Two series of SIDACtor protection thyristors from the company are optimised to protect equipment located in high exposure environments from severe over-voltage transients. The Pxxx0MEL 5kA series and Pxxx0FNL 3kA series SIDACtor protection thyristors are claimed to offer enhanced reliability through multiple high energy surge events. Unlike many non-semiconductor-based high power protective products, which can experience functional degradation after only a few surge events, the Pxxx0MEL and Pxxx0FNL series are semiconductor-based components, and will continue to provide protection through multiple surge events without functional degradation.

Typical applications for the protection thyristors are CATV amplifiers, telecomms basestation equipment, cell towers, uninterruptible power supplies (UPS)/AC high-power distribution grids, automotive battery charging systems, solar power system DC/AC inverters and uninterruptible battery backup systems.
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The thyristors offer on-state voltage values that are much lower than the arc voltage of a traditional gas discharge tube, says the company. This low on-state voltage means they can handle much higher surge currents, while also offering a much lower voltage threshold than the clamping voltage of a metal oxide varistor. They can be used in series with clamping devices such as varistors or TVS didoes for protecting AC power input lines, adds the company.

The Pxxx0MEL 5kA Series SIDACtor protection thyristors are supplied in TO-218 packaging and the Pxxx0FNL 3kA Series SIDACtor protection thyristors are supplied in TO-262M packaging. Sample requests may be placed through authorised distributors.