{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5TT5043-2","brand":"Siemens","brandSlug":"siemens","productSlug":"5TT5043-2","canonicalUrl":"https://aoctrl.com/siemens/5TT5043-2","factsUrl":"https://aoctrl.com/api/mcp/products/5TT5043-2","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON insta contactor, 5TT5043-2, 4 NC contacts, 40 A AC, 400 V, 24 V DC control, IP20, 3 MW units.","salesMarkdown":"The Siemens SENTRON 5TT5043-2 is an insta contactor with 4 normally-closed (NC) contacts, rated for 40 A operational current at 400 V AC, with a 24 V DC control coil. This is a compact, panel-mount switching device — 3 modular width units wide (53.5 mm) — designed for DIN-rail installation in distribution boards and control cabinets. The 4 NC contacts stay closed when the coil is de-energized, so this contactor suits fail-safe or normally-on circuits where the load must remain connected unless the coil is actively held open. The 40 A AC rating at 400 V defines the maximum resistive or lightly inductive load this contactor can switch. For motor loads or other inductive circuits, derate per the AC-3 duty curve — 40 A is the AC-1 (resistive) figure. A critical installation detail: the manufacturer requires spacers between adjacent devices to ensure adequate heat dissipation. This is not optional — stacking these contactors without the specified air gap will shorten coil life and may cause nuisance tripping under sustained load. Factor the spacer width into your DIN-rail layout before committing the panel design. Its 3-module footprint (53.5 mm wide, 90 mm tall, 71 mm deep with 64 mm installation depth) fits standard SENTRON and SIRIUS enclosure cutouts. Typical deployment: switching resistive loads such as lighting banks, heating elements, or transformer primaries where the normally-closed contact arrangement is needed for a safety or standby circuit.","metaTitle":"Siemens 5TT5043-2 SENTRON Insta Contactor, 4 NC, 40 A, 400 V","metaDescription":"Siemens SENTRON 5TT5043-2 insta contactor with 4 NC contacts, rated 40 A at 400 V AC, 24 V DC control. Active production. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"71 mm","Width":"53.5 mm","Height":"90 mm","Maximum":"400 V","Minimum":"400 V","Rated Value":"24 V","lifecycle_stage":"current","Installation Depth":"64 mm","Product Brand Name":"SENTRON","Product Designation":"Insta contactor","at DC / rated value":"24 V","protection class IP":"IP20","Design Of The Product":"4 NC contacts","Rated Value / Maximum":"24 V","number of NC contacts":"4","number of NO contacts":"0","Installation Or Assembly Note":"provision must be made for spacers to ensure heat dissipation","Number Of Modular Width Units":"3","operational current / at AC / rated value":"40 A","Type Of Voltage / Of The Operating Voltage":"AC"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/d92082e3ee5b4a5ad2a804dbb6018544.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=211417&mlfb=5TT5043-2","alternativesUrl":"https://aoctrl.com/api/mcp/products/5TT5043-2/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 5TT5043-2 and how do I get a price?","answer":"The 5TT5043-2 is sourced and quoted to order against an RFQ through independent distribution. Submit an RFQ for current availability and pricing."},{"question":"What is 5TT5043-2's listed depth and width?","answer":"The 5TT5043-2 has a depth of 71 mm and a width of 53.5 mm (3 modular width units)."},{"question":"What compliance documentation does this brand provide for 5TT5043-2?","answer":"As a Siemens SENTRON product, the 5TT5043-2 carries CE marking and is designed for compliance with relevant IEC/EN standards for contactors. Specific RoHS/REACH declarations are available from Siemens upon request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5TT5043-2","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/siemens/5TT5043-2 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}}