Doepke DFS 4 063-4/0,30-A Residual Current Circuit Breaker Type A 63A 300mA 4-Pole 09146901

Electrical installations require reliable protection against dangerous residual currents that can cause electric shocks or fires. The Doepke DFS 4 063-4/0,30-A is a 4-pole residual current circuit breaker (RCCB) of Type A, engineered to detect and interrupt alternating and pulsating direct residual currents up to 300 mA. With a rated current of 63 A and a voltage rating of 230/400 V AC, it is suited for three-phase systems in commercial and industrial environments where robust protection and minimal downtime are essential.

Who is it for

This device is intended for electricians, panel builders, and facility managers who need a dependable RCCB for distribution boards, sub-distribution units, and machinery circuits. It is particularly valuable in installations with electronic loads that can produce pulsating DC residual currents, such as frequency converters, UPS systems, or LED lighting arrays. The 63 A rating supports high-load circuits, while the 300 mA sensitivity provides fire protection and equipment safety without nuisance tripping.

Main features

• Type A RCCB: detects AC and pulsating DC residual currents, suitable for modern electronic loads.
• 4-pole design for three-phase networks with neutral, ensuring complete isolation on fault.
• Rated residual current of 300 mA, ideal for fire prevention and protection of large installations.
• Rated current of 63 A, handling substantial continuous loads.
• Short-circuit withstand capacity of 10 kA with appropriate backup fuse, ensuring safety under fault conditions.
• Compact 4-module width (72 mm) for space-saving DIN rail mounting.
• IP20 protection at terminals, IP40 when installed, suitable for distribution boards.
• Wide operating temperature range from -25 °C to +40 °C for demanding environments.

Specifications

• Product type: Residual Current Circuit Breaker (RCCB)
• RCD type: Type A
• Rated current (In): 63 A
• Rated residual current (IΔn): 300 mA
• Number of poles: 4
• Rated voltage (Un): 230/400 V AC
• Rated frequency: 50/60 Hz
• Short-circuit withstand capacity (Inc): 10 kA
• Rated switching capacity (IΔm): 500 A
• Mounting type: DIN rail (EN 60715)
• Module width: 4 modules (72 mm)
• Degree of protection: IP20 (terminals), IP40 (installed)
• Operating temperature: -25 °C to +40 °C
• Terminal type: screw terminals
• Terminal capacity: 1.5 - 50 mm² (solid/stranded)
• Mechanical life: 10,000 switching cycles
• Electrical life: 2,500 switching cycles
• Tripping characteristic: instantaneous
• Standards: EN 61008
• Surge current withstand: 3 kA

Tips

Always verify that the upstream overcurrent protection is coordinated with the RCCB's short-circuit withstand rating. For installations with high inrush currents, consider the surge current withstand of 3 kA to avoid unwanted tripping. Mount the device in a dry, enclosed distribution board to maintain the IP40 protection level. Regularly test the RCCB using the built-in test button to ensure proper operation.