... wide metal rail 2.steel or aluminum 3. CE certificated Din RailA DIN rail or top-hat rail is a standardized 35 ... mm wide metal rail with hat-shaped cross section ... the popular 35 mm x 7.5 mm top-hat rail (EN 50022, BS 5584, DIN 46277-3), ... types of mounting rails have been standardized:Miniature top-hat rail, 15 mm x 5.5 mm (EN 50045, ...