Doepke DFS6 040-4/0.03-A NU Residual Current Circuit Breaker (RCCB) 4-Pole 40A 30mA Type A 09134801

With a rated residual current of just 30 mA and a 40 A load capacity across four poles, the Doepke DFS6 040-4/0.03-A NU delivers instant protection against dangerous earth leakage currents in commercial and industrial installations. This Type A RCCB combines high breaking capacity with reliable tripping for personnel and fire protection.

Overview

The DFS6 series residual current circuit breaker is engineered for DIN rail mounting and operates at 230/400 V AC, 50/60 Hz. It detects sinusoidal AC and pulsating DC residual currents, making it suitable for circuits with electronic equipment. The unit features a rated short-circuit current of 10 kA and an impulse withstand voltage of 4 kV, ensuring robust performance under fault conditions.

What stands out

• High 40 A rated current with 30 mA sensitivity for immediate disconnection
• Four-pole design for three-phase and neutral protection
• Type A tripping covers AC and pulsating DC residual currents
• Compact DIN rail housing with IP20 terminals (IP40 when installed)
• Wide operating temperature range from -25 °C to +60 °C
• Surge current withstand capability of 250 A (8/20 µs) prevents nuisance tripping

Technical details

• Number of poles: 4
• Rated current (In): 40 A
• Rated residual current (IΔn): 0.03 A (30 mA)
• Residual current type: A
• Rated voltage: 230/400 V AC
• Rated frequency: 50/60 Hz
• Rated short-circuit current: 10 kA
• Rated impulse withstand voltage: 4 kV
• Mounting: DIN rail (EN 60715)
• Degree of protection: IP20 (terminals), IP40 (installed)
• Operating temperature: -25 °C to +60 °C
• Terminal capacity: 1.5 – 50 mm²
• Surge current withstand: 250 A (8/20 µs)
• Rated switching capacity: 500 A
• Tripping characteristic: Instantaneous
• Electrical life: 10,000 cycles
• Mechanical life: 20,000 cycles
• Standard: EN 61008

Our verdict

The Doepke DFS6 040-4/0.03-A NU is a dependable choice for protecting circuits where both high load currents and sensitive residual current detection are required. Its robust construction and compliance with EN 61008 make it a solid addition to any distribution board.