Schneider Electric Acti 9 iID 2P 40A 30mA AC Type Residual Current Circuit Breaker (RCCB)

For installations where dependable earth leakage protection is non-negotiable, the Schneider Electric A9Z05240 stands apart with its AC-type residual current detection and 30 mA sensitivity — the exact combination required for a wide range of residential and commercial circuits. Part of the Acti 9 range, this 2-pole RCCB combines compact 4-module width with robust performance, making it a straightforward upgrade for distribution boards that demand both safety and space efficiency.

Highlights

• Rated current of 40 A with 30 mA residual operating current (AC type)
• 2-pole design, 230/240 V AC, 50/60 Hz — ideal for single-phase networks
• DIN rail mounting with tunnel terminals and 3.5 N·m tightening torque
• IP20 protection (IP40 when installed in an enclosure)
• Complies with EN/IEC 61008-1 for residual current protection

In daily use

Installation is quick thanks to the standard DIN rail format and clearly marked tunnel terminals. Once in place, the iID RCCB continuously monitors for earth leakage currents and disconnects the circuit within milliseconds when a fault is detected, protecting both people and equipment. Its AC-type response is suited to circuits with resistive, capacitive, or inductive loads that do not produce DC leakage, covering most general-purpose applications.

Full specifications

• Brand: Schneider Electric
• Model: A9Z05240
• Product type: Residual Current Circuit Breaker (RCCB)
• Range: Acti 9
• Device short name: iID
• Poles: 2P
• Rated current (In): 40 A
• Rated residual operating current (IΔn): 30 mA
• Residual current type: AC
• Network type: AC
• Rated operational voltage (Ue): 230/240 V AC, 50/60 Hz
• Rated insulation voltage (Ui): 500 V
• Rated impulse withstand voltage (Uimp): 6 kV
• Mounting mode: DIN rail
• Width in 9 mm pitches: 4
• Connection type: Tunnel type terminals
• Tightening torque: 3.5 N·m
• Degree of protection: IP20 (IP40 in enclosure)
• Pollution degree: 3
• Operating temperature: -5 to 60 °C
• Standards: EN/IEC 61008-1

Final note

With its proven Acti 9 engineering and precise 30 mA trip threshold, the A9Z05240 delivers the peace of mind that comes from knowing your circuits are guarded against dangerous earth faults — without taking up unnecessary space in the enclosure.