KOOP Elektro FSS Residual Current Circuit Breaker 4P 40A 30mA Type A

The KOOP Elektro FSS 4P 40A 30mA Type A is a high-quality residual current circuit breaker (RCCB) engineered to enhance electrical safety in various environments. This 4-pole device is designed to monitor electrical circuits and automatically disconnect power when a leakage current is detected, thereby preventing potential electric shock hazards and protecting equipment from ground faults.

Advantages

This circuit breaker offers reliable protection by identifying both alternating current (AC) and pulsating direct current (DC) residual currents, which is a critical feature for modern electrical systems containing electronic components. Its robust construction ensures long-term durability and consistent performance in both residential and industrial settings. By maintaining a 30mA sensitivity threshold, it provides an optimal balance between safety and operational continuity, minimizing nuisance tripping while ensuring rapid response to dangerous leakage currents.

Suitable for

• Residential electrical distribution boards
• Industrial machinery and equipment protection
• Commercial building electrical installations
• Systems with electronic power supplies or frequency converters

This device may not be suitable for high-current industrial applications exceeding its 40A rated capacity. It is also not intended to provide protection against short-circuits or overloads, as it must be paired with a miniature circuit breaker (MCB) or fuse to ensure comprehensive electrical system protection.

Key specifications

• Number of poles: 4
• Rated current: 40A
• Residual current sensitivity: 30mA
• Type: A (AC and pulsating DC detection)

Installation should be performed by a qualified electrician in accordance with local electrical regulations. The device is typically mounted on a standard DIN rail within a distribution cabinet. Ensure that the supply voltage matches the device specifications and that all connections are tightened to the recommended torque to prevent overheating.

What to consider before purchase

• Verify that the 40A rating is sufficient for your circuit load
• Ensure the 30mA sensitivity meets your specific safety requirements
• Confirm compatibility with your existing distribution board layout
• Check if Type A protection is required for your specific electronic equipment

For optimal safety, test the residual current circuit breaker periodically using the integrated test button to ensure the mechanical tripping mechanism remains functional.