The Schneider Electric A9D54616 is an Acti9 iDPN Vigi residual-current circuit breaker with overcurrent protection (RCBO) — a single-module unit combining a 16 A thermal-magnetic MCB and a 30 mA earth-leakage trip in one 36 mm wide housing. Breaking capacity is 4500 A Icn at 230...240 V AC, conforming to EN/IEC 61009-2-1. That is a standard domestic and light commercial fault level; the limitation class 3 rating means it limits let-through energy well enough to protect downstream wiring in most final-subcircuit applications.
Neutral is on the left, phase on the right, with a 9 mm connection pitch between them. Terminals accept 1...16 mm² rigid or 1...10 mm² flexible (with or without ferrule); strip length is 15 mm, tightening torque 2 N.m.
Standards compliance: EN/IEC 61009-2-1 (RCBO product standard), overvoltage category III per IEC 60364, tropicalisation class 2 per IEC 60068-1 (handling up to 95 % relative humidity at 55 °C). The toggle provides local ON/OFF/fault-trip indication. Rated for 20,000 electrical and 20,000 mechanical cycles — typical for a final-circuit breaker in a distribution board where switching is infrequent but fault protection must be reliable over decades.