Hager ADM420QC RCBO 4P 6kA B20A 30mA typ A QuickConnect

The Hager ADM420QC combines a 4-pole miniature circuit breaker and a Type A residual current device in one compact module, with a dedicated overload protection for the neutral conductor. This integrated design saves space on the DIN rail while providing complete protection for 400 V three-phase circuits. The QuickConnect spring-loaded terminals reduce wiring time and ensure a reliable, maintenance-free connection.

Highlights

• 4-pole RCBO with B characteristic and 20 A rated current
• 30 mA residual current sensitivity, Type A for AC and pulsating DC faults
• 6 kA breaking capacity for short-circuit protection
• Neutral conductor overload protection included
• QuickConnect spring terminals for fast, secure wiring

In daily use

Installation is straightforward: the device snaps onto a standard DIN rail and occupies 4 modules (72 mm). The clear labeling and front-facing test button allow quick verification of the residual current function. The compact housing leaves more room for other devices in the distribution board.

Full specifications

• Device type: Residual current circuit breaker with overcurrent protection (RCBO)
• Number of poles: 4P
• Rated current (In): 20 A
• Tripping characteristic: B
• Rated residual current (IΔn): 30 mA
• Residual current type: A
• Rated breaking capacity (Icn): 6 kA
• Rated voltage (Ue): 230/400 V AC
• Frequency: 50/60 Hz
• Standard compliance: DIN EN 61009-1 (VDE 0664-20)
• Mounting type: DIN rail
• Connection type: Quick Connect (QC)
• Overload protection: Integrated
• Short-circuit protection: Integrated
• Neutral conductor overload protection: Yes
• Number of modules (TE): 4
• Degree of protection: IP20
• Rated impulse withstand voltage (Uimp): 4 kV

Final note

The ADM420QC is a reliable choice for protecting three-phase circuits in residential and commercial installations, offering both overcurrent and residual current protection in a single device.