Cleverly Combined – Raycap Develops Type-2 Din Rail Mounted Surge Protection Device with Integrated Fuse

Garching, January 27, 2021 – Raycap, an international manufacturer of electronic components for surge protection, surge monitoring, and connectivity solutions, launches a new line of 2-in-1 surge protectors for demanding industrial applications. The pluggable ProTec T2F Type 2 arrester with an integrated fuse saves space in the control cabinet and facilitates installation as well as maintenance, thus reducing overall costs.

The new type 2 arrester ProTec T2F has a protection level of 1,500 V, a maximum discharge capacity of 40 kA 8/20 μs, and a rated discharge current of 20 kA 8/20 μs with no backup fuse needed. Thus, in addition to the proven Raycap ProTec T2 product technology, which was developed for use in systems with a rated current of up to 315 A without a backup fuse. This product can offer protection independent of the installed fuses in equipment in larger factories and industrial plants.

Compact Design Saves Space and Facilitates Installation

With integrated fuse and external fuse holder assembly eliminated, the Raycap ProTec T2F offers up to 50 percent less space requirement in the control cabinet compared to conventional type 2 arresters with external backup fuses. The combined device conforms to standard DIN Rail dimensions, making the installation faster and more cost-effective.

In addition, the practical 2-in-1 device simplifies planning, installation, and maintenance. For example, the question of dimensioning the backup fuse does not arise with the ProTec T2F, as this is already integrated and matched to its performance parameters. Selectivity of the proper fuse now plays a subordinate role since the combination device is already correctly configured.

“With integrated fuse, the ProTec T2F not only saves our customers time, space and money during planning and installation, it also makes maintenance and replacement of the assembly enormously easier,” says Ralf Güthoff, General Manager Lightning and Surge Protection at Raycap.

Highest Protection – Even Against Low Short-Circuit Currents

Raycap paid particular attention to the metal oxide varistor (MOV) and developed a special fuse for this technology combination. This design increases the overall safety of the respective system and prevents its complete shutdown as a result of an overvoltage and short circuit event. “With the ProTec T2F, we offer a compact type 2 arrester with an integrated fuse that protects the technology on-site just as safely as it protects people. Unforeseen, usually costly production shutdowns can thus be prevented,” explains Ralf Güthoff.

The new Raycap ProTec T2F complies with IEC class II according to IEC 61643-11. For more information please send an email to