{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LADN40TQ","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"LADN40TQ","canonicalUrl":"https://aoctrl.com/schneider/LADN40TQ","factsUrl":"https://aoctrl.com/api/mcp/products/LADN40TQ","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric, TeSys Deca / TeSys D series, auxiliary contact block, LADN40TQ, 4NO, front-mount, screw clamp terminals, 10 A thermal current, 690 V rated insulation voltage.","salesMarkdown":"The Schneider LADN40TQ is a front-mount auxiliary contact block from the TeSys Deca and TeSys D series. The 4 NO contact composition means this block adds four form-A (normally-open) auxiliary circuits. Use it where you need to signal contactor position or interlock a logic input — it does not provide any normally-closed break contacts, so plan your safety circuit accordingly. The AC-15 rated operational current of 6 A at 120 V is the typical pilot-duty load for solenoid valves and contactor coils; at 690 V AC-15 it drops to 1.04 A, reflecting the higher switching stress on the contacts at elevated voltage. DC-13 rating of 0.55 A at 125 V covers DC coil or indicator loads. The minimum switching capability of 5 mA at 17 V means it will reliably switch dry-contact signals in low-energy PLC input circuits without contact wetting. ## Deployment context This block mounts to the front of a TeSys D or TeSys Deca contactor or reversing starter, adding auxiliary contacts without increasing the panel depth beyond the contactor's own envelope. Screw-clamp terminals accept one or two conductors from 1 to 2.5 mm², solid or flexible, with a tightening torque of 1.7 N·m — typical for a #2 Pozidriv or 6 mm flat-blade driver.","metaTitle":"Schneider LADN40TQ Auxiliary Contact Block, 4NO, Front Mount","metaDescription":"LADN40TQ auxiliary contact block, 4NO, screw clamp, 10 A thermal current, 690 V rated insulation voltage. Obsolete — sourced to order against an RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Motor Control Accessories"],"specifications":{"Depth":"42 mm","Range":"TeSys TeSys Deca","Width":"44 mm","Colour":"Dark grey","Height":"48 mm","Product name":"TeSys D TeSys Deca","Protection type":"GG fuse 10 A","lifecycle_stage":"current","Non-overlap time":"1.5 ms on de-energisation no overlap between NC and NO contact 1.5 ms on energisation no overlap between NC and NO contact","Device short name":"LADN","Mounting location":"Front","Tightening torque":"1.7 N.m - with screwdriver flat Ø 6 mm 1.7 N.m - with screwdriver Philips No 2 1.7 N.m - with screwdriver pozidriv No 2","Contacts operation":"Instantaneous","Operating altitude":"3000 m","Protective treatment":"TH conforming to IEC 60068","Insulation resistance":"> 10 MOhm","Mechanical durability":"30 Mcycles","Connections - terminals":"Screw clamp terminals 1 cable(s) 1...2.5 mm²flexible with cable end Screw clamp terminals 1 cable(s) 1...2.5 mm²flexible without cable end Screw clamp terminals 2 cable(s) 1...2.5 mm²flexible with cable end Screw clamp terminals 2 cable(s) 1...2.5 mm²flexible without cable end Screw clamp terminals 1 cable(s) 1...2.5 mm²rigid Screw clamp terminals 2 cable(s) 1...2.5 mm²rigid","IP degree of protection":"IP20 conforming to IEC 60529","Pole contact composition":"4 NO","Minimum switching current":"5 mA","Minimum switching voltage":"17 V","Product or component type":"Auxiliary contact block","Irms rated making capacity":"140 A AC conforming to IEC 60947-5-1 250 A DC conforming to IEC 60947-5-1","Environmental characteristic":"Normal environment","Permissible short-time rating":"100 A 60 °C 1 s 120 A 60 °C 500 ms 140 A 60 °C 100 ms","[Ui] rated insulation voltage":"690 V conforming to IEC 60947-5-1 600 V conforming to UL 60947-5-1 600 V conforming to CSA C22.2 No 60947-5-1","[Ie] rated operational current":"6 A at 120 V AC-15 1.04 A at 690 V AC-15 0.55 A at 125 V DC-13 0.1 A at 600 V DC-13","[Ue] rated operational voltage":"690 V AC","Ambient air temperature for storage":"-60...80 °C","Ambient air temperature for operation":"-5...60 °C","[Ith] conventional free air thermal current":"10 A (at 60 °C)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/82ec90233f9bd074dd852450a6c3f114.pdf","sourceUrl":"https://www.se.com/nl/en/product/LADN40TQ/auxiliary-contact-block-tesys-deca-4no-front-mounting-screw-clamp-terminals-pack-10/","alternativesUrl":"https://aoctrl.com/api/mcp/products/LADN40TQ/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/LADN40TQ","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/schneider/LADN40TQ when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}