Schneider Electric LUFN20 Auxiliary Contact Block

LUFN20 is Schneider Electric's auxiliary contact block for TeSys Ultra (TeSys U) starter controllers, delivering two normally open (NO) contacts to provide independent control signaling alongside the main power path. It is rated up to 5 A at up to 250 V, with documentation and retailer listings indicating AC capability and regional references that also list 250 V DC compatibility, and it uses screw terminals for secure, field-terminations. This module is designed to extend the TeSys U control circuit with status signaling, interlocking, or feedback to external controllers such as PLCs, without altering the function of the main contacts. As part of the TeSys Ultra accessory family, the LUFN20 is a compact, dedicated signaling block that integrates with TeSys U starters to streamline wiring, simplify diagnostics, and enhance panel monitoring by providing reliable two‑channel NO signaling in a single, interchangeable add‑on component.