Siemens 5SU1374-8DK81 RCBO. RCBO, 10 kA, 4P, type B+, short-time-delayed K, 30 mA, D char., In: 100 A, Un AC: 400 V. It belongs to RCBOs. Recorded manufacturer technical characteristics include Poles: 4P; RCD type: B+; Trip curve: D; Rated current: 100 A; Voltage rating: AC 400 V; Residual current: 30 mA; Breaking capacity: 10 kA.