Schneider Electric Telemecanique LA3DR4 Time Delay Block

Schneider Electric Telemecanique LA3DR4 Time Delay Block is a 1 NO + 1 NC off-delay auxiliary contact block in the TeSys D family that adds adjustable delay timing to contactors and control circuits in industrial motor control systems. Commonly installed in MCCs, conveyors, pumps, compressors, packaging machines, and electrical control panels, it provides an 10–180 second time delay and is compatible with TeSys D (LC1D, CAD) and TeSys F (LC1F, CR1F) contactors and control relays. Key electrical ratings include a conventional free-air current (Ith) of 10 A, rated insulation voltage Ui of 690 VAC (IEC) or 600 VAC (UL/CSA), and a rated operational voltage Ue up to 690 VAC with 25–400 Hz; AC-15 current handling is 6 A at 120 VAC and 1.04 A at 690 VAC. It features front clip-on mounting, screw clamp terminals, and a mechanical durability of 5 million operating cycles, with a minimum switching voltage of 17 V and minimum switching current of 5 mA. The LA3DR4 adheres to IEC 60947-5-1, EN 60947-5-1, UL 60947-5-1, and CSA C22.2 No. 60947-5-1, and carries UL, CSA, CCC, IECEE CB Scheme, EAC, and UKCA certifications, making it suitable for industrial motor control, automation systems, and electrical control panels where dependable delayed switching and interlocking are required.