{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5TT5843-0","brand":"Siemens","brandSlug":"siemens","productSlug":"5TT5843-0","canonicalUrl":"https://aoctrl.com/siemens/5TT5843-0","factsUrl":"https://aoctrl.com/api/mcp/products/5TT5843-0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON Insta contactor, 5TT5843-0, 4 NC contacts, 40 A AC rated, 230 V AC coil, 440 V max, IP20, 3 MW units.","salesMarkdown":"The Siemens 5TT5843-0 is a SENTRON Insta contactor packing 4 NC contacts, rated for 40 A at 230 V AC with a 230 V AC coil. It handles up to 440 V max, so it's sized for standard single-phase or line-to-line loads in a control panel. The IP20 enclosure means it's for dry, enclosed spaces — no washdown areas. The 40 A operational current at AC rated value is the headline number — that's the continuous current the main contacts can carry in normal AC service, not a surge or motor-start rating. The 4 NC contacts are all normally closed, so this contactor is wired for loads that are ON by default and switched OFF by the coil. The 230 V AC coil voltage matches a standard control transformer or line supply; the 440 V max across the contacts gives headroom for 400 V line-to-line systems. The 4 000 W switching capacity for incandescent lamp loads tells you it can handle tungsten inrush without welding contacts. ## Mounting and thermal note Supplementary devices can be installed on the contactor, so you can add auxiliary contact blocks or surge suppressors without extra DIN rail.","metaTitle":"Siemens 5TT5843-0 SENTRON Insta Contactor, 4 NC, 40 A, 230 V","metaDescription":"Siemens SENTRON 5TT5843-0 Insta contactor with 4 NC contacts, rated 40 A at 230 V AC, 440 V max. Active production. IP20. 3 MW units. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"71 mm","Width":"54 mm","Height":"90 mm","Maximum":"440 V","Minimum":"440 V","Rated Value":"230 V","lifecycle_stage":"current","Installation Depth":"0 mm","Product Brand Name":"SENTRON","Product Designation":"Insta contactor","Rated Value Maximum":"230 V","protection class IP":"IP20","Design Of The Product":"4 NC contacts","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","Product Extension Installable Supplementary Devices":"Yes","Type Of Voltage Of The Operating Voltage For Actuation":"AC","Switching Capacity Active Power With Incandescent Lamp Load":"4 000 W","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":"$112.24","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=250364&mlfb=5TT5843-0","alternativesUrl":"https://aoctrl.com/api/mcp/products/5TT5843-0/alternatives.json"},"ai":{"faq":[{"question":"What are the key dimensions and mounting details?","answer":"Width is 54 mm (3 modular width units), height is 90 mm, depth is 71 mm. It mounts on a DIN rail and requires spacers for heat dissipation. IP20 rated for indoor panel use."},{"question":"What is the contact configuration and rating?","answer":"4 NC contacts, 0 NO contacts. Rated operational current is 40 A at AC voltage. Maximum voltage across contacts is 440 V. Coil is 230 V AC. Switching capacity for incandescent lamp loads is 4 000 W."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5TT5843-0","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/5TT5843-0 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}}