The MGN19752 is a 2-pole residual current breaker with overcurrent protection (RCBO) from the Schneider Electric Acti9 DCP Vigi range, combining a 10 A thermal-magnetic C-curve MCB with integrated 30 mA earth-leakage protection in a single 36 mm wide DIN-rail module. The 10 kA breaking capacity (Icn at 220-240 V AC, 50 Hz) per EN/IEC 61009-2-1 and 10 kA Icu per EN/IEC 60947-2 gives it enough fault-clearing headroom for most residential and light commercial distribution boards without forcing an upstream breaker upgrade.
The 30 mA earth-leakage sensitivity is the standard for personal protection against indirect contact in IEC 60364 installations — it's what you'd specify for socket-outlet circuits or general-purpose final subcircuits where the fault path could go through a person. Integrated earth leakage means you don't need a separate RCD module upstream or downstream; the RCBO handles both overcurrent and ground-fault in one device, which saves a DIN position and simplifies wiring. The thermal-magnetic trip technology is field-proven and unaffected by harmonics that can confuse electronic trip units on some VFD-fed circuits.
Clip-on mounting to DIN rail, no screws needed for the rail attachment — push on until the latch clicks. Tunnel-type terminals top and bottom accept 1 to 35 mm² rigid or 1 to 25 mm² flexible; strip 12 mm and tighten to 2 N·m. The 76 mm depth means it sits flush with other Acti9 devices, so the gland plate clearance you already have for a 4-module board is fine. IP20 on the body (fingertip-safe), IP40 inside a modular enclosure — standard for distribution boards, not for washdown zones. Non-padlockable, so if your site requires lockout provisions, plan for a separate hasp on the board door or a padlockable cover. Local signalling (ON, OFF, fault trip) and a contact position indicator let you verify state without a meter — helpful during fault isolation when the line electrician needs to confirm the RCBO has actually opened.
The tropicalisation class 2 rating means it has passed damp-heat cyclic testing (95% RH at 55 °C) per IEC 60068-2-30 — suitable for coastal or high-humidity installations without derating. Limitation class 2 (energy-limiting) per IEC 60898-1 means it restricts let-through energy under fault conditions, which helps with downstream coordination. The 8/20 µs impulse withstand of 250 A per EN/IEC 61009-2-1 confirms it handles surge currents from switching transients or nearby lightning without nuisance tripping. RoHS and REACH compliance documentation is available from the manufacturer; CE marking applies for EU markets.