{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RB1036-1QB0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RB1036-1QB0","canonicalUrl":"https://aoctrl.com/siemens/3RB1036-1QB0","factsUrl":"https://aoctrl.com/api/mcp/products/3RB1036-1QB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RB1 solid-state overload relay, 6-25 A, class 10, screw connection, size S2, manual-automatic reset, for contactor mounting.","salesMarkdown":"The Siemens 3RB1036-1QB0 is a solid-state overload relay from the SIRIUS 3RB1 series, rated for 6 to 25 A with a Class 10 trip curve. It mounts directly onto a contactor of size S2 using screw connections, and offers both manual and automatic reset modes. The solid-state design means no bimetal drift over time — the trip characteristic stays consistent across the relay's service life, which matters for repeatable motor protection in production lines. The 6 to 25 A range covers common small-to-medium motor sizes on 400 V three-phase systems. The size S2 contactor footprint is the physical interface: this relay bolts onto the contactor's top or side mounting slots, not onto a DIN rail directly. Screw connections mean field wiring with ring or fork terminals; no push-in or spring-cage tooling required. ## Deployment context This relay is designed for panel-mounting as part of a motor starter assembly — the contactor carries the main power, and the 3RB1 provides the overload protection. The manual-automatic reset selector lets the commissioning engineer choose between latching on trip (manual reset) for attended lines or auto-reset for remote/unattended installations. The solid-state output avoids the mechanical wear of a traditional bimetal relay, so it's a good fit for high-cycle applications like conveyors or pumps that cycle frequently.","metaTitle":"Siemens 3RB1036-1QB0 Solid-State Overload Relay, 6-25A, Clas","metaDescription":"Siemens 3RB1036-1QB0 solid-state overload relay, 6-25A, mounts onto contactor, class 10, screw connection, size S2, manual-automatic reset. Lifecycle: current.","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=179084&mlfb=3RB1036-1QB0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RB1036-1QB0/alternatives.json"},"ai":{"faq":[{"question":"What does the 6-25 A rating and Class 10 mean for motor protection?","answer":"The 6-25 A adjustable range covers the full-load current of motors in that band. Class 10 means the relay will trip within 10 seconds at six times the set current, which protects the motor during a stall without tripping on normal starting current."},{"question":"Does this relay mount on a DIN rail or directly onto a contactor?","answer":"It mounts directly onto a size S2 contactor using screw connections, not onto a DIN rail. The contactor itself typically mounts on the DIN rail or panel, and the relay attaches to it."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RB1036-1QB0","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/3RB1036-1QB0 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}}