Surge arrester insert Legrand B+C 8 kA 320 V, model 412302

Legrand surge arrester insert B+C 8 kA 320 V model 412302 is a compact protective module designed to reduce transient overvoltages in low-voltage electrical installations. Intended for installation in modular distribution boards, this insert combines Class B and Class C protection levels to limit high-energy surges and residual overvoltages, helping to protect connected equipment from lightning-induced and switching transients while maintaining compatibility with standard DIN-rail mounting systems.

Advantages

The module provides combined B+C protection in a single insert, offering a balance between high-energy surge handling and downstream voltage limitation. With a nominal discharge current capacity of up to 8 kA, it addresses typical surge events in residential and commercial supply networks. Its compact, modular form factor allows straightforward integration into existing distribution boards without requiring extra enclosure space or complex wiring changes.

Suitable for

Key specifications

How to use

Mount the surge arrester insert in a compatible modular distribution board according to local electrical regulations and the distribution board manufacturer’s instructions. Ensure the device is installed at the service entrance or upstream of the circuits and loads you intend to protect to maximize effectiveness. Make proper electrical connections to the line and neutral (and earth where required) following wiring diagrams and tighten terminal connections to the recommended torque. Verify the protective device is accessible for inspection and replacement if necessary.

Recommendations

Use this combined B+C insert as part of a coordinated surge protection arrangement: place primary surge protection at the incoming supply and supplementary devices downstream where required. Periodically inspect the module and associated protective devices after severe surge events and follow local codes for earthing and bonding to ensure reliable operation.