3RA1921-1DA00

The 3RA1921-1DA00 is a specialized mechanical link and electrical wiring connector kit from Siemens' SIRIUS 3RA series, engineered to connect Size S0 3RT2 series contactors to 3RV2 series manual motor starters (motor starter protectors) without external power cabling. Designed for -pole power circuits operating up to , this modular assembly kit enables the fast, compact construction of direct-on-line (DOL) motor starter combinations in industrial control panels. Electrically, the 3RA1921-1DA00 features solid copper busbar links that establish a low-resistance, high-integrity electrical connection between the motor starter protector terminals and the contactor line-side terminals. By eliminating manual wire strip and crimp steps, it reduces contact resistance, minimizes heat generation under continuous motor loads (), and ensures reliable short-circuit and overcurrent power transfer across the integrated starter assembly. Mechanically, the 3RA1921-1DA00 consists of a rigid, snap-on plastic housing module and precision power link connectors designed to slide directly into terminal chambers, securing the two components into a single mechanical unit. Compatible with standard 35mm DIN-rail mounting, it dramatically reduces panel space requirements, streamlines assembly labor, and maintains touch-safe IP20 protection across the power wiring interface. Purchase the 3RA1921-1DA00 at Electrical.com, your reliable partner for industrial and commercial electrical products. Our selection includes trusted contactor wiring kits, motor starters, and panel accessories from top manufacturers like Siemens, Eaton, Cutler-Hammer, and Schneider Electric, backed by a knowledgeable sales team ready to assist with technical questions, product selection, and support.