Hager RCD 25A Type A 30mA 2 Pole 2 Module CDA225U

Hager CDA225U: 25A 30mA 2 Pole Type A RCCB (Residual Current Circuit Breaker) for DIN rail installation, providing automatic disconnection on earth fault conditions.

Safety & Reliability

This residual current circuit breaker RCCB opens the circuit automatically if it detects an earth fault between line and earth, or neutral and earth. The 30mA sensitivity and Type A leakage current rating mean it responds to both standard AC residual currents and pulsating DC faults, giving broader protection than a standard Type AC device on circuits feeding equipment with electronic components.

A trip-free mechanism is built in as standard, so the RCCB cannot be held closed against a genuine fault condition. It can also be padlocked in either the on or off position using a Hager MZN175 accessory, useful for isolation during maintenance or to prevent unauthorised reclosing.

Clear Status Indication

A rectangular flag indicator shows the switching state at a glance: red for closed, green for open, and yellow when the device has tripped on a fault. This means electricians and facilities staff can identify a tripped RCCB quickly on a busy distribution board without needing to test each way individually.

Installation & Compliance

Built to BS EN 61008 and IEC1008, this Hager RCCB is manufactured in France and suited to standard consumer unit and distribution board installations. Terminals accept 25mm² rigid or 16mm² flexible conductors, and the 2-module width keeps board layouts compact. DIN rail mounting and a 70mm recess depth make it straightforward to fit into most enclosures.

As a two-pole device rated at 25A with a 6kA short-circuit withstand rating, it is well suited to single-phase domestic and light commercial circuits where a dedicated residual circuit current breaker is needed ahead of final circuit protection.

Key Features of the Hager CDA225U RCCB Include:

• Automatically Disconnects On Earth Fault Between Line/Neutral And Earth
• Type A Leakage Current Detection Covers AC And Pulsating DC Faults
• Trip-Free Mechanism Prevents Closing Onto A Live Fault
• Can Be Padlocked On Or Off Using MZN175 Accessory
• Flag Indicator Shows Closed (Red), Open (Green) And Tripped (Yellow) States
• Compact 2-Module Width Suits Standard Distribution Boards
• Rated Current: 25A
• Rated Residual Operating Current: 30mA
• Number Of Poles: 2
• Rated Voltage: 230V
• Rated Insulation Voltage (Ui): 500V
• Rated Impulse Withstand Voltage (Uimp): 4kV
• Short-Circuit Withstand Rating (Icw): 6kA
• Surge Current Capacity: 0.25kA
• Frequency: 50Hz
• Ingress Protection Rating: IP20
• Ambient Operating Temperature: -25°C And Above
• Terminal Capacity: 25mm² Rigid / 16mm² Flexible
• Mounting Method: DIN Rail
• Recess Depth: 70mm
• Width: 2 Modular Spacings
• Compliance: BS EN 61008, IEC1008

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