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Learn more by watching our HAGER ADC920T | 20Amp 6 kA Single Pole RCBO video.
The Hager ADC920T is a 20A 6kA single-pole RCBO (Residual Current Breaker with Overcurrent Protection) rated 240V AC, combining earth leakage and overcurrent protection in a single one-module DIN rail device. The ADC920T operates to AS/NZS 61009-1, carries a Type A earth leakage characteristic for protection against pulsating DC residual currents, and trips at 30mA: the threshold mandated for general domestic and commercial circuit protection in Australia. Certified RoHS compliant and rated IP20 in open installations (IP40 when enclosed).
Installing an RCBO on a switchboard circuit that previously relied on a separate MCB and safety switch combination means one device does the work of two, but the space saving is what drives the specification. Space in domestic and commercial switchboards is rarely in surplus, particularly in retrofit and upgrade work where existing enclosures are already tight. The ADC920T occupies a single 17.5mm module width, the same footprint as a standard MCB, so fitting per-circuit earth leakage protection into an existing board doesn't require a new enclosure or an additional RCD rail. Hager's biconnect bottom terminal accepts the neutral connection from either the cable directly or a pre-wired tail, which cuts termination time when the board layout doesn't have a straight run to the neutral bar.
For electricians specifying per-circuit protection on solar, EV charging stations, patient areas, or transportable structures, the ADC920T covers switched neutral applications, a requirement in those installations that a standard RCBO without a switched neutral cannot meet. Bi-directional operation means line and load terminals are non-sensitive, so the ADC920T drops straight in as a replacement for an alternative-brand RCBO without rewiring the feed direction. The pre-installed neutral tail comes at a good length for most board configurations, and the built-in fault trip indicator makes fault diagnosis straightforward without pulling the board apart. Electricians stock these across domestic and commercial boards because one SKU handles both the standard 30mA protection requirement and the switched neutral applications that keep coming up on EV and solar jobs.
The ADC920T is not rated for three-phase installations as a standalone device. It is a 1P+N single-phase RCBO. Do not use the ADC920T on circuits where prospective fault current exceeds 6kA; a 10kA-rated device is required in those locations. The ADC920T is also not suitable for use as a main incomer or supply-side isolating device.
Verified Sparky Direct customer reviews: HAGER ADC920T | 20Amp 6 kA Single Pole RCBO (ADC920T)
"Love these CBs, perfect fit and easy to install." — Mark.R
"Quick and easy to install, neutral tail is a good length." — Alan
"Easy to install and very reliable, no false trips." — Jeff
(ADC920T)
The ADC920T is certified to AS/NZS 61009.1, the Australian and New Zealand standard for combined residual current and overcurrent protection devices. It is rated for use on final subcircuits in installations wired to AS/NZS 3000. Hager publishes the product datasheet at hager.com/au, which lists the certification details and test approvals in full.
A licensed electrician must install the ADC920T. The unit sits on the DIN rail inside a switchboard and connects to active and neutral conductors at mains voltage. Australian electrical safety law restricts switchboard work to licensed electrical workers, regardless of whether the property is owner-occupied or rented.
The ADC920T uses the biconnect bottom terminal, which lands directly on the Hager Onekonekt single-phase pin busbar. This removes the need to wire each RCBO individually to the active and neutral bars. The KDN180A 12-pole Onekonekt busbar is the common pairing on a single-phase domestic board.
Type A devices detect both AC residual currents and pulsating DC residual currents. Modern electronic loads, including LED drivers, switch-mode power supplies, and many household appliances, produce pulsating DC leakage that a Type AC device will not see. Type A is the default RCD class for general final subcircuits in current Australian wiring practice.
The ADC920T is rated for 10,000 electrical operations and 20,000 mechanical operations under the Hager datasheet. This is typical endurance for a domestic and light commercial RCBO and well beyond the in-service operating frequency of a final subcircuit breaker, which trips only on fault conditions.
Hager covers the ADC920T under its standard manufacturer warranty against defects in materials and workmanship. Sparky Direct passes warranty claims through to Hager Australia on the buyer's behalf when proof of purchase is provided. Current warranty terms are published on the Hager Australia website.
The KDN180A 12-pole Onekonekt busbar fits the ADC920T and other single-module ADC9 series RCBOs on a single-phase board. Hager publishes the full Onekonekt range on hager.com/au, including longer busbars for higher-density installations and three-phase variants where the chassis needs them.
