The Schneider Electric A9DD1932 is an Acti9 iC60 RCBO — a combined residual current breaker with overcurrent protection in a single 6-module (54 mm) wide DIN-rail housing. The integrated 30 mA earth-leakage detection covers personnel protection and fire prevention in TN earthing systems.
The D-curve is the key selection gate: magnetic trip at 10–20× In (320–640 A for this 32 A unit). The 30 mA residual sensitivity meets IEC 61009-1 requirements for additional protection against direct contact; it also catches arcing faults a thermal-magnetic alone would miss. Thermal-magnetic trip technology gives a standard bimetal-plus-solenoid response, field-reliable and widely understood by panel builders. Clip-on mounting onto a 45 mm grid DIN rail — standard for any European-style distribution board. The 54 mm width (6 x 9 mm pitches) means it occupies six module positions; plan your enclosure fill accordingly. IP20 means the front is finger-safe but the terminals are not sealed against dust ingress — this is a panel-internal device, not for wet or outdoor locations.