{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RB1066-2GG0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RB1066-2GG0","canonicalUrl":"https://aoctrl.com/siemens/3RB1066-2GG0","factsUrl":"https://aoctrl.com/api/mcp/products/3RB1066-2GG0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 3RB10 series solid-state overload relay, 55-250A, class 20, MOD.S10/S12, with mounting rails for contactor mounting on 3RT106 or separate mounting.","salesMarkdown":"The Siemens 3RB1066-2GG0 is a solid-state overload relay from the 3RB10 series, rated 55-250A with trip class 20. It comes with mounting rails designed for direct attachment to 3RT106 contactors or for separate panel mounting. The MOD.S10/S12 designation indicates the modular accessory interface for communication modules or remote reset options. The 55-250A adjustable range covers motor full-load currents from about 55 A up to 250 A. Class 20 trip means the relay allows 600% of the set current for up to 20 seconds before tripping — sized for motors with moderate starting inertia like pumps, fans, and compressors. A class 10 or 10A relay would trip faster and nuisance-trip on higher-inertia starts; class 30 gives more hold time for heavy flywheel loads. For the typical 200 A motor circuit, set the dial to the nameplate FLA and the class 20 curve protects the winding without nuisance trips on across-the-line starts.","metaTitle":"Siemens 3RB1066-2GG0 Solid-State Overload Relay, 55-250A","metaDescription":"Siemens 3RB1066-2GG0 solid-state overload relay, 55-250A, class 20, current lifecycle stage. Sourced to order against RFQ through independent distribution.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Overload Relays"],"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=240514&mlfb=3RB1066-2GG0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RB1066-2GG0/alternatives.json"},"ai":{"faq":[{"question":"What is the current range and trip class of 3RB1066-2GG0?","answer":"The 3RB1066-2GG0 is adjustable from 55 A to 250 A with a trip class 20 curve, suitable for motor full-load currents in that range."},{"question":"Can I mount 3RB1066-2GG0 directly on a contactor?","answer":"Yes, the relay includes mounting rails for direct attachment to Siemens 3RT106 contactors, or it can be mounted separately on a DIN rail or panel."},{"question":"Where can I buy 3RB1066-2GG0?","answer":"The 3RB1066-2GG0 is sourced to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RB1066-2GG0","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/3RB1066-2GG0 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}}