Surge protection limiter exchange module Type 2 (class C) - DC (side) MOD. SM T2 DC 500/20 S 002440730

Surge protection for DC installations – ETI POLAM exchangeable module

This exchangeable surge limiter module type 2 (class C) is a key element ensuring the safety and reliability of direct current (DC) installations. Designed for mounting on a base, it occupies only one module in the distribution box, which facilitates its integration with the existing system. This is particularly important in photovoltaic systems, electric vehicle chargers and other applications using direct voltage.

Construction and application

The SM T2 DC 500/20 S module is designed to protect against the effects of atmospheric and switching surges in DC networks. Its construction based on varistor technology ensures a quick and effective response to sudden voltage increases. Optical signaling informs about the operation of the limiter, allowing for quick identification and replacement of the damaged element. The rated DC voltage of 450V and the highest continuous operating DC voltage of 1000V make it a universal solution for many applications. The rated discharge current of 20kA (8/20) and the maximum discharge current of 65kA guarantee effective protection of the installation against damage.

Key features and benefits

• Protection for DC installations: Specifically designed to work with direct current, providing optimal protection in photovoltaic systems, EV chargers and other DC applications.
• Compact size: Occupies only one module, making it easy to install even in crowded distribution boxes.
• Optical signaling: Status indicator allows for quick assessment of whether the limiter has operated and needs to be replaced. This saves time and costs associated with problem diagnosis.
• High efficiency: Rated discharge current of 20kA and maximum discharge current of 65kA provide effective protection against surges.
• Safety: Compliance with standards ensures a high level of safety. IP20 protection degree protects against finger contact and larger solid bodies.
• Durability: Short-circuit withstand (Isccr) at 30kA provides resistance to short-circuit currents occurring in the installation.
• Versatility: Suitable for use in various DC network configurations, making it a versatile solution for professionals.