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The C curve is able to tolerate short duration surges of up to five to ten times the rated current and is widely used in domestic systems. A circuit breaker is a safety device capable of automatically interrupting (i.e. without external intervention) the flow of electric current in an electrical circuit in the event of an overcurrent. Characteristics: Siemens series Voltage 400 Vac Current In 20A Breaking capacity Icn 6kA Tripping curve C 3 modules Poles 3P Protection degree IP20, with wires connected Height 90 mm Width 54 mm Depth 76 mm Recessed depth 70 mm Net weight 335 g Suitability for use Residential construction / Infrastructure