Doepke DFS4 040-4/0.30-A R Residual Current Circuit Breaker, 4-Pole, 40 A, 300 mA, Type A 9136911

The Doepke DFS4 040-4/0.30-A R stands out among residual current circuit breakers with its robust 4-pole design and 40 A rating, delivering reliable protection for three-phase installations where high current capacity and dependable fault detection are non-negotiable. Engineered for DIN rail mounting, this Type A RCCB responds to both AC and pulsating DC residual currents, making it a versatile safeguard for modern electrical systems.

Highlights

• 4-pole configuration for three-phase networks
• Rated current of 40 A and residual current sensitivity of 300 mA
• Type A tripping: detects AC and pulsating DC fault currents
• Compact 4-module width (70 mm) saves space on the DIN rail
• High short-circuit withstand rating of 10 kA
• Screw terminals accommodate conductors up to 50 mm² solid

In daily use

Installation is straightforward thanks to the standard DIN rail mount and clearly marked screw terminals. The device operates reliably across a wide temperature range from -25 °C to +40 °C, ensuring consistent performance in demanding environments. With an IP40 degree of protection when installed, it is suited for distribution boards in residential, commercial, and light industrial settings. The 300 mA residual current rating provides fire protection and equipment safety without nuisance tripping, while the 40 A rating supports substantial loads.

Full specifications

• Brand: Doepke
• Model: DFS4 040-4/0.30-A R
• MPN: 9136911
• EAN: 4014712113183
• Number of poles: 4
• Rated current (In): 40 A
• Rated residual current (IΔn): 300 mA
• Residual current type: A
• Rated voltage: 230/400 V AC
• Rated frequency: 50/60 Hz
• Mounting type: DIN rail (EN 60715)
• Conditional rated short-circuit current: 10 kA
• Rated impulse withstand voltage: 4 kV
• Rated insulation voltage: 500 V
• Surge current resistance: 3 kA
• Degree of protection (installed): IP40
• Width in modular spacings: 4 TE (70 mm)
• Connection type: screw terminals
• Max. conductor cross-section solid: 50 mm²
• Max. conductor cross-section flexible: 35 mm²
• Ambient temperature range: -25 °C to +40 °C

Final note

Doepke's DFS4 series is trusted by professionals for its precision and durability. This RCCB combines essential protection with ease of installation, making it a smart choice for any three-phase electrical distribution system.