Residual-current device (RCD) EATON xPole Home HNC-40/4/003 4P 40A 30mA Type AC

EATON xPole Home HNC-40/4/003 is a 4-pole residual-current device designed for residential and small commercial electrical installations. It provides current-sensitive protection with a rated current of 40 A and a trip threshold of 30 mA (0.03 A), detecting alternating (AC) leakage currents. The device interrupts supply when an imbalance between live and neutral conductors indicates a leakage to earth, reducing the risk of electric shock and lowering fire risk caused by earth faults. The compact 4P design allows protection of three-phase circuits including neutral.

Advantages

The RCD offers fast and reliable residual current detection for AC leakage, with a well-defined 30 mA sensitivity suitable for personal protection and enhanced fire prevention. Its 4-pole configuration enables use in three-phase systems with neutral, while the 40 A rating supports common residential and light commercial load levels. The Eaton xPole Home series is engineered to fit standard DIN-rail distribution boards and provides consistent trip performance under specified conditions.

Suitable for

• Residential main distribution boards with three-phase supply and neutral
• Small commercial premises requiring 30 mA personal protection
• Protecting circuits with a rated current up to 40 A in three-phase installations
• Applications where AC-type residual current detection is sufficient

Key specifications

• Poles: 4-pole (suitable for three-phase with neutral)
• Rated current: 40 A
• Residual operating current: 30 mA (0.03 A)
• Type: AC (detects alternating residual currents)
• Function: Trips on imbalance between live and neutral conductors to interrupt supply
• Mounting: DIN-rail compatible enclosure for distribution boards

How to use

Install the RCD in the distribution board on a compatible DIN-rail and wire the three phase conductors and neutral through the device according to local wiring standards and regulations. Ensure the supply is turned off before installation and perform connections using appropriately rated wiring and torque settings as specified by installation codes. After installation, test the device using the built-in test button or a suitable RCD tester to confirm correct trip operation at rated sensitivity.

Usage recommendations

Use this 30 mA AC-type RCD where protection against AC leakage currents is adequate; consider different RCD types if DC or pulsating residual currents may be present. Regularly test the RCD (monthly or as required by local rules) and inspect the installation periodically to ensure reliable operation.