Rockford Circuit Breaker 100AMP Rockford circuit breaker. Model Number: RFCB100 Retail Price: 15,400 yen Capacity: 100A Specifications: Circuit breaker 100A (1/0 or 4 gauge compatible) Includes a 1/0 gauge to 4 gauge conversion adapter, so it is compatible with 1/0 gauge or 4 gauge power cables. A safety device "circuit breaker" that automatically cuts off the circuit in the event of system abnormalities such as shorts or overloads, preventing equipment failure and fires caused by shorts. Brand new, unused, and unopened.