The Schneider Electric A9S4P080 is a 4-pole (4P) isolator from the Acti9 ISW 40...125 range, rated 80 A at 415 V AC. It is designed for isolation duty in distribution boards and carries a 2.5 kA rated breaking capacity under AC-22 utilisation category — meaning it handles mixed resistive and inductive loads typical of general distribution, not motor starting.
Rated operational current of 80 A at 415 V AC sets the continuous load limit. The AC-22 utilisation category confirms it is rated for switching mixed resistive and inductive loads — not for motor starting (AC-3) or pure resistive (AC-1). This is a distribution-board-grade figure — adequate for downstream sub-circuits but not for main incoming supply positions where higher SCCR is required. Short-circuit withstand of 20 A is the let-through current the device can endure under fault without damage. Rated insulation voltage (Ui) of 6 kV and impulse withstand voltage (Uimp) of 500 V define the insulation coordination. Rated supply voltage options of 48 V DC for 1-pole and 100 V DC for 2-pole cover DC control circuits, though the primary application is AC isolation at 415 V.
The A9S4P080 is certified to IEC 60947-3 (low-voltage switchgear — switches, disconnectors, switch-disconnectors and fuse-combination units) and IEC 60669-1 (switches for household and similar fixed electrical installations). Dual-standard compliance means it is accepted for both industrial distribution and commercial building installations across most markets.
Panel Integration
The isolator occupies 4 x 18 mm modular spaces on a DIN rail — standard for distribution board mounting. The 4P configuration switches all four poles simultaneously, providing full isolation for three-phase plus neutral circuits.