Siemens 3SE5112-0CD02 Limit Switch

Siemens 3SE5112-0CD02 is a SIRIUS mechanical limit switch with a 40 mm metal enclosure built to EN 50041 standards. It features a roller plunger with 3 mm overtravel and a stainless-steel roller 13 mm in diameter, plus a 1 NO/1 NC quick-action contact arrangement for straightforward wiring. The device terminates through a single M20 x 1.5 gland, simplifying mounting and cable entry. Electrically, it is rated for up to 10 A at up to 400 VAC, making it suitable for end-of-travel sensing on conveyors, presses, and other automation equipment. The enclosure carries IP66 protection, delivering robust dust and water ingress resistance in demanding environments. This configuration—3SE5112-0CD02—belongs to Siemens' SIRIUS 3SE5 family, a line of metal-enclosed position switches designed for reliable, heavy-duty switching in industrial installations. Typical applications include detecting end positions on moving parts, interlocking sequences in safety circuits, and general position sensing where a rugged, 40 mm-wide switch with a stainless roller is advantageous. With the NO/NC outputs and quick-action contacts, wiring is straightforward and compatible with standard control inputs, enabling seamless integration into existing automation architectures.