Residual-current circuit breaker Schneider Electric 4P 63A 30mA Type AC model A9Z05463

Schneider Electric residual-current circuit breaker 4P 63A 30mA Type AC model A9Z05463 is a four-pole RCD designed to detect alternating residual currents and disconnect supply to reduce the risk of electric shock and electrical fire. The device provides earth-fault protection for TN and TT systems and is suitable for use in residential, commercial and light industrial distribution boards where 4-pole protection and 63 A rated current are required.

Advantages

This 4-pole RCD offers reliable detection of alternating residual currents with a rated residual operating current of 30 mA, delivering human-protection sensitivity while allowing a 63 A continuous load. The Type AC characteristic ensures correct response to sinusoidal alternating leakage currents. The Schneider Electric design supports standard DIN-rail mounting and integration into modular distribution systems, providing consistent mechanical compatibility and clear labeling for straightforward installation and maintenance.

Suitable for

• Earth-fault protection in residential distribution boards with three-phase supplies and neutral
• Protecting small commercial premises and shops requiring 4-pole residual-current protection
• Light industrial installations where AC-type leakage detection is acceptable
• Applications needing 63 A rated current and 30 mA residual sensitivity

Key specifications

• Number of poles: 4
• Rated current: 63 A
• Residual operating current (sensitivity): 30 mA (0.03 A)
• Tripping characteristic: Type AC (responds to sinusoidal alternating residual currents)
• Intended mounting: DIN-rail modular distribution panel
• Application: earth-fault / residual-current protection for TN and TT systems

How to use

Mount the residual-current circuit breaker on a standard DIN rail inside the distribution board and connect the incoming and outgoing conductors according to the system schematic, ensuring correct phasing for all four poles. Verify that the device is accessible for operation and maintenance and that protective covers are fitted where required. After wiring, perform an insulation and continuity check, then apply mains power and test the RCD using the built-in test button or a suitable RCD test instrument to confirm correct trip at the specified residual current.

Usage recommendations

For reliable protection, test the device regularly using the test button or an approved tester and follow local electrical regulations for periodic inspection. Use this Type AC RCD where leakage currents are predominantly sinusoidal; if electronic equipment or DC components are present, consider using an RCD with a different tripping characteristic. Installation and verification should be performed by a qualified electrician in accordance with applicable standards.