Differential block ABB DDA203 3P 40A 30mA type AC 2 modules B427926

The differential blocks are mechanically designed to prevent incorrect coupling between the block and the switch: the power of the block must always be equal to or greater than that of the magneto-thermal switch. The lateral plastic clamp allows for faster assembly of the block on the circuit breaker and a button prevents possible interventions. It is used to protect human health in the event of an earth fault (electrical leakage) or phase-to-earth electrocution, thus also providing protection against macro electric shocks, both direct and indirect, on exposed persons. The AC type differential block works only with alternating current. Almost all systems for civil use fall into this typology. Characteristics: Series Abb Rated voltage 230/400Vac Rated current In 40A Rated residual current 30mA Type of residual current device AC 2 modules 3 poles Height 93 mm Width 87 mm Depth 76 mm Net weight 158 gr