This 120 A circuit breaker combines functions of a resettable 120A fuse and On/Off switch in one unit. It is ideal for any DC system that requires both over-current protection and manual isolation of the circuit. The breaker is suitable for a wide range of DC system voltages from 12V to 48V.

Like any fuse, this circuit breaker is designed to protect the system from over-current as a result of high power draw, short-circuits, wiring mistakes, equipment faults or any other high current event. The circuit breaker is resettable which makes it a superior alternative to fuses which require replacement when blown.

Additionally, the breaker has a manual-break option which allows it to be used as an isolator On/Off switch for simple disconnection and reconnection of the system.

The circuit breaker is made from strong thermal plastic engineered to withstand high temperatures (UL94V-0 rated). The breaker is also water resistant (IP67 rated) and ignition protected (meets international standards S.A.E. J1625, J1171, UL1500).

This product is suitable for a wide range of DC applications, including

- Connecting solar or wind charge controllers to batteries;

- Between off-grid inverter DC input and batteries;

- DC power distribution or charging circuits;

- Other DC automotive and marine applications.

- Circuit breaker specifications
- Rating: 120A
- Type: Thermal overcurrent protection device
- Material: Thermal plastic ( UL rated 94V-0)
- Operating temperature: -32C to 82C
- Storage temperature: -34C to 149C
- Terminal size: M6
- Enclosure: IP67
- Size: 74 x 48 x 37 mm
- Weight: 110g
- Waterproof rating: IP67
- International standard ratings (S.A.E. J1625, J1171, UL1500)

Please note that this circuit breaker is intended for surface mounting.

- Time vs Rated Current graph for 120A Circuit breaker (CB120)
- Temperature derating graph for 120A Circuit breaker (CB120)