Chint NL1-63-425/30 residual current circuit breaker, a 25A 4 pole 30mA AC type RCCB designed for earth leakage and residual current protection in low voltage three-phase electrical installations.
£76.51
The Chint NL1-63-425/30 is a reliable residual current circuit breaker designed to provide earth leakage protection in low voltage electrical installations. As part of the Chint NL1-63 RCCB series, it detects residual current faults and disconnects the circuit when leakage current is present, helping improve electrical safety in commercial, industrial and three-phase distribution systems.
Designed for use in distribution boards and control panels, this RCCB helps protect against electric shock and fire risk caused by insulation faults or earth leakage. Its compact DIN rail mounted construction makes it easy to install, while its dependable tripping performance supports safe operation across a wide range of electrical installations.
With a 25A rated current, 4 pole configuration, 30mA residual current sensitivity and AC type operation, the NL1-63-425/30 is ideal for three-phase circuits requiring additional protection against residual current faults.
Residual current circuit breakers monitor the current flowing through live and neutral conductors. If an imbalance is detected, caused by leakage to earth, the RCCB trips and disconnects the circuit to help reduce the risk of electric shock and electrical fire.
The Chint NL1-63 series is widely used in commercial premises, industrial panels and three-phase distribution systems. Its compact design allows straightforward integration into modern distribution boards, while its reliable residual current protection helps support safer electrical systems.
| Current | 25 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | Chint |
| Series | NL1-63 |
| Model | NL1-63-425/30 |
| Product type | Residual Current Circuit Breaker |
| Device type | RCCB / RCD |
| Rated current | 25A |
| Number of poles | 4 Pole |
| Rated residual operating current | 30mA |
| RCD type | AC Type |
| Rated voltage | 400 / 415V AC |
| Frequency | 50 / 60Hz |
| Standard | IEC/EN 61008-1 |
| Mounting type | DIN rail mounting |
| Application | Residual current and earth leakage protection |
It is used to provide residual current and earth leakage protection in low voltage three-phase electrical installations.
The NL1-63-425/30 has a rated current of 25A.
The 30mA rating refers to the residual operating current sensitivity, meaning the device is designed to trip when earth leakage reaches approximately 30mA.
AC type means the device is designed to detect sinusoidal alternating residual currents commonly found in standard AC circuits.
No. An RCCB provides residual current protection only and should be used with suitable overcurrent protection such as an MCB or fuse.
Chint NL1-63 RCCBs are trusted by electricians, panel builders and contractors for reliable residual current protection, compact installation and dependable performance in low voltage distribution systems.
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2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...