ABB S751/3-E40 Selective main circuit breaker, 40A, 3-pole

The Selective Main Circuit Breaker S751/3-E40 is certified according to DIN VDE 0641-21 as a SHU and is designed for the highest surge voltage category. This circuit breaker is suitable for a wide range of applications and has excellent selectivity properties to ensure high system availability. It can be mounted directly onto a 4 or 5-pole busbar system of 40mm and allows simultaneous blocking of the 3 poles of a 3-phase supply. With a built-in sliding lock, which can be locked in either the on or off position, it offers additional safety.

Technical data provide detailed insights into specific aspects of this product. The rated operational voltage is 230/400V AC, the rated insulation voltage is 690V, and the rated impulse withstand voltage can reach up to 9.8kV. With a rated frequency of 50/60Hz and a rated current strength of 40A, the switch offers optimal performance.

Other notable features include the disconnect function, the switching position indicator (red ON / green OFF), the insulation test voltage of 2kV, and the electrical life of 20,000 AC cycles. The ambient temperature for operation is between -25 ... +55 °C and for storage between -40 ... +70 °C.

The product measures 81mm (width) x 151.3mm (height) x 116mm (depth) and weighs 1.17kg.