An auxiliary contact block for Schneider TeSys D contactors, providing two normally-open and two normally-closed contacts. It clips onto the front of the contactor and is operated by the same armature, so its contacts follow the main poles exactly. Auxiliary contacts carry no load current; they exist to tell the rest of the installation what the contactor is doing — holding in a start circuit, interlocking against another contactor, or reporting run status to a controller. The 2 NO + 2 NC arrangement suits schemes that need both a seal-in and a separate signalling contact of each sense. Supplied by cBallast on quote-to-invoice terms; lead time and freight are quoted per RFQ against the destination Incoterm.