{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA1120-1EA23-0AT6","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA1120-1EA23-0AT6","canonicalUrl":"https://aoctrl.com/siemens/3RA1120-1EA23-0AT6","factsUrl":"https://aoctrl.com/api/mcp/products/3RA1120-1EA23-0AT6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RA1120-1EA23-0AT6, nonreversing combination starter, frame size S0, 2.8-4 A, 277 VAC control voltage, DIN/panel mount, UL listed.","salesMarkdown":"The Siemens 3RA1120-1EA23-0AT6 is a nonreversing combination starter from the SIRIUS S0 frame family, rated for 2.8-4 A with a 277 VAC control voltage. It integrates a motor starter protector (MSP) and contactor in one DIN-rail or panel-mount package, sized for the S0 frame — the mid-range footprint in the SIRIUS lineup, common in IEC control panels for motor loads up to 4 A. The 2.8-4 A setting range covers the motor full-load current adjustment band for small IEC motors — typically 0.75 kW to 1.5 kW at 400 V three-phase. The 277 VAC control coil is a North American common voltage for industrial control transformers; verify your panel's control bus matches before wiring. The combination starter ships without auxiliary contacts on either the MSP or contactor side, so if you need status feedback or a holding circuit interlock, plan to add the S0-format auxiliary contact block separately. The S0 frame width (45 mm) fits one 9 mm module per pole — four poles wide — leaving room for adjacent devices on the same rail. Submit an RFQ for a firm commitment on price and lead time. Listed under UL File E156943 in Volume 1, Section 14 — this is the UL listing for industrial control equipment, meaning the combination starter has passed UL 508 (now UL 60947-4-1) testing for motor-controller duty. That UL file covers the SIRIUS S0 family, so the 3RA1120-1EA23-0AT6 is accepted for North American installations requiring a UL-listed motor starter.","metaTitle":"Siemens 3RA1120-1EA23-0AT6 SIRIUS Combination Starter","metaDescription":"Siemens 3RA1120-1EA23-0AT6 SIRIUS S0 combination starter, nonreversing, 2.8-4 A, 277 VAC control. Current lifecycle stage. Sourced to order. UL listed.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Motor Starters"],"specifications":{"lifecycle_stage":"current"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=183865&mlfb=3RA1120-1EA23-0AT6","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RA1120-1EA23-0AT6/alternatives.json"},"ai":{"faq":[{"question":"Is the 3RA1120-1EA23-0AT6 UL listed?","answer":"Yes, it is UL listed under File E156943 in Volume 1, Section 14, covering the SIRIUS S0 combination starter family for North American installations."},{"question":"What is the difference between the 3RA1120 and 3RA1121?","answer":"The 3RA1120 is a nonreversing combination starter; the 3RA1121 is the reversing version. Both share the same S0 frame, current range, and control voltage options, but the 3RA1121 includes a mechanical interlock and two contactors for forward/reverse motor control."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA1120-1EA23-0AT6","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/3RA1120-1EA23-0AT6 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}}