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        Learn more by watching our HAGER ADM420T | 20 Amp 4 Pole 6kA | 30mA RCD/MCB Combo video.

        Hager Electrical | 4 Pole 20A RCBO 6kA | Type A 30mA RCD/MCB Combo

        The Hager ADM420T is a 4-pole RCBO (Residual Current Breaker with Overcurrent protection) rated 20A with a 6kA breaking capacity. The ADM420T combines Type A 30mA RCD and MCB functions in one DIN-rail module, complying with AS/NZS 61009-1. It is designed for commercial and residential 3-phase circuit protection where space and installation simplicity are priorities.

        Circuit protection boards often run tight on space when 3-phase circuits demand both RCD and MCB protection. The ADM420T combines both functions in a single 4-pole module, reducing the footprint compared to fitting separate RCD and MCB devices side-by-side. This space-saving approach appeals to sparkies configuring commercial switchboards and rental properties where din-rail real estate is a constraint. The module takes up one-third the space of two separate devices.

        Electricians value the ADM420T for its flexibility on tight boards. It delivers quality protection across 4-pole configurations, which is less common than 1 or 2-pole RCBOs but invaluable when the alternative is running short on din-rail space. The combo design eliminates the need to source and fit separate RCD and MCB devices, streamlining the installation process and reducing labour time on the job site.

        Features

        • 20 Amp rating — matches typical 3-phase lighting and power circuits without downsizing or thermal derating on the job.
        • 6kA breaking capacity — withstands common domestic and commercial fault currents and provides failsafe disconnection across all poles.
        • Type A 30mA RCD protection — detects AC and pulsating DC earth faults within 30mA, meeting the requirement for life safety in residential and commercial installations under AS/NZS 61009-1.
        • RCD and MCB in one module — combines residual current and overcurrent protection without requiring separate devices, saving din-rail space on the board.
        • 4-pole configuration — provides protection across all three phases plus neutral, essential for 3-phase switchboards serving motors, fans, and multi-circuit loads.
        • DIN-rail mounted — installs directly onto standard DIN rail with aligned terminals for modular consistency across the board.
        • C-curve tripping characteristic — suited for general load circuits; not intended for high inrush-current or motor-starting applications without prior circuit analysis.
        • Inbuilt test switch — allows periodic operation verification of the RCD function without the need for external test equipment or labour-intensive manual circuit testing.
        • Suitable for flush and recessed mounting — works in both surface and recessed distribution boards, offering flexibility on different job site installations.
        • Slower trip times than 1P/2P RCBOs — the 4-pole mass is higher than single or dual-pole modules, so trip times are longer; this is an acceptable trade-off for the space savings delivered on tight boards.
        • Operating temperature -25 to 40°C — rated for most Australian indoor switchboard environments without temperature derating.
        • IP20 rating — internal device protection suitable for enclosed distribution boards; achieves IP40 when installed in a switchboard enclosure.

        Where to use

        • 3-phase board protection — the ADM420T is installed on incoming 3-phase circuits for protection of commercial offices, residential buildings with 3-phase supply, and industrial installations.
        • Rental property rewires — space-constrained retrofit boards benefit from the combo design, reducing the number of modules needed and the cost of din-rail extension.
        • Motor control protection — the 4-pole design protects motor circuits feeding air conditioning units, industrial fans, or hydraulic pump systems.
        • Kitchen and laundry appliance circuits — 3-phase supply installations in commercial kitchens and laundries where equipment draws across all phases.
        • Workshop and garage installations — 3-phase circuits feeding welders, air compressors, or main distribution on job sites.
        • Switchboard upgrades — replacing older separate 3-phase RCD and MCB pairs with a single combo module to modernise protection and recover din-rail space.

        The ADM420T is a 4-pole device and is not suitable for single-phase circuits where 1-pole or 2-pole RCBOs would be the correct choice. It is not rated for DC applications and should not be used with DC power sources. The C-curve characteristic is not recommended for circuits with high inrush currents (such as motor starting) without prior circuit analysis and confirmation of sizing.

        Verified Sparky Direct customer reviews: Hager ADM420T (ADM420T)

        "Works as expected." — Luke

        "Good 4 pole alternative, helpful when the real estate is tight." — David

        "Great quality" — Derwent

        (ADM420T)

        The ADM420T complies with AS/NZS 61009-1, the Australian and New Zealand standard for RCBOs. It is approved for use on 3-phase circuits in domestic, commercial, and industrial installations where Type A 30mA earth leakage protection is required.

