Schneider Electric NSB 9001KA3 Contact Block Assembly

Schneider Electric NSB 9001KA3 Contact Block Assembly is a 30 mm contact block for Harmony 9001K and 9001SK switch bodies. It provides a single normally closed (1NC) contact with protected terminals and screw-clamp wiring, and uses silver-alloy contacts rated up to 600 V. The block supports positive-opening action and is designed for side mounting on the 30 mm control module, with options for top or rear mounting orientation. For multi‑circuit configurations, the 9001KA3 can be stacked with up to three additional levels of contact blocks (up to six blocks total on a single operator). This makes it suitable for compact, multi‑signal control in industrial panels where a single pushbutton must switch multiple circuits. As part of Schneider Electric’s Harmony 9001K family, this accessory extends a 30 mm pushbutton with a finger-safe NC contact and wire‑terminal protection, enabling robust, easy wiring in automation applications.