Residual current circuit breaker type G/Bfq 4-pole FRCdM-40/4/03-G/Bfq 167905

Residual Current Device – Safety and Installation Protection

This four-pole residual current device (RCD) type G/Bfq is a key element ensuring safety in electrical installations. Designed to protect people from electric shock and to protect against the effects of short circuits and overloads, it finds application in both domestic and industrial installations. The FRCdM-40/4/03-G/Bfq model is characterized by high efficiency and reliability, confirmed by numerous certificates and compliance with standards.

Characteristics and application

This circuit breaker, with a rated current of 40A and a sensitivity of 0.3A, is particularly recommended for use in circuits powering devices with high starting power, such as motors or pumps. Characteristic C allows it to react more slowly to short current surges, so it tolerates starting motors well. Type G/Bfq provides protection against alternating and direct leakage currents, which is important in modern installations equipped with inverters or impulse power supplies. A width of 4 modules makes it easy to install in standard distribution boards.

Key features and benefits

• High resistance to interference: Thanks to type G/Bfq, the circuit breaker is resistant to interference generated by electronic devices, minimizing the risk of false tripping.
• Wide range of applications: Suitable for protecting circuits with a conductor cross-section from 1.5 mm² to 35 mm², both solid and stranded.
• Selective protection: The possibility of selective protection allows for precise disconnection of the damaged circuit without disconnecting the entire installation.
• Locking: The integrated lock prevents accidental switching on of the circuit breaker after it has been switched off by a differential current – additional protection for the user.
• Durable construction: Made of high-quality materials, it ensures long-lasting and reliable operation even in difficult environmental conditions (operating temperature from -25°C to 50°C).
• DIN rail mounting: Standard DIN rail mounting ensures quick and easy installation.
• High short-circuit strength: Withstands short circuits with a current of up to 10 kA, protecting the installation from serious damage.
• Compliance with standards: Meets the requirements of IEC/EN 61008 and IEC/EN 62423 standards, guaranteeing safety of use.

Technical parameters in practice

The FRCdM-40/4/03-G/Bfq circuit breaker has a rated voltage of 415V AC and a rated impulse withstand voltage Uimp of 4kV. Its short-circuit breaking capacity is 10kA, and its impulse withstand current is 3kA – these values testify to the high reliability of the device in emergency situations. The IP20 protection degree provides protection against touching with fingers, as well as against the ingress of solid objects larger than 12mm into the device. Remember to select the correct conductor cross-sections (1.5-35mm² for solid and 1.5-16mm² for stranded) to ensure optimal operation of the circuit breaker and installation safety.