EATON Cutler-Hammer Series s FAZ, dual rated UL and IEC circuit breakers are ideal for providing protection in many applications. A current limiting design provides fast short-circuit interruption, offering superior protection by reducing peak let-through current. Superior product quality, tested reliability and safety makeUL 1053 Residual Current Circuit Breaker (RCCB) the optimum product for residual current applications. The UL 1053 RCCB circuit breakers provide safety and protection for personnel and equipment.