16818 Domae product is a residual current circuit breaker (RCCB). It is a 2P circuit breaker with 40A In rated current, 100mA earth leakage sensitivity and AC type protection class. This product protects against electrical shock by indirect contact and fire hazards. It performs the function of disconnection of electrical circuits in case of earth fault. It has control of on load electric circuit, already protected against overloads and short circuit. This product is compliant with IEC 61008-1 standard. The (Im/IΔm) rated breaking and making short circuit capacity is 500A. The (Inc/IΔc) conditional rated short circuit current is 3000A. It has an electrical endurance going up to 2000 cycles and a mechanical endurance going up to 5000 cycles. The Ue operational voltage is 230VAC. The Ui rated insulation voltage is 440VAC. The Uimp rated impulse withstand voltage is 4kV. The frequency is 50Hz. It is DIN rail mountable. The width in 9mm pitches is 4. The dimensions are (W) 36mm x (H) 81mm x (D) 76mm. The weight is 0.18kg. According to IEC 60529 standard, the degree of protection is IP20 and IP40 in enclosure. The operating temperature is from -5°C to 40°C. The storage temperature is from -40°C to 60°C.