The LADN226JTQ is a TeSys Deca auxiliary contact block from Schneider Electric, configured with 2 normally-open and 2 normally-closed instantaneous contacts. It mounts on the front of a TeSys Deca contactor or reversing starter, adding control-circuit feedback or interlocking logic. The contacts are rated for 6 A at 120 V AC-15 (inductive solenoid loads) and 0.55 A at 125 V DC-13 (DC solenoid loads), with a conventional free-air thermal current of 10 A at 60 °C.
Schneider has marked the LADN226JTQ as obsolete. If your panel design can accept a parametric equivalent, a current-production TeSys Deca auxiliary block with the same 2NO+2NC contact arrangement and front-mount footprint is the practical substitute; verify the terminal style (lugs-ring vs. screw-clamp) and packing quantity against your stores.
The AC-15 and DC-13 ratings govern inductive load switching: 6 A at 120 V AC covers most 120 V control relays and contactor coils; the 0.55 A at 125 V DC-13 is the figure to check for DC solenoid or brake circuits. Minimum switching capability is 5 mA at 17 V, so the block can handle low-level PLC signals without contact wetting issues. The 1.5 ms non-overlap time between NC and NO contacts during energisation and de-energisation ensures break-before-make in safety interlock or reversing circuits.
Front-mounting on a TeSys Deca contactor or reversing starter — no DIN-rail space consumed. Connections use lugs-ring terminals accepting an 8 mm outer diameter ring; tightening torque is 1.7 N·m with a flat, Philips No 2, or Pozidriv No 2 screwdriver on the M3.5 screw. The block is 44 mm wide, 48 mm high, and 42 mm deep, colour dark grey. Operating temperature range is -5 to 60 °C, storage -60 to 80 °C, with TH protective treatment per IEC 60068 for humid environments. Altitude rating is 3000 m without derating.