Square D (Schneider Electric) XCSZ01 Switch Actuator. Telemecanique Square D Switch Actuator, Straight, For Use With: XCSA, XCSB, XCSC, XCSE, XCSLE and XCSLF Series Metal Guard Switch. Additional Description: SQD -XCSZ01 SAFETY INTERLOCK KEY TYPE XCS. Catalog Description: Preventa XCS, safety switches, straight actuator, for metal switches.