{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RB1246-1QM31","brand":"Siemens","brandSlug":"siemens","productSlug":"3RB1246-1QM31","canonicalUrl":"https://aoctrl.com/siemens/3RB1246-1QM31","factsUrl":"https://aoctrl.com/api/mcp/products/3RB1246-1QM31","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RB1246-1QM31 solid-state overload relay, 6.3-25 A, 220-240 VAC 50/60 Hz, integrated thermistor protection, internal earth-fault detection, bistable outputs.","salesMarkdown":"The Siemens 3RB1246-1QM31 is a solid-state overload relay from the SIRIUS series, designed for motor protection in control panels. It covers a current range of 6.3 to 25 A on a 220 to 240 VAC supply at 50/60 Hz. This unit integrates thermistor (PTC) motor protection and internal earth-fault detection into a single device, reducing wiring and panel space compared to separate protection modules. The bistable outputs — 1NO/1NC for overload/thermistor/earth-fault and 1NO/1NC for overload warning — latch their state after a trip, so the relay holds the fault indication even if control power is lost. The current lifecycle status removes the urgency of last-time-buy planning for this order code. The 6.3 to 25 A setting range covers standard IEC frame-size motor ratings from about 3 kW to 11 kW at 400 V. The 220-240 VAC control supply is the relay's own operating voltage, not the motor circuit — it powers the internal electronics and the bistable output coils. Integrated earth-fault detection means this relay monitors for leakage to ground without a separate core-balance CT, which simplifies the panel wiring. The thermistor input allows direct connection of PTC sensors embedded in the motor windings, providing overtemperature protection beyond what a bimetallic overload curve can sense.","metaTitle":"Siemens 3RB1246-1QM31 solid-state overload relay, 6.3-25 A","metaDescription":"Siemens 3RB1246-1QM31 solid-state overload relay with thermistor protection, 6.3-25 A, 220-240 VAC, internal earth-fault detection. Current lifecycle stage.","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=364559&mlfb=3RB1246-1QM31","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RB1246-1QM31/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings of the 3RB1246-1QM31?","answer":"The relay is rated for 6.3 to 25 A, operates on 220 to 240 VAC 50/60 Hz, and includes integrated thermistor protection, internal earth-fault detection, and bistable output contacts (1NO/1NC for trip and 1NO/1NC for warning)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RB1246-1QM31","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/3RB1246-1QM31 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}}