{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5TT5042-2","brand":"Siemens","brandSlug":"siemens","productSlug":"5TT5042-2","canonicalUrl":"https://aoctrl.com/siemens/5TT5042-2","factsUrl":"https://aoctrl.com/api/mcp/products/5TT5042-2","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON Insta contactor, 5TT5042-2, 2 NO + 2 NC contacts, 24 V AC/DC coil, rated 400 V AC, 40 A, IP20, 3 modular width units.","salesMarkdown":"The Siemens 5TT5042-2 is a SENTRON Insta contactor with 2 normally-open and 2 normally-closed contacts, rated for 400 V AC and a 40 A switching capacity. The coil is 24 V AC/DC, so it works with either supply — no separate coil voltage variant needed for mixed-control panels. At 3 modular width units (roughly 53.5 mm wide), it snaps onto a DIN rail inside an enclosure. The 71 mm depth (64 mm installation depth) fits standard 80 mm deep enclosures, but the manufacturer notes that spacers are required between units for heat dissipation — don't pack them tight without air gaps. ## Contact configuration and coil drive The 2 NO + 2 NC contact arrangement gives you one set for the load and one for a feedback signal or interlock, without adding an auxiliary contact block. The 24 V AC/DC coil draws 4 W per pole in hot operating state at rated current — factor that into your power supply budget if you're running several contactors in a row. The coil accepts both AC and DC, so a single 24 V power supply can drive the whole panel. No need to run a separate AC control transformer just for this contactor.","metaTitle":"Siemens 5TT5042-2 SENTRON Insta Contactor, 24 V AC/DC Coil,","metaDescription":"Siemens 5TT5042-2 SENTRON Insta contactor, 2 NO + 2 NC contacts, 24 V AC/DC coil, rated 400 V AC. 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","at DC rated value":"24 V","Installation Depth":"64 mm","Product Brand Name":"SENTRON","Product Designation":"Insta contactor","Rated Value Maximum":"24 V","protection class IP":"IP20","Design Of The Product":"2 NO contacts 2 NC contacts","number of NC contacts":"2","number of NO contacts":"2","Installation Or Assembly Note":"provision must be made for spacers to ensure heat dissipation","Number Of Modular Width Units":"3","Type Of Voltage Of The Operating Voltage":"AC","Product Extension Installable Supplementary Devices":"Yes","Type Of Voltage Of The Operating Voltage For Actuation":"AC/DC","power loss [W] for rated value of the current at AC in hot operating state per pole":"4 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/fd66dd0f067dd60884b0df17df479eb0.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=315960&mlfb=5TT5042-2","alternativesUrl":"https://aoctrl.com/api/mcp/products/5TT5042-2/alternatives.json"},"ai":{"faq":[{"question":"What is the coil voltage for 5TT5042-2?","answer":"The coil is rated 24 V AC/DC, so it operates on either 24 V AC or 24 V DC supply."},{"question":"What are the contact ratings for 5TT5042-2?","answer":"It has 2 NO and 2 NC contacts, rated for 400 V AC and 40 A switching capacity."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5TT5042-2","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/5TT5042-2 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}}