{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RB1246-1EM30","brand":"Siemens","brandSlug":"siemens","productSlug":"3RB1246-1EM30","canonicalUrl":"https://aoctrl.com/siemens/3RB1246-1EM30","factsUrl":"https://aoctrl.com/api/mcp/products/3RB1246-1EM30","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RB1246-1EM30 overload relay, 25-100 A, size S2/S3, class 5-30, discontinued product.","salesMarkdown":"The Siemens 3RB1246-1EM30 is a SIRIUS solid-state overload relay rated 25-100 A, sized for S2/S3 contactor frames. It provides full motor protection including ground fault detection, with an integrated current transformer on the main circuit and screw terminals on the auxiliary circuit. The relay offers manual, automatic, or remote reset and a monostable overload warning output. Control voltage is AC 220-240 V, 50/60 Hz. Trip class is selectable 5 through 30. The 25-100 A range covers standard IEC motor ratings from about 7.5 kW up to 45 kW at 400 V. The S2/S3 frame footprint matches Siemens 3RT2 contactors in those sizes — the relay mounts directly to the contactor or individually on a DIN rail. Ground fault detection is built in, so no separate earth-leakage module is needed for the motor circuit. Trip class 5-30 lets you set the overload curve to match the motor's thermal time constant: class 10 for standard motors, class 20 for high-inertia starts, class 30 for very heavy starts.","metaTitle":"Siemens 3RB1246-1EM30 Overload Relay, 25-100 A, Discontinued","metaDescription":"Siemens 3RB1246-1EM30 overload relay, 25-100 A, S2/S3 frame. Discontinued product. Full motor protection with ground fault detection. Sourced to order against RFQ.","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=96007&mlfb=3RB1246-1EM30","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RB1246-1EM30/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy the 3RB1246-1EM30?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at the time of quote. Submit an RFQ for a firm commitment."},{"question":"What is the 3RB1246-1EM30 used for?","answer":"It is a solid-state overload relay for full motor protection, rated 25-100 A, with integrated ground fault detection. It mounts to S2/S3 contactor frames or individually on DIN rail, and is used in motor control centers and industrial panels."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RB1246-1EM30","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/3RB1246-1EM30 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}}