Schneider Electric LA1KN40 TeSys K 4NO Front Mount Auxiliary Contact Block

The Schneider Electric LA1KN40 is a front-mount auxiliary contact block from the TeSys K series, designed to expand contactor functionality with a 4NO (four normally open) contact configuration. Weighing only 0.04 kg, this compact auxiliary contact block mounts directly to the front face of compatible TeSys K contactors, enabling reliable signal and control circuit integration in industrial automation and control panel applications.

Technical Specifications

Applications & Use Cases

• Contactor Expansion: Adds auxiliary signalling and interlocking contacts to TeSys K series contactors without increasing panel footprint significantly.
• Control Panel Wiring: Ideal for DIN-rail-based motor control centres and distribution boards requiring additional NO contacts for PLC feedback or indicator circuits.
• Industrial Automation: Used in machine control circuits, conveyor systems, pump stations, and HVAC applications where multiple normally open auxiliary contacts are required.
• Interlocking Circuits: Supports safety interlocking and status monitoring in automated production environments.

Frequently Asked Questions

What contactors is the LA1KN40 compatible with?

The LA1KN40 is designed for front-mount installation on Schneider Electric TeSys K series contactors. Always verify compatibility with your specific contactor model using the Schneider Electric selection guide.

What does 4NO mean?

4NO means the auxiliary contact block provides four normally open contacts. In the de-energised state all four contacts are open; when the contactor coil is energised, all four contacts close simultaneously.

How is the LA1KN40 mounted?

The LA1KN40 uses front mounting, attaching directly to the front face of the compatible contactor body — no additional tools or brackets are required for installation.