Weidmüller CH20M17 B FE BK/BK 2010 is a Base element (Modular housing), Width: 17.5 , IP20 in installed state, Plastic, black. The basic element for direct mounting on the mounting rail. There are also variants with a Recess in detent foot area for a BUS contact or a FE contact. https://elecena.pl/product/29439782/weidm-x171-ller-1378000000-basic-element-ip20-installed-state-plastic 2025-10-19 https://elecena.pl/product/29439782/weidm-x171-ller-1378000000-basic-element-ip20-installed-state-plastic 2026-05-13