Schneider Electric 9001KA3 Push Button Switch

Schneider Electric's Harmony 9001KA3 is a red 30 mm contact block designed to mount with Harmony 9001 push-button operators (types K, SK or KX). It provides a single normally closed (1 NC) contact and uses protected screw-clamp terminals for safe wiring in panel installations. The block is rated for 0–600 V circuits and uses silver-alloy contacts for reliable switching in industrial environments. It mates with 9001K, 9001SK, and 9001KX push-button components to extend a 30 mm operator into a multi-block control circuit. In typical panel assemblies, the KA3 adds a discreet NC contact to a red push-button arrangement, enabling monitoring or interlock-style logic when used with adjacent blocks. The KA3 designation identifies this 1NC red contact block for Square D Harmony 9001 series and its compatibility with the broader family of 9001K, 9001SK, and 9001KX operators. With protected terminals, wiring errors are reduced and panel wiring remains safer in automation and machine-control applications.