Avoid EV charging circuits and solar PV inverter circuits with DC-side components, which need a Type B RCBO to handle smooth DC residual currents. Avoid installations where prospective fault current exceeds 6 kA; those need a higher breaking capacity device. The ADC920T is also single-phase only and cannot protect three-phase loads.
The ADC920T is manufactured and tested to AS/NZS 61009-1, the Australian and New Zealand standard for residual current operated circuit breakers with integral overcurrent protection. The 30mA trip threshold meets the standard earth leakage protection requirement for domestic and commercial circuits under AS/NZS 3000.
A standard RCD or safety switch provides earth leakage protection for multiple circuits from a single device. The ADC920T is a per-circuit RCBO — it combines earth leakage protection and overcurrent protection (MCB function) in one module, so each circuit gets its own independent protection. A fault or nuisance trip on one circuit does not take down the other circuits protected by a shared RCD.
In most cases, yes. The ADC920T has bi-directional (non-sensitive) line and load terminals, so the existing cable can terminate on either terminal without reversing the feed. The pre-installed neutral tail connects to the neutral bar directly. Installation must be carried out by a licensed electrician.
The ADC920T carries a Type A earth leakage characteristic, which protects against both sinusoidal AC and pulsating DC residual currents. This makes it suitable for EV charging station circuits and solar inverter circuits, where inverter-driven loads can produce pulsating DC components that would cause nuisance tripping in a Type AC device.
Switched neutral means the ADC920T breaks both the active and neutral conductors simultaneously when it trips, providing full isolation of the circuit. Installations that require switched neutral operation include construction site temporary boards, transportable structures (caravans, demountables), patient area circuits in healthcare facilities, EV charging station circuits, and solar PV installations. A standard RCBO without switched neutral only breaks the active conductor.
The ADC920T carries a two-year warranty for both domestic and commercial use, covering manufacturing defects. The warranty period starts from the invoice date. Warranty claims are handled via return to Sparky Direct.
The ADC920T is rated for DIN rail mounting and is compatible with Hager's single-phase busbar system, which allows direct busbar connection without individual cable feeds to each device. Hager distributes a range of DIN rail enclosures and load centres designed to accept the ADC-series RCBOs.
The Hager ADC920T is available online from Sparky Direct, with Australia-wide delivery to any state or territory including regional areas. Sparky Direct is an Australian electrical wholesaler established in 2005, supplying more than 500,000 customers with transparent trade pricing.
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Warranty starts from Invoice Date
Domestic Use: 2 Year
Commercial Use: 2 Year
Warranty Method: Return to Sparky Direct
These specifications and characteristics outline physical, mechanical, electrical details.
| Brand | Hager Electrical |
| SKU | ADC920T |
| Model # | ADC920T |
| Barcode # | 3250611033363 |
| Package Weight | 0.160kg |
| TYPE | VALUE |
|---|---|
| Type | Circuit Protection |
| Brand | Hager Electrical |
| Rated Current (A) | 20 |
| Height (mm) | 85 |
| Width (mm) | 18 |
| Depth (mm) | 70 |
| Depth (mm) | 77 |
| Standards | AS/NZ 61009-1 |
| Mounting | Din Rail |
| Curve | C |
| Voltage (V) | 240V |
| Earth Leakage Protection Class | Type A |
| Earth Leakage Sensitivity | 30mA |
| Box increments (This item is sold individually) | 54 |
| Residual Current | 30mA |
| Breaking Capacity | 6kA |
| Overcurrent trip characteristic | C Curve |
| Earth Fault Wave Form | Type A |
| IP Rating | IP20 ( IP40 Enclosed ) |
| Number of Poles | 1P+N |
Electrical and HVAC products sold by Sparky Direct are intended for installation by licensed and appropriately qualified professionals in accordance with applicable Australian Standards and regulatory requirements. Customers are responsible for ensuring that any product purchased, including any related or associated components, is compatible and suitable for their intended installation and application.
Sparky Direct does not provide installation advice and does not assess product suitability for individual circumstances unless expressly confirmed in writing. Customers must confirm correct product selection, compatibility, compliance, and suitability with a licensed or appropriately qualified professional prior to purchase.
Tools sold by Sparky Direct must be used safely and in accordance with the manufacturer’s instructions. Customers are responsible for ensuring they have the necessary knowledge and competence to operate any tool purchased. If you are unsure how to safely or correctly use a tool, do not use it and seek guidance from the manufacturer or a suitably qualified professional.
Nothing in this clause limits or excludes any rights or guarantees available under the Australian Consumer Law.
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