The Doepke DFS4 063-4/0.30-B SK S is a highly advanced residual current circuit breaker (RCCB) designed for use in single-phase and three-phase networks. This four-pole switch offers a rated current of 63 A and protects people, animals, and electrical installations from hazardous fault currents. With a compact design that occupies only four modular units, the DFS4 is ideal for mounting on DIN rails. The devices are available with various types of fault currents and are characterized by a high response speed as well as improved surge current and lightning resistance. The integrated labeling software allows for easy marking, while the large double-deck terminals are also suitable for larger conductor cross-sections. The switch is particularly optimized for applications where fire protection is not required and provides selective protection, ensuring that only the affected section of the installation is disconnected in the event of a fault.

• All-current sensitive at frequencies from 0 Hz to 150 kHz
• Reduced sensitivity at higher frequencies
• Easy fault diagnosis through the tripped position of the multifunction switch
• Optimized for systems without fire protection requirements
• Suitable for use in tiered distributions for selective protection.