{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LX4D8SD","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"LX4D8SD","canonicalUrl":"https://aoctrl.com/schneider/LX4D8SD","factsUrl":"https://aoctrl.com/api/mcp/products/LX4D8SD","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric TeSys Deca, contactor coil LX4D8SD, 72 V DC, obsolete.","salesMarkdown":"The LX4D8SD is a replacement coil for the TeSys Deca contactor range, wound for a 72 V DC control circuit. It pulls in at 0.75 to 1.2 Uc and drops out between 0.15 and 0.4 Uc. ## Sourcing reality — obsolete, not gone Schneider has marked the LX4D8SD as obsolete. ## Electrical and thermal notes The coil draws 270 to 365 W inrush at 20 °C, then settles to a hold-in power of 2.4 to 5.1 W. Average resistance is 4377 ohms. There is no built-in suppressor module, so you need an external flyback diode or RC snubber across the coil to protect the DC control circuit from the inductive kick when the contactor opens. The closed-circuit inductance is 109.69 H, which governs the release time constant of 25 ms — expect the contactor to drop out about 25 ms after the control signal is removed, relevant for sequencing logic that expects a faster break.","metaTitle":"Schneider Electric LX4D8SD TeSys Deca Contactor Coil, 72 V D","metaDescription":"Schneider Electric LX4D8SD TeSys Deca contactor coil, 72 V DC control circuit. Obsolete — sourced to order against an RFQ. 8 Mcycles mechanical durability, 1200 cyc/h max rate.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Contactor & Starter Coils"],"specifications":{"Range":"TeSys","Category":"22341-CONTACTOR,D,K,&F ACCESS","Time constant":"25 ms","Coil technology":"Without built-in suppressor module","lifecycle_stage":"current","Device short name":"LX4D8","Inrush power in W":"270...365 W 68 °F (20 °C))","Average resistance":"4377 Ohm 68 °F (20 °C)","Control circuit type":"DC standard","Mechanical durability":"8 Mcycles","Nbr. of units in pkg.":"1","Maximum operating rate":"1200 cyc/h 140 °F (60 °C)","Product or Component Type":"Contactor coil","Inductance of closed circuit":"109.69 H","[Uc] control circuit voltage":"72 V DC","Control circuit voltage limits":"Operational: 0.75...1.2 Uc (at Drop-out: 0.15...0.4 Uc (at <131 °F (55 °C))","Hold-in power consumption in W":"2.4...5.1 W 68 °F (20 °C)","Ambient Air Temperature for Operation":"23...140 °F (-5...60 °C)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/79dc8f035b94ccb690690f5e217cbbdb.pdf","sourceUrl":"https://www.se.com/ie/en/product/LX4D8SD/coil-lx4d-tesys-deca-72-v-dc/","alternativesUrl":"https://aoctrl.com/api/mcp/products/LX4D8SD/alternatives.json"},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to the LX4D8SD?","answer":"No official successor order code is listed in the lifecycle record. A pin-compatible alternative from the same TeSys Deca family is not documented; sourcing the exact LX4D8SD coil is the only way to guarantee fit without rewiring or adapting the mounting."},{"question":"What range does the LX4D8SD belong to?","answer":"It is part of the TeSys range, specifically the TeSys Deca contactor series."},{"question":"What is the control circuit voltage for the LX4D8SD?","answer":"The control circuit voltage is 72 V DC, with operational limits of 0.75 to 1.2 Uc and dropout at 0.15 to 0.4 Uc."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/LX4D8SD","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/LX4D8SD 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}}