{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RB1025-2PB0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RB1025-2PB0","canonicalUrl":"https://aoctrl.com/siemens/3RB1025-2PB0","factsUrl":"https://aoctrl.com/api/mcp/products/3RB1025-2PB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RB1025-2PB0 electronic overload relay, 1.5...6 A, class 20, screw connection, manual reset only, size S0 for contactor mounting.","salesMarkdown":"The Siemens 3RB1025-2PB0 is an electronic overload relay from the SIRIUS 3RB family, rated for motor protection in the 1.5...6 A adjustment range. It mounts directly on a contactor in size S0, using screw terminals for the power and control wiring. The trip class is class 20, meaning it allows a 20-second thermal memory before tripping — a standard fit for standard-start induction motors driving pumps, fans, and conveyors where the starting transient is moderate. The 1.5...6 A current range covers a common band of small to medium motor FLC values. Class 20 trip characteristic means the relay tolerates the inrush of a direct-on-line motor start without nuisance tripping, but still protects against sustained overloads. The manual reset only configuration — no auto-reset — is deliberate: after a trip, someone must physically press the reset button, which is standard practice for unattended or safety-monitored machinery where automatic restart could be hazardous. Size S0 is the physical footprint for contactor mounting. This relay clips onto the matching S0 contactor without additional wiring between the contactor and the overload block — the power pass-through is internal. Screw connections are the termination method.","metaTitle":"Siemens 3RB1025-2PB0 Electronic Overload Relay, 1.5...6A, Cl","metaDescription":"Siemens 3RB1025-2PB0 electronic overload relay, 1.5...6A, class 20, screw connection, manual reset, size S0. Active 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=203490&mlfb=3RB1025-2PB0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RB1025-2PB0/alternatives.json"},"ai":{"faq":[{"question":"What is the adjustment range and trip class of 3RB1025-2PB0?","answer":"The adjustment range is 1.5...6 A, and the trip class is class 20, which provides a 20-second thermal memory before tripping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RB1025-2PB0","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/3RB1025-2PB0 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}}