1. Introduction
This manual provides essential information for the safe installation, operation, and maintenance of the Hager CFC225P Residual Current Device (RCD). Please read this manual thoroughly before installation or use and retain it for future reference. This device is designed to protect against electric shock by detecting earth leakage currents and rapidly disconnecting the supply.
2. Safety Information
WARNING: Electrical installation and maintenance should only be performed by qualified and competent persons in accordance with national wiring regulations and local safety standards. Failure to comply with these instructions may result in electric shock, fire, serious injury, or death.
- Always disconnect the main power supply before working on electrical circuits.
- Ensure proper earthing of the electrical system.
- Do not use the device if it appears damaged.
- Verify correct wiring connections before restoring power.
- Regularly test the RCD as instructed in this manual.
3. Product Overview

Figure 1: Hager CFC225P Residual Current Device.
This image shows the Hager CFC225P Residual Current Device. It is a compact, white electrical module designed for DIN rail mounting, featuring screw terminals for wiring connections at the top and bottom. The front panel clearly displays the model number 'CFC 225P', the brand 'hager', and key electrical ratings '25 A / IΔn 0,3 A', indicating a rated current of 25 Amperes and a residual operating current of 300 milliamperes. A prominent blue test button, marked with a 'T', is visible, along with a grey toggle switch for manual operation (ON/OFF). A small green indicator window is present below the model number, indicating the device's status. A clear plastic cover protects the lower part of the switch mechanism. Markings 'N' and '3' are visible near the top terminals, and 'N' and '4' near the bottom terminals, indicating neutral and phase connections respectively, essential for correct wiring.
The CFC225P is a 2-pole, Type AC RCD, suitable for detecting sinusoidal alternating residual currents. It is designed for use in domestic, commercial, and industrial installations to provide protection against indirect contact and additional protection against direct contact.
4. Setup and Installation
4.1 Pre-installation Checks
- Ensure the RCD rating (25A, 300mA) is appropriate for the circuit it will protect.
- Verify that the main power supply to the distribution board is isolated.
- Confirm that the installation environment is dry and free from excessive dust or corrosive substances.
4.2 Mounting
The Hager CFC225P is designed for mounting on a standard 35mm DIN rail within an electrical enclosure or consumer unit. Simply clip the device onto the DIN rail until it is securely seated.
4.3 Wiring
Refer to the wiring diagram on the device and ensure correct polarity. The terminals are clearly marked:
- Input Terminals (Top): Connect the incoming phase (L) and neutral (N) conductors to terminals 3 and N respectively.
- Output Terminals (Bottom): Connect the outgoing phase (L) and neutral (N) conductors to terminals 4 and N respectively.
- Ensure all connections are tight and secure to prevent loose contacts and overheating. Use appropriate cable sizes for the rated current.
5. Operating Instructions
5.1 Switching On/Off
- To switch the RCD ON, push the toggle switch upwards. The indicator window should show green.
- To switch the RCD OFF, push the toggle switch downwards. The indicator window should show red or be blank.
- If the RCD trips due to an earth fault, the toggle switch will move to the OFF position.
5.2 Test Function
The RCD is equipped with a test button to verify its operational integrity. This test should be performed regularly to ensure the device is functioning correctly.
- With the RCD in the ON position, press the blue 'T' (Test) button.
- The RCD should immediately trip to the OFF position.
- If the RCD does not trip, it indicates a malfunction. Do not use the device and consult a qualified electrician.
- To reset, push the toggle switch fully down, then push it back up to the ON position.
6. Maintenance
The Hager CFC225P RCD requires minimal maintenance. However, regular checks are crucial for continued safety.
- Regular Testing: Perform the test button operation (Section 5.2) at least quarterly, or as recommended by local regulations.
- Visual Inspection: Periodically inspect the device for any signs of physical damage, discoloration, or loose connections.
- Cleaning: If necessary, gently wipe the exterior of the device with a dry, soft cloth. Do not use abrasive cleaners or solvents. Ensure power is off before cleaning.
7. Troubleshooting
If your RCD trips frequently or fails to operate correctly, consider the following:
| Problem | Possible Cause | Solution |
|---|---|---|
| RCD trips frequently. | Earth fault in connected appliance/circuit; faulty appliance; dampness; insulation breakdown. | Disconnect all appliances from the circuit. Reset the RCD. If it holds, reconnect appliances one by one to identify the faulty one. Check for dampness or damaged wiring. Consult an electrician if the issue persists. |
| RCD does not trip when test button is pressed. | Internal fault in the RCD; no power to the RCD. | Ensure power is supplied to the RCD. If power is present and it still doesn't trip, the RCD is faulty and must be replaced by a qualified electrician. |
| RCD cannot be switched ON. | Persistent earth fault; RCD is already tripped and needs full reset; internal damage. | Ensure the toggle switch is pushed fully down before attempting to switch ON. Check for persistent earth faults in the circuit. If the problem persists, consult a qualified electrician. |
If you are unable to resolve an issue, always contact a qualified electrician for assistance. Do not attempt repairs yourself.
8. Specifications
| Parameter | Value |
|---|---|
| Model | CFC225P |
| Brand | Hager |
| Type | AC (Alternating Current) |
| Poles | 2P (2-Pole) |
| Rated Current (In) | 25 A |
| Rated Residual Operating Current (IΔn) | 300 mA (0.3 A) |
| Rated Voltage (Ue) | 230/400 V AC |
| Mounting | DIN Rail (35mm) |
| Standard | EN 61008-1 |
| ASIN | B07Y6S71G5 |
| Date First Available | 23 Sept. 2019 |
| Manufacturer | HAGER |
| Country of Origin | France |
| Barcode (EAN) | 3250611613237 |
9. Warranty
Hager products are manufactured to high standards and come with a manufacturer's warranty against defects in materials and workmanship. The specific terms and duration of the warranty may vary by region and product type. Please refer to the official Hager website or contact your local Hager distributor for detailed warranty information.
10. Support
For technical assistance, product inquiries, or support, please visit the official Hager website or contact their customer service department. Contact details can typically be found on the Hager website under 'Contact Us' or 'Support'.
Hager Group Official Website: www.hager.com





