Surge arrester T2 (C) ETITEC C T2 440/20 1+0 002440405

Electrical installation protection with ETITEC surge limiters

The ETITEC C T2 440/20 1+0 surge limiter is a key element in protecting the electrical installation from the effects of current surges, e.g. caused by lightning strikes. This device, designed for mounting on a TH-35 mm DIN rail, effectively protects against overvoltages in TN, IT and TN-S networks. Its task is to limit the voltage to a safe level, minimizing the risk of damage to connected devices and ensuring uninterrupted power supply.

Construction and application

This limiter belongs to class T2, which means it is designed for indirect protection against the effects of direct and indirect lightning strikes. Its construction based on varistor technology ensures a quick response to sudden voltage increases. The rated AC voltage is 400V, and the maximum permissible operating voltage is 440V. This limiter is used in residential, commercial and industrial buildings, where protection against overvoltages is particularly important – it protects both end devices and the installation itself. Optical signaling of varistor damage (red "window") facilitates quick identification of the need for device replacement.

Key features and benefits

• High protection efficiency: Rated discharge current of 20 kA and maximum discharge current of 40 kA guarantee effective protection against overvoltages with high energy.

• Versatility: Possibility of use in various network systems (TN, IT, TN-S, TN-C) increases the range of applications of the device.

• Compact dimensions: 1 module size allows for easy installation in switchboards with limited space.

• Simple diagnostics: Optical damage signaling facilitates quick detection of failure and device replacement.

• Safety: Has the CE marking confirming compliance with European standards.

• Durability: Short-circuit strength at the level of 25 kA ensures resistance to short-circuit currents occurring in the installation.

• Connection flexibility: Support for conductors with a cross-section of up to 35 mm² (solid/stranded) and 25 mm² (flexible) ensures compatibility with various types of cabling.

• Protection level: Provides a protection level of 2 kV, minimizing the risk of damage to connected devices.

Thanks to these features, the ETITEC C T2 440/20 1+0 surge limiter is a reliable solution for professionals and end-users looking for effective protection of the electrical installation against the effects of overvoltages.