The A9S2P100 is a 2-pole 100 A isolator from the Schneider Electric Acti9 ISW 40...125 range, designed for isolation duty in distribution boards. It complies with IEC 60669-1 and IEC 60947-3, rated for AC-22 utilisation category — meaning it handles mixed resistive and inductive loads, typical for general distribution isolation. The 2.5 kA rated breaking capacity suits it for downstream isolation where fault levels are moderate.
Sourcing reality — obsolete part
Schneider has marked the A9S2P100 as obsolete. The 2-module 18 mm footprint and 100 A AC-22 rating are the specs to match if evaluating a drop-in from another manufacturer's range.
The 100 A rating at 240 V AC is the headline — this isolator handles full panel feed or large subfeed isolation. The 2.5 kA breaking capacity is not a high-fault device; it's intended for isolation, not fault clearing upstream of a breaker. The DC rating is split: 48 V DC for single-pole use, 100 V DC for both poles in series — useful for battery-bank or DC distribution isolation. The 500 V impulse withstand and 6 kV rated insulation voltage give it headroom for 400 V AC systems with typical surge environments.