Siemens 5SU1644-6WK82 RCBO. RCBO, 10 kA, 4P, type A, selective, 300 mA, B char., In: 125 A, Un AC: 400 V. It belongs to RCBOs. Recorded manufacturer technical characteristics include Poles: 4P; RCD type: A; Trip curve: B; Rated current: 125 A; Voltage rating: AC 400 V; Residual current: 300 mA; Breaking capacity: 10 kA.