The Schneider Electric A9D73616T is a 1P+N residual current breaker with overcurrent protection (RCBO) from the Acti9 ISPN Vigi range. It combines a 16 A thermal-magnetic overcurrent trip (C-curve, magnetic tripping limit 5...10 x In) with integrated 30 mA earth-leakage protection in a single 18 mm-wide module that clips onto a DIN rail. The 6 kA Icn breaking capacity at 230/240 V AC (50 Hz) is sized for residential and light commercial final subcircuits where the prospective fault current stays under that threshold.
The C-curve (5...10 x In) means the magnetic trip operates between 80 A and 160 A — suited for circuits with moderate inrush, such as lighting banks, socket outlets, and small motor loads. The 30 mA earth-leakage sensitivity provides personal protection against indirect contact in TN earthing systems. The 18 mm width (2 x 9 mm pitches) and clip-on mounting mean it occupies a single DIN-rail module position in a final-distribution board, leaving space for adjacent RCBOs or MCBs in the same row. Terminals accept up to 25 mm² rigid upstream and 16 mm² rigid downstream; the tunnel-type connection and specified tightening torque (3.5 N.m upstream, 2 N.m downstream) are standard for panel-board wiring.