The new benchmark in surge protection

VARITECTOR PU AC S line with HAD-Technology

Free up space in your cabinet

With increasing digitization, the infrastructure of intelligent devices and systems is becoming more and more sensitive to interferences. Besides, cost and competition are forcing manufacturers to improve compactness and efficiency of their products. The innovative HAD-Technology of our VARITECTOR PU AC S line enables a particularly space-saving design with only 18 mm width per pole. For excellent surge protection with a slim design and an attractive price/performance ratio.

Your benefits at a glance



The reduction of the components from 2 TE to 1 TE per pole with 25 kA discharge capacity allows a 50% smaller space requirement. The plug-in design of the modules accelerates the replacement of arresters.



With a protection level of 1,500 V, the VPU AC S line is coordinated as an arrester of type I, II and III. Additional protection is therefore only required only for wiring distances of more than 10 m to the next electrical device.



The components are certified according to IEC 61643-11 of course, but they offer much more than standard devices: fuseless operation up to 315 A, for example. As no separate back-up fuse is required, there is no need for additional space, installation work and costs.

Technology highlight

Weidmüller‘s VPU AC S line was developed to combine the best features of voltage switching and voltage limiting protection technologies and create an ideal Type I surge protection. The innovative HAD technology (Homogeneous Arc Distribution) is extremely compact and uses a voltage switching technology with a very low residual voltage. This enables the products to achieve a low follow current strength, which means that even a 16 A fuses will not trip.

HAD technology

HAD technology

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Get to know our VARITECTOR PU S-Line - safe, efficient and extremely space-saving! You will learn more about our innovative HAD technology.​

Bosch Building Automation GmbH has also been convinced by the product: "Especially for us in switchgear construction, the reduced wiring effort and the space savings due to the elimination of the back-up fuse are a great advantage. Thanks to the good connection technology, we also achieve an increase in efficiency,

Dirk Späte, Team leader control cabinet production BOSCH AUTOMATION CABINET BUILDING

Products using HAD technology


Safe, efficient and extremely space-saving!

VARITECTOR PU AC I with integrated fuse

Fuseless type I protection – combine operational safety and efficiency


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