The Schneider Electric A9DH3620 is an Acti9 iCV40 residual-current circuit breaker with overcurrent protection (RCBO) — a single module that combines a 20 A thermal-magnetic MCB with a 30 mA earth-leakage detector in a 1P+N package.
Rated 20 A continuous and 6 kA breaking capacity (Icn) at 230 V AC, 50/60 Hz per EN/IEC 61009-2-1 — that 6 kA figure is the short-circuit it can safely interrupt under standard test conditions. For a domestic or light commercial final subcircuit fed by a transformer or a utility service with a prospective fault current under 6 kA, this RCBO covers the branch without needing an upstream current-limiting device. The 30 mA earth-leakage threshold meets the touch-protection requirement for socket-outlet circuits in most IEC-based wiring rules. Thermal-magnetic trip technology means the bimetal handles overloads (slow response to sustained overcurrent) while the solenoid handles short-circuits (instantaneous above the magnetic threshold).
Tunnel terminals top and bottom accept 1 to 16 mm² rigid or 1 to 10 mm² flexible cable; strip 14 mm and torque to 2 N·m. The 9 mm phase-to-neutral pitch keeps the busbar alignment clean in a multi-pole assembly.
Listed as current production (active lifecycle). This RCBO is a standard catalogue item in the Acti9 range.