Legrand 402024 RCD RX³ 2P 25A 30mA Type AC DIN Rail

The Legrand 402024 (catalog reference 4 020 24) is an RX³ residual current device (RCD), 2-pole, rated 25 A with 30 mA AC-type sensitivity for 230 V~ installations. It occupies 2 modules on a DIN rail and conforms to IEC 61008-1, providing personal protection from direct and indirect contact along with insulation-fault protection.

Technical specifications:

• Catalog reference: 402024
• Manufacturer: Legrand
• EAN: 3245064020244
• Product type: RX³ RCD (residual current device)
• Number of poles: 2
• Rated voltage: 230 V~ (operating range 180-250 V~)
• Rated current (In): 25 A
• Rated residual current (IΔn): 30 mA (0.03 A)
• Residual current type: AC
• Frequency: 50 Hz
• Rated insulation voltage (Ui): 250 V
• Rated impulse withstand voltage (Uimp): 4 kV
• Short-circuit conditional capacity (Icw): 10 kA
• Surge current capacity: 0.25 kA
• Width: 2 modules / 35.6 mm
• Height: 88.9 mm; depth: 77.8 mm; built-in depth: 44 mm
• Mounting: DIN rail
• Connection: screw terminals; busbar and cable compatible
• Cable cross-section: 0.75 to 50 mm² solid-core, 0.75 to 35 mm² multi-wired
• Degree of protection: IP20
• Impact resistance: IK04
• Colour: Grey (RAL 7035)
• Ambient temperature (operating): -25 to +60 °C
• Storage temperature: -40 to +70 °C
• Pollution degree: 2
• Halogen-free
• Standard: IEC 61008-1

Features and benefits:

• RX³ entry-level RCD line provides cost-effective 30 mA personal protection for residential and light commercial circuits.
• Interlocking device supports lockout/tagout procedures during maintenance.
• Bidirectional supply allows the device to be wired from the top or bottom of the enclosure.
• Halogen-free construction reduces toxic emissions in the event of fire.
• Busbar and screw-terminal compatibility speeds up distribution-board assembly.

Applications:

• Residential distribution boards requiring 30 mA residual-current personal protection.
• Insulation-fault protection for lighting circuits, socket outlets, and general-purpose feeders up to 25 A.
• Selective coordination with upstream protective devices in TT and TN-S supply systems.
• DIN rail enclosures specifying a 2-module-wide 25 A entry-level RCD.

Also known as: Legrand 402024, RX³ RCD 2P 25A 30mA Type AC, 4 020 24.