4.9 Based on 1181 reviews 
Description
Advanced Arc Fault Detection with Type A RCBO Protection – Compact 1 Module Design
Hager ARL975U AFDD
The Hager ARL975U AFDD with 25A RCBO is a compact protective device that delivers comprehensive circuit protection in a single module. It combines arc fault detection, 30mA Type A residual current protection, and Curve C tripping—making it ideal for mixed-use circuits with higher inrush currents or load fluctuations.
Its 1-metre neutral fly lead enables quick and straightforward installation in Hager TPN Distribution Boards. Designed for modern electrical systems, the ARL975U also features onboard diagnostics and Bluetooth connectivity via the Hager ProTools and Hager Pilot app, giving electricians smart tools to speed up commissioning and fault resolution.
Key Features – Hager ARL975U AFDD with 25A RCBO
- 25A, 6kA 1P+N RCBO with arc fault detection
- Tripping curve C, RCD type A (AC and pulsating DC sensitivity)
- 30mA residual current protection
- 1 module width (17.5mm) – space-saving for dense installations
- 1 metre neutral fly lead for easy fitment in Hager Invicta TPN boards
- Compatible with Hager consumer units and Invicta three-phase boards
- Onboard diagnostics with 8 LED indicators via ProTools
- Bluetooth-enabled updates and fault detection through Hager Pilot app
- Suitable for commercial, residential, and retrofit projects
- Fully compliant with Amendment 2 of the 18th Edition Wiring Regulations
- Independently certified to EN 61009-1 and EN 62606
Technical Overview – Hager ARL975U AFDD with 25A RCBO
Electrical performance
- Rated current: 25A (up to 28A at -25°C)
- Breaking capacity: 6kA (IEC 61009-1 and IEC 60898-1)
- Residual operating current (Idn): 30mA
- Operational voltage: 230V AC
- Frequency: 50Hz
Mechanical and installation
- Module width: 17.5mm
- Height: 125mm
- Depth: 70mm
- Terminal torque: top 2.4Nm, bottom 3.5Nm
- Top connection: screw terminal
- Bottom connection: bi-connect
- Pole configuration: 1P+N (double pole switching)
Environmental ratings
- Operating temperature: -25°C to +70°C
- Storage temperature: -25°C to +80°C
- Energy limitation class: I²t Class 3
- Ingress protection: IP20
Endurance
- Mechanical operations: 8,000 cycles
- Electrical operations: 2,000 cycles
What’s Included
- 1 x Hager ARL975U AFDD 25A Type A RCBO
Why Choose This Product?
The ARL975U AFDD simplifies circuit protection by combining AFDD, RCBO, and Curve C characteristics into one unit. With a 1-metre fly lead, it’s ready for use in Hager Invicta TPN boards and reduces installation time and wiring hassle. It supports fault detection and updates via Bluetooth, offering a modern solution for safety and convenience on site.
Guarantee and Compliance
This device includes a 1-year manufacturer’s warranty from Hager. It is tested to EN 61009-1 and EN 62606 and meets all requirements of Amendment 2 of the 18th Edition Wiring Regulations.
Summary
Hager ARL975U AFDD is a 25A Type A RCBO with integrated arc fault detection and Curve C tripping. Compact and Bluetooth-enabled, it’s designed for smart, compliant installation in Hager Invicta TPN distribution boards.
