Isolating switch Legrand RX3 419330 4-pole 40 A

Legrand RX3 419330 is a 4-pole isolating switch rated for 40 A, designed to provide a clear, manual disconnection of electrical circuits. It allows simultaneous switching of all four poles to isolate power for maintenance, testing or emergency shutdowns. The compact size and standardized mounting make it suitable for integration in residential and light commercial distribution boards where a visible and reliable disconnection point is required.

Advantages

The isolating switch offers a simple mechanical operation with positive open indication, ensuring that circuits are visibly and securely disconnected. Its 4-pole design enables full isolation of three-phase systems with neutral conductor. Built with materials and contacts appropriate for 40 A continuous use, the device supports safe manual switching and reduces the risk of accidental re-energization during work. The standardized form factor eases replacement and compatibility with common distribution enclosures.

Suitable for

• Isolation of three-phase and single-phase circuits in residential electrical panels
• Maintenance and servicing of distribution equipment where a visible disconnect is required
• Emergency shutdowns and lock-out procedures in light commercial installations

Key specifications

• Poles: 4-pole configuration for simultaneous switching
• Rated current: 40 A continuous
• Function: Manual isolating (disconnect) switch for circuit separation
• Application: Suitable for three-phase systems with neutral and for single-phase installations
• Mounting: Designed for standard distribution board integration

How to use

Install the isolating switch in accordance with applicable electrical standards and local regulations, ensuring the device is mounted on a compatible DIN rail or within the distribution board provided for such components. Verify supply is disconnected before wiring, then connect conductors to the appropriate terminals for all four poles, tightening to the manufacturer’s torque recommendations. To isolate a circuit, operate the handle to the off position to open all poles simultaneously and confirm the open position is visible. Lock or tag the handle if performing maintenance to prevent unintended reclosure.

Usage recommendations

Use the switch for manual isolation only; do not expose the device to conditions beyond its rated 40 A continuous current. Perform periodic inspections of connections and contact condition, and follow local safety procedures for lockout–tagout when working downstream of the isolator.