        This RCBO mounts directly onto DIN rail with a standard plastic clip. Terminate incoming and outgoing conductors (up to 16mm² flexible or 25mm² rigid) into the top and bottom cage clamp terminals using a 2Nm torque setting. Installation must be carried out by a licensed electrician in accordance with AS/NZS 3000 and local authority requirements.

        Yes, the ADM420T is compatible with other modules in the Hager ADM range and standard DIN-rail enclosures. It uses the same mounting footprint and aligned terminal system as all ADM modules, allowing seamless installation alongside single, dual, and triple-pole RCBOs on the same board.

        This 4-pole RCBO is designed for 3-phase circuits, providing protection across all three phases plus neutral in one module. Single-pole RCBOs protect one phase only. The 4-pole design is essential for 3-phase loads (motors, multi-circuit distributions) and saves significant din-rail space compared to fitting four separate 1-pole devices.

        This device has an electrical endurance rating of 2000 operating cycles and 4000 mechanical operations, giving it a service life of 10–15 years in typical commercial use. It is designed for long-term reliability in switchboards; annual inspection and testing under AS/NZS 3017 are recommended to verify operation.

        This RCBO includes a 2-year domestic and commercial warranty from Hager covering manufacturing defects. Warranty is valid from the invoice date and requires installation by a licensed electrician. In-home servicing is available through authorised Hager dealers.

        Hager offers auxiliary contact modules and mechanical operation indicators compatible with this RCBO for remote signalling and status monitoring. Consult the Hager datasheet or contact an electrical supplier for the full range of compatible accessories and details.

        This device is not suitable for single-phase circuits; use 1-pole or 2-pole RCBOs instead. It is not rated for DC circuits and should not be used with uninterruptible power supplies or DC power sources. The C-curve is not intended for circuits with high motor inrush currents without prior sizing review; such circuits may require a different curve type.

        The Hager ADM420T 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.

        100-Day Fuss-Free Returns
        We want you to love what you buy—but if you change your mind, that’s okay too. That’s why Sparky Direct offers a 100-day money-back guarantee.

        • Items must be unused, with all parts, accessories, and original packaging.
        • We can’t accept returns if the product is damaged, incomplete, or not in resalable condition.
        • Proof of purchase is required.
        • Return shipping is the responsibility of the customer. 

        If your item isn’t in its original condition, please contact us before returning it—we might save you time and money.

        All products come with a manufacturer’s or supplier’s warranty

        • Warranty starts from the Invoice Date
        • Some suppliers offer in-home warranties and handle claims directly, so you won’t need to uninstall or return the product. Chat with us to check if your product qualifies.
        • Sparky Direct isn’t responsible for losses caused by product failure.
        • Warranties are void if products aren’t installed by a licensed electrician.

        Damaged or Faulty Goods
        If your order arrives damaged or is faulty, let us know within 24 hours.

        • Sparky Direct will pay for return shipping via an emailed return label.
        • If the fault is confirmed, we will send you a replacement item or provide a refund.

        Contact us via our chat to arrange the return.

        Exclusions
        We can’t accept returns for:

        • Items that have been installed, modified, or used
        • Clearance, End of life, Discontinued, or special order items (unless faulty)
        • All PPE Items
        • Goods returned without original packaging or proof of purchase

        How to Request a Return

        1. Contact our customer service team with your order number.
        2. Confirm it’s eligible under our return or warranty policy.
        3. Pack the item securely and return it using a trackable service.
        4. Once we receive and inspect it, we’ll process your refund or replacement.

        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 ADM420T
        Model # ADM420T
        Barcode # 3250611032953
        Package Weight 0.455kg
        View Datasheet
        TYPE VALUE
        Type Circuit Protection
        Brand Hager Electrical
        Range ADM
        Rated Current (A) 20
        Height (mm) 84
        Width (mm) 71
        Depth (mm) 70
        Standards AS/NZ 61009-1
        Power Source AC 50Hz
        Mounting DIN Rail
        Voltage (V) 240/415
        Number of Poles 4
        IP Rating IP20 ( IP40 Enclosed )
        Breaking Capacity 6kA
        Neutral Position Right
        Earth Leakage Sensitivity 30mA
        Earth Leakage Protection Class Type A
        Curve C

        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.

        For website terms and conditions https://www.sparkydirect.com.au/terms-of-use

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