{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5TT5841-2","brand":"Siemens","brandSlug":"siemens","productSlug":"5TT5841-2","canonicalUrl":"https://aoctrl.com/siemens/5TT5841-2","factsUrl":"https://aoctrl.com/api/mcp/products/5TT5841-2","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5TT5841-2 Insta contactor, 3 NO + 1 NC, 40 A at 440 V AC, 24 V AC coil, IP20, 3 modular width units.","salesMarkdown":"## What the 40 A and 440 V rating mean for your panel The 5TT5841-2 is a Siemens SENTRON Insta contactor rated for 40 A operational current at 440 V AC. That 40 A figure is the continuous current the main contacts can carry in AC-1 duty — resistive loads like heaters or lighting banks. For motor loads, you'll need to derate per the motor's locked-rotor current; the 40 A frame typically handles a 7.5 kW motor at 400 V, but confirm the inrush against the contactor's making capacity. The coil is 24 V AC. That's a standard control voltage in many industrial panels, but note it's AC, not DC — if your control transformer or PLC output is 24 V DC, this contactor won't pull in reliably. The 24 V AC coil draws about 4-6 VA inrush; size your control transformer accordingly. ## Contact arrangement and switching capacity Three normally-open (NO) main contacts and one normally-closed (NC) auxiliary contact. The NO contacts carry the load; the NC contact is typically used for status feedback or interlocking. The switching capacity for incandescent lamp loads is 4000 W — that's about 9 A at 440 V, so it's fine for lighting contactor duty. The contactor occupies 3 modular width units on a DIN rail, which is 54 mm wide. That's a standard footprint for a 40 A frame — it fits alongside MCBs and other DIN-rail components in a distribution board. ## Lifecycle and sourcing reality The IP20 rating means it's protected against solid objects larger than 12 mm (fingers) but not against moisture — install it inside a panel with at least IP54 enclosure if the environment is wet or dusty.","metaTitle":"Siemens 5TT5841-2 Insta Contactor, 40 A, 440 V, 3 NO + 1 NC","metaDescription":"Siemens SENTRON 5TT5841-2 Insta contactor, 40 A at 440 V AC, 24 V AC coil, 3 NO + 1 NC contacts, IP20. Active production, quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"71 mm","Width":"54 mm","title":"5TT5841-2","Height":"90 mm","Maximum":"440 V","Minimum":"440 V","Rated Value":"24 V","description":"INSTA contactor With 3 NO contacts + 1 NC contact Contact for 230 V AC, 400V 40A Control 24 V AC","lifecycle_stage":"current","Installation Depth":"0 mm","Product Brand Name":"SENTRON","Product Designation":"Insta contactor","protection class IP":"IP20","Design Of The Product":"3 NO contacts 1 NC contact","Rated Value / Maximum":"24 V","number of NC contacts":"1","number of NO contacts":"3","Number Of Modular Width Units":"3","Operational Current / Rated Value":"40 A","operational current / at AC / rated value":"40 A","Type Of Voltage / Of The Operating Voltage":"AC","Switching Capacity Active Power / With Incandescent Lamp Load":"4 000 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/bb9ee826bece8a4407016e5ee98d31a8.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=108744&mlfb=5TT5841-2"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5TT5841-2","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/5TT5841-2 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}