Hager | RCBO 6A 1P+N 30mA C-Curve | 6kA Breaking Capacity
The Hager ADC906T is a 1P+N residual current breaker with overcurrent protection (RCBO), rated 6A on a C curve with 30mA earth leakage sensitivity. The ADC906T combines miniature circuit breaker overcurrent protection and Type A residual current detection in a single 1-module DIN rail device, with a 6kA short-circuit breaking capacity to IEC 60898-1. It operates at 230 to 240V AC and complies with AS/NZS 61009-1 for the Australian market. The device guards a single final subcircuit against earth leakage, thermal overload, and short circuit.
Domestic and light commercial boards run short of space during retrofit and new build work, and every circuit that needs both earth leakage and overload protection can eat two positions. The ADC906T puts both functions in a single 1-module footprint, 17.7mm wide, so one device covers what a separate RCD and MCB would. Its Type A residual current detection catches both AC and pulsating DC leakage from modern electronic loads, which a Type AC device does not see.
The ADC906T lands on a standard DIN rail and takes screw terminals at the top, with a biconnect bottom terminal for pin busbar connection. The 1-module width frees positions for extra circuits without oversizing the board, and the C curve at 6A suits low-current lighting and control subcircuits. Its non-sensitive line and load terminals mean orientation is not fixed, which simplifies a like-for-like swap on an existing board.
Features
- 1P+N RCBO in one module — the ADC906T combines residual current and overcurrent protection in a single 17.7mm DIN rail module, replacing a separate RCD and MCB.
- 6A C-curve rating — the C tripping curve at 6A suits low-current lighting, control, and general final subcircuits.
- 30mA Type A sensitivity — the ADC906T trips at 30mA residual current and detects both AC and pulsating DC leakage, the default RCD class for current Australian wiring practice.
- 6kA breaking capacity — the device is rated 6kA short-circuit breaking capacity to IEC 60898-1 for domestic and light commercial fault levels.
- Biconnect bottom terminal — the bottom connection lands on a single-phase pin busbar, removing the need to wire each device individually to the active and neutral bars.
- Screw terminal top connection — the top terminals take a 1 to 16mm2 conductor under screws for a standard switchboard termination.
- Non-sensitive line and load terminals — supply and load can land on either end, so a like-for-like brand swap does not force a rewire.
- Rated endurance — the ADC906T is rated for 10,000 electrical operations and 20,000 mechanical operations under the Hager datasheet.
- Wide operating range — the device operates from -25 to 70 degrees C, with rated current derating above 30 degrees C per the datasheet curve.
- Enclosure required — the ADC906T is an IP2X modular device for installation inside a switchboard or enclosure, not for exposed or standalone mounting.
Where to use
- Lighting subcircuits — the 6A C-curve rating of the ADC906T suits residential and commercial lighting circuits needing combined earth leakage and overload protection.
- Control and low-current circuits — the 6A rating fits control, signalling, and small dedicated circuits on a single-phase board.
- Domestic switchboards and load centres — the 1-module footprint adds circuit-level protection to cramped boards during retrofit and renovation.
- New build final subcircuits — the ADC906T provides per-circuit RCD and MCB protection on new single-phase installations.
- Board upgrades and retrofits — the compact footprint allows protection upgrades on existing boards without a full board replacement.
- Pin busbar assemblies — the biconnect terminal suits boards built on a single-phase pin busbar for neat, repeatable wiring.
The Hager ADC906T is a modular device for enclosure installation only and is not rated for exposed or standalone mounting outside a switchboard. It is a Type A device and is not suitable for circuits where smooth DC or high-harmonic leakage is expected, which require a Type B or Type F RCBO. It does not provide protection above its 30mA sensitivity or 6A rating.
