【MULTIPLE USES】Used to protect cables and devices from overload or short circuit, and can be disconnected for maintenance and replacement of system devices. 【QUICK TO INSTALL】Compatible with Renogy Circuit Breaker Box and PV Combiner Box. Easily install on the standard DIN rail with the buckle design. 【DOUBLE SECURITY】Equipped with both the thermal and magnetic tripping mechanism for reliability and safety. 【DURABLE FOR USE】After the circuit breakers is disconnected, only reset is needed and there will be no damage. 【CLEARLY MARK】 Built-in indicator window helps identify the contact position., Manufacturer: Renogy