The D4NS-4AF safety door switch is presented as a single-unit replacement for D4NS-series door safety switches (for example D4NS-4CF) where mechanical and electrical interfaces match. This listing corresponds to the D4NS-4AF variant with a contact configuration of 1 normally closed (NC) and 1 normally open (NO). The item is suitable for use as a safety interlock on machine guards, access doors, and protective enclosures. Note: no full datasheet dimensions were available in the provided sources; one external source reported an item weight of 7.0 kg - please verify weight and dimensional fit against your equipment before ordering.