Hager CFC441J RCCB 40A 4-Pole 300mA Type AC (ELCB)
The Hager CFC441J is a 4-pole residual current circuit breaker (RCCB/ELCB) rated 40 A with 300 mA sensitivity, built for earth-leakage protection on larger residential, commercial, and light industrial distribution boards. Manufactured in France, it disconnects the circuit quickly on detecting a leakage fault, protecting connected equipment and reducing fire risk from earth faults. Type AC sensing suits standard AC installations.
Key Features
- 4-pole (3P+N) RCCB for 3-phase, 4-wire distribution circuits
- Rated current: 40 A
- Sensitivity (rated residual operating current): 300 mA, Type AC
- Rated conditional short-circuit current (Inc): 6 kA per EN 61008-1
- Breaking capacity (Idm): 1.5 kA
- Compact 4-module DIN rail enclosure (70 mm wide)
- Rated insulation voltage 500 V, impulse withstand 4,000 V
- Complies with IEC/EN 61008-1
Technical Specifications
| Specification |
Details |
| Model |
CFC441J |
| Rated Current (In) |
40 A |
| Poles |
4P (3P+N) |
| Rated Residual Operating Current (Idn) |
300 mA |
| Type |
AC |
| Rated Voltage |
240/415 V AC |
| Frequency |
50 Hz |
| Breaking Capacity (Idm) |
1.5 kA |
| Rated Conditional Short-Circuit Current (Inc) |
6 kA (per EN 61008-1) |
| Rated Insulation Voltage |
500 V |
| Impulse Withstand Voltage |
4,000 V |
| IP Rating |
IP20 |
| Mounting |
DIN rail, 4 modules (70 mm) |
| Dimensions (H x W x D) |
83 x 70 x 70 mm |
| Terminal Capacity |
1–25 mm² solid / 1–16 mm² flexible |
| Operating Temperature |
-25°C to 70°C |
| Standard |
IEC/EN 61008-1 |
| Country of Origin |
Made in France |
Applications
- Residential apartment blocks and villas with 3-phase supply
- Commercial buildings — offices, schools, hospitals, retail
- Industrial distribution boards and sub-panels
- Circuits requiring 300 mA fire/equipment-protection level sensitivity
FAQ
-
What's the difference between an MCB and an RCCB/RCD?
An MCB (miniature circuit breaker) protects against overload and short-circuit currents. An RCCB (residual current circuit breaker), also called an ELCB, monitors the balance of current between line and neutral conductors and disconnects the circuit when it detects earth leakage — protecting against electric shock and fire from insulation faults. The two devices protect against different fault types and are typically installed together on a distribution board.
-
What does the 300 mA sensitivity rating mean?
300 mA is a higher-threshold sensitivity generally used for fire and equipment protection on larger distribution circuits, rather than direct personnel protection (which typically uses 30 mA devices). It trips on the larger leakage currents typical of insulation faults or equipment failure, reducing fire risk on sub-mains and distribution boards.
-
What does 4-pole mean and do I need it for this circuit?
A 4-pole (3P+N) RCCB switches all three phase conductors and the neutral together. It's used on 3-phase, 4-wire circuits — typically main incomers or distribution boards feeding 3-phase loads — so both phase and neutral are isolated together on a leakage trip.
-
Can I install this myself?
No. This is a distribution board component that must be installed and connected by a licensed electrician in accordance with local wiring regulations. Incorrect installation of an RCCB can leave circuits without leakage protection.
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Will this fit a standard Hager distribution board?
Yes. The CFC441J is part of Hager's modular DIN-rail range and installs alongside Hager MCBs, isolators, and other DB accessories in a standard Hager consumer unit or distribution board.
