T1 25 kA surge arrester cartridge 412284

Surge protection for installations – T1 surge arrester insert 25kA

This type T1 surge arrester insert, with a 25kA impulse withstand capability, is a key element in protecting the electrical installation from the effects of lightning strikes and other sudden voltage increases. Designed to work with the ON300 series surge arresters, it provides effective protection in 230/400V networks. Mounting on a TH-35 mm DIN rail makes integration with an existing distribution board simple and intuitive.

Application and design features

The arrester insert is designed for mounting inside Legrand ON300 surge arresters. Its task is to quickly dissipate excess energy generated by a surge, protecting connected devices from damage. The design based on a spark gap ensures high efficiency and long life. An optical indicator informs about the status of the insert – green indicates functionality, red – the need for replacement.

• Type T1 protection: Provides the first line of defense against direct lightning strikes or nearby atmospheric discharges.
• Impulse withstand capability 25kA: Allows for effective dissipation of energy even with strong surges.
• Maximum voltage (Uc) 350V: Corresponds to standard mains voltages, ensuring compatibility with most installations.
• Protection level (Up) 1.5kV: Limits the surge voltage to a safe level for connected devices.
• Status indicator: Facilitates quick identification of a damaged insert and the need for its replacement.
• Mounting on TH-35 mm DIN rail: Standard mounting simplifies installation and replacement in existing distribution boards.
• Network systems: Compatible with TN, TN-C and TN-C-S network systems.

Safety and compliance with standards

The arrester insert has been designed and manufactured in accordance with IEC/EN 61643-11, which guarantees its reliability and effectiveness. The IP20 degree of protection provides protection against accidental contact. The N-PE protection level of 1.5kV further increases the safety of the electrical installation. Using this arrester insert is an investment in long-term protection of sensitive electrical and electronic devices from the effects of surges.