Pronto Energy 
KNL5-125 Residual Current Circuit Breaker (RCCB)
The KNL5-125 4P 63-100A residual current circuit breaker provides earth-leakage protection for AC installations, tripping within 0.1 seconds to reduce electric-shock and fire risk. Compliant with IEC/EN 61008, it suits residential, commercial and industrial distribution boards.
Applications & circuit protection
The KNL5-125 RCCB protects people and equipment from earth-leakage faults. It is ideal for final distribution circuits in homes, commercial buildings and industrial facilities.
- Earth-leakage protection for final circuits
- Residential and commercial distribution boards
- Industrial installations requiring high sensitivity
- Protection against indirect contact and fire risk
Construction & operating reliability
The KNL5-125 features a highly sensitive residual-current sensing mechanism with reliable silver-alloy contacts and a flame-retardant PA66 housing that withstands a 960°C glow-wire test.
- Fast trip within 0.1 seconds
- Reliable silver-alloy contacts
- Flame-retardant PA66 housing
- Tool-free 35mm DIN rail mounting
Wiring Diagram
Technical Parameter
| Parameter | Value |
| Compliant with standards | IEC/EN 61008-1 |
| Application | Residual-current protection in AC electrical circuits |
| Number of product poles | 4P |
| Rated working current | 63–100A |
| Rated working voltage | 240/415 V AC (230/400 V AC) |
| Rated frequency | 50/60 Hz |
| Residual-current type | Type A / Type AC / Type B |
| Rated residual operating current | 30 / 100 / 300 / 500 mA |
| Short-circuit capacity | 10 kA |
| Maximum trip time | ≤0.1 s |
| Installation method | 35 mm DIN rail |
| Certifications | CB, CE, SEMKO |
Standards & certifications
The KNL5-125 is designed in accordance with IEC/EN 61008-1 and is available with CB, CE, SEMKO certifications. Certification documentation can be provided according to project and destination-market requirements.
- Standard: IEC/EN 61008-1.
- Certifications: CB, CE, SEMKO.
- Protection level: IP20 (where applicable).
OEM & B2B supply support
KORLEN supports distributors, OEM manufacturers, electrical contractors and project buyers with product selection, samples, technical documentation and commercial quotations.
If the KNL5-125 configuration does not match your project, send us the required specifications, quantity and destination market. Our team can help identify a suitable configuration.
- Samples available for product evaluation.
- Flexible quantities for project and B2B purchasing.
- OEM and ODM support for suitable projects.
- Technical documentation and certification support available.
Frequently Asked Questions
The KNL5-125 residual current circuit breaker detects earth-leakage current and disconnects the circuit to reduce electric-shock and fire risk.
The KNL5-125 provides earth-leakage protection suitable for standard AC installations, with Type A, AC and B sensitivity options for different fault signatures.
It is installed on 35mm DIN rail in distribution boards, ahead of the circuits it protects.
The RCCB provides earth-leakage protection. For combined overload and earth-leakage protection, pair it with an MCB or use an RCBO.
