Four-pole differential (4 poles) Differential 4 poles 63A 30mA Class B OMR104B63003 €161.68 (€133.62 tax excl.) Three-phase differential 4 poles (3P+N) 63A 30mA (0.03A) class B. It allows the detection of 50Hz sine and pulsating signals with mixed components and pure direct current component signals, ensuring at all times the protection of people from isolation/derivation problems in electrical installations or elements. Breaking capacity 10kA. Class “B” is... Add to cart