The Schneider Electric A9DC6920 is an Acti9 iC60 RCBO — a residual current breaker with overcurrent protection, combining a 20 A thermal-magnetic MCB and a 30 mA earth-leakage module in one 54 mm wide, 3P+N unit. Its 6 kA Icn breaking capacity at 400/415 V is rated for TN earthing systems on AC networks at 50/60 Hz, making it a standard outgoer device for final subcircuits in commercial and light industrial distribution boards.
The 20 A rated current (at 30 °C) sets the continuous load limit for the thermal-magnetic trip; the C-curve characteristic means it holds up to 5–10× In for short-duration inrush, so it suits mixed resistive-inductive loads like lighting banks or small motor circuits. The 30 mA earth-leakage sensitivity provides personnel protection (indirect contact) per AS/NZS 61009.1 — the standard this unit is certified to. The 6 kA Icn breaking capacity at 400/415 V is the maximum prospective fault current the device can safely interrupt; for installations with higher available fault current, a current-limiting upstream device is needed to keep the let-through within the 6 kA rating.
Clip-on mounting to a 45 mm grid DIN rail (standard EN 60715). The 54 mm width occupies 6 modules of 9 mm pitch. Wire strip length is 11 mm for the bottom connection. The unit is padlockable with a Ø 4 mm padlock for lockout/tagout.