Surge arrester T2 20 KA 3P+N 412227

Surge protection for your installation

The Legrand ON300 series T2 surge protector 3P+N is a reliable safety element protecting the electrical installation from the effects of lightning strikes and surges. Designed for mounting in distribution boards, it effectively protects electrical and electronic devices from damage. This is particularly important in areas prone to frequent atmospheric discharges or in buildings connected to an unstable voltage network.

Functionality and application

This surge protector, with a width of 4 modules, is designed to operate in TN, TT, TNC and TN-C-S networks. It provides L-N protection at 1.2 kV and N-PE protection at 1.5 kV. Its task is to limit the voltage to a safe level during a surge, minimizing the risk of failure and extending the life of connected devices. Optical signaling informs about the need to replace the insert after the surge protector has operated.

Key features and benefits

• High efficiency: Rated discharge current of 5 kA (8/20 µs) and the ability to withstand 20 kA impulses (pole), guarantee effective protection against surges.
• Versatility: The ability to use in various network configurations (TN, TT, TNC, TN-C-S) makes the surge protector compatible with most electrical installations.
• Easy installation: Mounting on a TH-35 mm DIN rail is quick and intuitive, making it easier for installers.
• Replaceable insert: Replaceable insert with status indicator (green – working, orange – to be replaced) allows for easy diagnostics and quick replacement of the damaged element without the need to replace the entire surge protector.
• Safety: Compliance with IEC/EN 61643-11 standard ensures a high level of safety and reliability.
• Large diameter wires: Support for wires with a cross-section of up to 35 mm² (stranded) and 25 mm² (flexible) ensures compatibility with most wiring used in residential and commercial buildings.
• Compact dimensions: A width of 4 modules allows for easy placement of the surge protector in a standard electrical distribution board.