DC circuit breaker, like their name suggests, is used for the protection of electrical devices that operate with direct current . The main difference between direct current and alternating current is that in DC the voltage output is constant, while in AC it cycles several times per second. Specifications: Place of Origin: China Brand Name: USEFUL Model Number: FMB7-PV Rated Voltage: 12V-1000V BCD Curve: C Certificate of circuit breaker: CE Pole of circuit breaker: 1P,2P,3P,4P Case of circuit breaker: re-resistant and shockproof plastic Performance of circuit breaker: Reliable and excellent The function of circuit breaker: Protect overload and short circuit Type: Mini Rated Frequency: 50/60hz Poles Number: 1P,2P,3P,4P Package Includes: 1 x USFULL DC Breaker