Surge limiter insert SPBT12 SPBT12-280 167341

Overvoltage protection in electrical installations

The SPBT12-280 surge limiter cartridge is a component designed to protect electrical installations from the effects of overvoltages, both those originating from atmospheric discharges and from switching processes in the network. This device finds application in both residential and industrial buildings, providing protection for sensitive electronic devices.

This modular limiter, mounted on a base, is characterized by high efficiency and reliability. Its sealed technology design eliminates the risk of gas venting during operation, increasing safety. Optical signaling informs about any damage to the cartridge, facilitating quick identification of the need for replacement.

Key features and applications:

• Protection class Type 1+2 (B+C): provides comprehensive protection against both direct and indirect overvoltages. This means that the device is able to cope with both large current impulses resulting from a lightning strike and smaller disturbances in the network.
• Impulse current 12.5 kA (10/350 µs): a high impulse current value guarantees effective protection even in the event of strong overvoltages. This is a key parameter for installations exposed to frequent atmospheric discharges.
• Operating voltage 280 V AC: dedicated to 280V AC networks, making it an ideal solution for most standard electrical installations in residential and commercial buildings.
• Energetically coordinated protection: although the cartridge itself does not have this feature, it is worth remembering the possibility of coordinating protection with other elements of the surge protection system to ensure optimal safety of the entire installation.
• Wide range of applications: performs well in TN systems (including TN-C), as well as in other network configurations – providing great flexibility when choosing the right solution.
• DIN rail mounting: enables easy and quick installation in the electrical distribution board. The compact size (1 module) allows for saving space.
• Maximum wire cross-section: accepts wires with a cross-section of up to 25 mm² (solid/stranded) and 35 mm² (flexible), ensuring compatibility with different types of cabling.

The SPBT12-280 limiter is particularly recommended for use in the main distribution boards of residential buildings and public utility facilities, where overvoltage protection is crucial to ensure the safety and continuity of operation of electrical devices. Thanks to its reliability and ease of installation, it is an effective solution for professional installers and end-users looking for solid protection for their electrical installations.