Surge protection for NEMA systems

VAL-US with 4 plugs

UL Listed Surge Protection

Special demands require special products, VAL-US offers the solution for NEMA systems

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In North America and other regions in the world, power supply systems are operated with voltages and network configurations that can sometimes be significantly different to those of the IEC. The products in the VAL-US series are suitable for these network configurations. The VAL-US series covers a multitude of wiring configurations for split-phase, wye, high-leg delta and corner-grounded delta systems, among others.

Your advantages

  • Easy integration in existing applications, thanks to UL-Open Type 1 Listed
  • Available for all standard network configurations according to NEMA
  • Easy monitoring of system status, thanks to local status indicator and remote indication contact
  • Plugs can be tested with CHECKMASTER 2

Open Type 1 Listed surge protection according to UL 1449

Surge protection for NEMA systems  

Surge protection for NEMA systems

VAL-US represents the world's largest selection of UL Open Type Listed surge protective devices (SPDs). "Open Type", also referred to as "Open Terminal", refers to a category of surge protective devices newly introduced in UL 1449. This new category allows DIN-rail mountable SPDs to obtain UL-Listed approval. As the VAL-US series has the UL-Open Type 1 Listed approval, this makes acceptance testing of installations and systems significantly easier for inspectors.

The product portfolio

Comprehensive portfolio for all network configurations  

Comprehensive portfolio for all network configurations

The VAL-US line of products contains pluggable surge protective devices for installations and systems in North America and Mexico. These products are also used in regions where network configurations that comply with the NEMA standard are used. The intelligent design of these plugs features a window with optical status indicator. This means you can identify overloaded plugs directly on site. A remote indication contact is available for remote maintenance. The base element and corresponding plug are coded to one another. This prevents incorrect replacement or tampering during maintenance work. The VAL-US series comprises a wide range of circuit configurations, both for standard systems such as 120/240 V split-phase and 277/480 V wye, and also for special network configurations such as 120/208/240 V high-leg delta and corner-grounded delta.


8240 Parkhill Drive
Milton, Ontario L9T 5V7


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Surge protection for building installation

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