The A9V44363 is an Acti9 Vigi iC60 add-on residual current device — a voltage-independent RCD that clips onto the outgoing side of an iC60 MCB to add earth-leakage protection. Three-pole, 63 A rated current, 300 mA sensitivity, AC type, instantaneous trip.
63 A rated current and 300 mA sensitivity pair it with a 63 A iC60 MCB on three-phase outgoing circuits — lighting, distribution, or moderate motor loads where the 300 mA threshold is the standard for fire protection rather than personnel protection (30 mA). Instantaneous trip (no intentional time delay) means it clears a fault within tens of milliseconds. Voltage-independent tripping technology means the RCD operates even if the supply neutral is lost — the coil energy comes from the fault current itself, not the line voltage. Clip-on mounting to a DIN rail and screw connection to the MCB via tunnel terminals (1-35 mm² rigid, 1-25 mm² flexible) — the same footprint as the iC60 MCB, so it stacks directly in the same 7 x 9 mm pitch positions. IP20 finger-safe with the modular enclosure providing IP40.
Designed and certified to EN/IEC 61009-1 and EN/IEC 61009-2-1 (RCD + MCB assembly standards). Rated insulation voltage 500 V AC, rated impulse withstand voltage 6 kV per IEC 60947-2, pollution degree 3.