The circuit breaker combines the functions of a resettable 40A fuse and an 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 resulting from high power draw, short-circuits, wiring mistakes, equipment faults or any other high current event.

The circuit breaker is resettable, making it a superior alternative to fuses that 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). It 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: 40A

- 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

- Terminals 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.

40A 12V/24V/48V Automatic over-current DC circuit breaker / switch