BUSCH-JAEGER Interruttore Differenziale FN440/B30 4P Tipo B 40A 30mA (2CSF704556R1400)

The BUSCH-JAEGER FI-Schutzschalter FN440/B30 is a high-quality residual current circuit breaker (RCCB) designed for reliable protection against electric shock and fire hazards. With 4 poles, Type B sensitivity, rated current 40 A, and rated residual current 30 mA, it is suitable for a wide range of applications including circuits with smooth DC components.

Advantages

Type B sensitivity ensures detection of AC, pulsating DC, and smooth DC residual currents, making it ideal for modern electronic loads. Compact 4-module design saves space on DIN rail. High short-circuit withstand capacity of 10 kA and impulse voltage withstand of 4 kV guarantee robust performance.

Suitable for

• Residential and commercial electrical installations
• Circuits with frequency converters, UPS systems, or EV chargers
• Applications requiring Type B residual current protection

Key specifications

• Product Type: Residual Current Circuit Breaker (RCCB)
• Number of Poles: 4P
• Rated Current (In): 40 A
• Rated Residual Operating Current (IΔn): 30 mA
• Residual Current Type: Type B
• Rated Voltage (Ue): 230/400 V AC
• Rated Frequency: 50/60 Hz
• Mounting: DIN Rail (EN 60715)
• Degree of Protection: IP20 (Terminals)
• Rated Short-Circuit Withstand Capacity (Inc): 10 kA
• Rated Impulse Withstand Voltage (Uimp): 4 kV
• Electrical Endurance: 10000 cycles
• Mechanical Endurance: 20000 cycles
• Terminal Type: Screw Terminals
• Terminal Capacity (Rigid): 35 mm²
• Terminal Capacity (Flexible): 25 mm²
• Operating Temperature: -25 to +55 °C
• Standards: IEC/EN 61008
• Module Width: 4 modules (70 mm)

Recommendations

For comprehensive protection in modern electrical systems, pair this RCCB with a compatible MCB or RCBO. Always consult a qualified electrician for installation.