Doepke DFS6 063-4/0,03-B SK NU Residual Current Circuit Breaker 4-Pole 63A 30mA Type B 09144899

Electrical systems with frequency converters, UPS units, or charging stations can produce smooth DC residual currents that standard RCCBs fail to detect, leaving circuits dangerously unprotected. The Doepke DFS6 063-4/0,03-B SK NU is a Type B residual current circuit breaker engineered to monitor AC, pulsating DC, and smooth DC fault currents, ensuring reliable disconnection in modern installations. With a rated current of 63 A and a residual operating current of 30 mA, this 4-pole device safeguards personnel and equipment against earth faults in three-phase networks up to 230/400 V AC.

Who is it for

Electricians and panel builders working on commercial or industrial projects where nonlinear loads are present—such as EV charging infrastructure, photovoltaic systems, or machinery with variable speed drives—will appreciate the robust performance and straightforward DIN rail mounting. It is equally suited for retrofitting older distribution boards that require enhanced protection against DC leakage currents.

Main features

• Type B residual current detection: responds to AC, pulsating DC, and smooth DC residual currents up to 30 mA.
• 63 A rated current and 4-pole configuration for three-phase and neutral circuits.
• Compact 4-module width (72 mm) saves space on DIN rails.
• High short-circuit withstand rating of 10 kA for demanding installations.
• Surge current capability of 3 kA (8/20 µs) reduces nuisance tripping from transient overvoltages.
• Screw terminals accept conductors from 1.5 to 50 mm², ensuring secure connections.
• Wide operating temperature range from -25 °C to +40 °C for harsh environments.
• Complies with EN 61008-1 and VDE 0664-10 standards.

Specifications

• Device type: Residual Current Circuit Breaker (RCCB)
• Number of poles: 4
• Rated current (In): 63 A
• Rated residual current (IΔn): 30 mA
• Residual current type: B
• Rated voltage: 230/400 V AC
• Rated frequency: 50/60 Hz
• Rated short-circuit current (Icn): 10 kA
• Surge current withstand: 3 kA (8/20 µs)
• Mounting: 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 capacity: 1.5 - 50 mm²
• Standards: EN 61008-1, VDE 0664-10

Tips

Always verify that the upstream overcurrent protection is coordinated with the RCCB's rated short-circuit capacity. For installations with high leakage currents, consider using a selective (time-delayed) RCCB upstream. Mount the device in a location with adequate ventilation to maintain the specified operating temperature range.