The XN4E-BL402MR is a double-pole single-throw (DPST) Emergency-stop Switch with push lock-turn reset red mushroom shape operator and 2NC gold plated silver contacts. This XN4E series non-illuminated E-stop switch features metallic padlock, M3.0 screw terminals and can accept 16AWG maximum wire. The DEC's original "safe break action" ensures that the NC contacts open when the contact block is detached from the operator.