DEHNguard® modular
DG M TNC 440 FM (952 308) ■ Prewired complete unit consisting of a base part and plug-in protection modules ■ High discharge capacity due to heavy-duty zinc oxide varistors / spark gaps ■ High reliability due to "Thermo Dynamic Control" SPD monitoring device https://docs-emea.rs-online.com/webdocs/13ba/0900766b813ba951.pdf