{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RB1025-2NB0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RB1025-2NB0","canonicalUrl":"https://aoctrl.com/siemens/3RB1025-2NB0","factsUrl":"https://aoctrl.com/api/mcp/products/3RB1025-2NB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RB1025-2NB0 electronic overload relay, 0.4-1.6A, class 20, screw connection, manual reset, size S0.","salesMarkdown":"The Siemens 3RB1025-2NB0 is an electronic overload relay in the SIRIUS 3RB10 series, sized for motor protection in the 0.4 to 1.6 A range. Class 20 trip curve means it allows a 20-second thermal overload before tripping — matched to standard induction motor startup profiles on pumps, fans, or light conveyors. Mounts directly to a contactor in the S0 frame, saving DIN-rail space inside the panel. The 0.4 to 1.6 A setting range covers small motors — think fractional-horsepower drives or small conveyor sections. Class 20 is the standard thermal memory for general-purpose induction motors; it rides through a normal start without nuisance tripping but still protects against a stalled rotor or sustained overload. Screw connection keeps wiring straightforward for panel builders who prefer a terminal screw over spring-cage. Manual reset only — no auto-reset option, so the relay stays tripped until someone pushes the button. That is deliberate for applications where an unexpected restart could be a safety concern.","metaTitle":"Siemens 3RB1025-2NB0 Electronic Overload Relay, 0.4-1.6A, Cl","metaDescription":"Siemens 3RB1025-2NB0 electronic overload relay, 0.4-1.6A, class 20, screw connection, manual reset, size S0. Current lifecycle stage. 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=430542&mlfb=3RB1025-2NB0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RB1025-2NB0/alternatives.json"},"ai":{"faq":[{"question":"What is the setting range and trip class?","answer":"The setting range is 0.4 to 1.6 A with a class 20 trip curve, suitable for standard induction motor protection."},{"question":"Does this relay support automatic reset?","answer":"No, it is manual reset only — the relay latches after a trip and requires a manual push to reset."},{"question":"How does it mount in a panel?","answer":"It mounts directly to a contactor in the S0 frame size, so no separate DIN-rail footprint is needed."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RB1025-2NB0","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/3RB1025-2NB0 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}}