Doepke DFS4 063-4/0.30-A R 63A 4-Pole Type A RCCB with Short-Time Delay, 300mA Residual Current, 230/400V AC 9146911

In commercial and industrial electrical installations, residual current protection must be both reliable and selective. The Doepke DFS4 063-4/0.30-A R is a 4-pole RCCB rated at 63 A with a residual operating current of 300 mA and Type A tripping characteristics. Its short-time delayed (Type R) response prevents nuisance tripping from transient leakage currents, making it ideal for circuits with electronic ballasts, frequency converters, or capacitive loads. This device is commonly installed by electrical contractors in distribution boards of workshops, office buildings, and production facilities where uptime is critical.

Key specifications

• Rated current: 63 A
• Number of poles: 4
• Rated residual current: 300 mA
• RCD type: Type A (AC and pulsating DC)
• Tripping characteristic: short-time delayed (Type R)
• Rated voltage: 230/400 V AC
• Rated frequency: 50/60 Hz
• Conditional rated short-circuit current: 10 kA
• Rated impulse withstand voltage: 4 kV
• Surge current capability: 3 kA (8/20 µs)
• Mounting: DIN rail (EN 60715)
• Module width: 4 modules (72 mm)
• Degree of protection: IP40 (housing), IP20 (terminals)
• Terminal capacity: 1.5–50 mm² solid, 1.5–35 mm² stranded
• Operating temperature: -25 °C to +40 °C
• Mechanical endurance: 10,000 cycles
• Electrical endurance: 2,000 cycles

Why choose it

The Type R short-time delay ensures selectivity with downstream instantaneous RCDs, preventing system-wide shutdowns caused by brief leakage currents. Its robust construction and high surge withstand (3 kA) make it suitable for harsh electrical environments. The 4-module width allows easy integration into standard distribution boards, while the wide terminal range accommodates large conductors, simplifying installation.

Ideal use cases

• Protection of sub-distribution circuits in commercial buildings
• Industrial control panels with frequency converters or UPS systems
• EV charging infrastructure requiring Type A RCDs
• Outdoor installations with high surge exposure
• Retrofit projects where selective coordination is required

Good to know

This RCCB complies with EN 61008-1 and carries the CE mark. It is not suitable for use in DC circuits or for protection against smooth DC residual currents. Always verify local regulations regarding RCD requirements for specific applications. The device should be installed by a qualified electrician and tested regularly using the built-in test button.