Siemens residual power circuit breaker 1 pin n c10 a 03 5su1656 7kk series siemens 5su1656 7kk16 the siemens 5su1656 7kk160 is a residual circuit breaker rcbo with a power rating of 230v ac 50 60hz 16a the type a instantaneous circuit breaker is compact in design with 1 pole neutral with a residual current trip rating of 30ma maximum and a tripping characteristic c makes this rcbo ideal for use in areas that represent an increased risk for personnel and the outdoor installation