Square D (Schneider Electric) LAD8N20 TeSys Auxiliary Contact Block. Schneider Electric TeSys Auxiliary Contact Block, Instantaneous, Series: LAD, 690 VAC, 10 A, 25 to 400 Hz Frequency, 2 Contacts, >10 MOhm Contact Resistance, Clip-On/Side Mounting, 3000000 Cycles Operating Cycles, -5 to 60 deg C Operating, Environmental Conditions: 23 to 140 deg F Operating Temperature, For Use With: TeSys D-Line Contactor with AC Coils Only, 0.49 in W x 2.99 in D x 2.99 in H Dimensions. Additional Description: SQD -LAD8N20 CONTACTOR AUXILIARY CONTACT BLOCK IEC BLOCK IEC. Catalog Description: TeSys Deca, auxiliary contact block, 2 NO, side mount, screw clamp terminals, for LC1D09 to LC1D150 contactors.