The Schneider Electric A9D73610 is an Acti9 iDPN Vigi RCBO combining a thermal-magnetic MCB and 30 mA earth-leakage protection in 18 mm width.
Above 30 °C ambient, derate per the manufacturer's thermal curve; the 95 % relative humidity at 55 °C rating confirms it handles tropical conditions in enclosed boards. C-curve means the magnetic trip fires between 5 and 10 times In (50–100 A instantaneous). That's the standard choice for circuits with moderate inrush — lighting banks, small transformers, or mixed socket loads — where you want to ride through brief start-up peaks without nuisance tripping. The 30 mA earth-leakage sensitivity is the standard for personal protection against direct contact (30 mA threshold per IEC 61009). This is integrated, not a separate add-on module — one DIN-space solution for the final circuit.
Clip-on mounting to DIN rail, 18 mm width (2 × 9 mm pitches). Neutral position is left, incoming at the top. Tunnel terminals accept 1–16 mm² rigid or flexible upstream, 1–10 mm² downstream. Wire strip length: 13 mm upstream, 11 mm downstream.