Eaton PXF-40/4/03-A Residual Current Circuit Breaker (RCCB), 40 A, 4-Pole, 300 mA, Type A, 230/400 V AC

Electricians and panel builders working on three-phase distribution boards often need a dependable residual current device that can handle higher leakage thresholds without nuisance tripping. The Eaton PXF-40/4/03-A is a 4-pole RCCB rated at 40 A with a 300 mA residual current sensitivity, making it suitable for industrial and commercial installations where equipment with inherent leakage is present. It detects sinusoidal AC residual currents and pulsating DC fault currents (Type A), ensuring protection against dangerous earth faults while minimizing unwanted interruptions.

Key specifications

• Device type: Residual Current Circuit Breaker (RCCB)
• Rated current (In): 40 A
• Number of poles: 4
• Rated residual current (IΔn): 300 mA
• Residual current type: Type A
• Rated voltage: 230/400 V AC
• Frequency: 50/60 Hz
• Mounting: DIN rail
• Conditional short-circuit current: 10 kA (with 63 A gG/gL fuse)
• Rated switching capacity (IΔm): 500 A
• Rated impulse withstand voltage: 4 kV
• Degree of protection: IP20 (terminals), IP40 (installed)
• Operating temperature: -25 to +40 °C
• Terminal capacity: 1.5–35 mm²
• Standards: IEC/EN 61008
• Width: 4 modules
• Test button: Yes

Why choose it

The PXF-40/4/03-A combines robust construction with reliable fault detection. Its 300 mA sensitivity is ideal for circuits with higher leakage currents, preventing unnecessary downtime while still safeguarding against fire risks and electric shock. The Type A classification ensures it responds to both AC and pulsating DC residual currents, a requirement for many modern loads. With a wide operating temperature range and high short-circuit withstand, it is built for demanding environments.

Ideal use cases

• Protection of three-phase circuits in industrial control panels
• Commercial buildings with equipment prone to leakage currents
• Distribution boards requiring 4-pole residual current protection
• Installations where Type A RCCBs are mandated by regulations

Good to know

This RCCB is designed for DIN rail mounting and occupies 4 modules of space. It features a test button for regular functional checks. The device is not suitable for detecting smooth DC residual currents; for such applications, consider Type B RCCBs. Always install according to local wiring regulations and ensure proper coordination with upstream overcurrent protection.