Eaton FRCDM-40/4/003-G/B Digital Type B RCD 40A 4-Pole 30mA 230/400V AC DIN Rail

In industrial plants and commercial buildings, protecting personnel and equipment from residual currents demands a device that responds to both AC and pulsating DC faults. The Eaton FRCDM-40/4/003-G/B digital residual current device (RCD) meets this challenge with a rated current of 40 A, four poles, and a sensitivity of 30 mA. Its Type B classification ensures detection of smooth DC residual currents, making it suitable for circuits with frequency converters, UPS systems, or charging infrastructure. The digital functionality provides enhanced test and status indication, simplifying maintenance and verification.

Key specifications

• Rated current: 40 A
• Number of poles: 4
• Rated residual current: 30 mA
• RCD type: B (all-current sensitive)
• Rated voltage: 230/400 V AC
• Rated frequency: 50/60 Hz
• Short-circuit withstand capacity: 10 kA
• Rated impulse withstand voltage: 4 kV
• Mounting: DIN rail
• Module width: 4 modules (approx. 70 mm)
• Terminal capacity: 1.5–35 mm²
• Degree of protection: IP20 (terminals), IP40 (with enclosure)
• Operating temperature: -25 to +60 °C
• Standards: IEC/EN 61008-1, VDE 0664 Part 10
• Electrical endurance: >10,000 cycles
• Mechanical endurance: >20,000 cycles
• Surge current withstand: 3 kA (8/20 µs)

Why choose it

Type B sensitivity covers residual currents that standard AC or A types miss, reducing the risk of undetected faults in modern electrical installations. The digital status indication and test function streamline routine checks, while the robust construction and wide temperature range ensure reliable operation in demanding environments.

Ideal use cases

• Circuits with frequency converters or variable speed drives
• UPS systems and battery storage installations
• Electric vehicle charging infrastructure
• Industrial machinery with three-phase power

Good to know

The device features instantaneous tripping and a high short-circuit withstand capacity, making it suitable for use as a main switch in distribution boards. Its compact 4-module width saves space on the DIN rail, and the digital interface allows for easy status monitoring and testing.