XB4/ZB4 22mm push buttons are for industrial applications. XB4/ZB4 operators have chromium plated metal bezels that connect to a fully metal mounting collar. Operator is a red turn to release emergency push button. The operator has one normally open and one normally closed contact. Contacts have UL A600, UL Q300, IEC AC15 and IEC DC13 contact ratings. Contacts have screw clamp terminals. Push button has no marking. Push button is 1.18 inches tall, 1.82 inches wide and 4.70 inches deep. Push button weighs 0.31 lbs. Operator is NEMA 4, 4X and 13 rated. Also reated for IEC zone 21-22 dust zones and IEC zone 1-2 gas zones. Push button UL listed and CSA certified. It is an IP65 rated product and comes with INERIS 04ATEX9004U certification. It is easily installed into a standard 22mm diameter panel cut-outs and connected to control circuits with screw-clamp connections. The Harmony XB4 range offers innovative features for simple and efficient use. The Harmony XB4 - ATEX is the most comprehensive explosive Atmospheres range covering most applications.