{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RU5156-2XB2","brand":"Siemens","brandSlug":"siemens","productSlug":"3RU5156-2XB2","canonicalUrl":"https://aoctrl.com/siemens/3RU5156-2XB2","factsUrl":"https://aoctrl.com/api/mcp/products/3RU5156-2XB2","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RU5156-2XB2 thermal overload relay, 80-110 A, size S6, Class 10, 3-pole, screw terminals main and auxiliary circuits, manual/auto reset.","salesMarkdown":"The Siemens SIRIUS 3RU5156-2XB2 is a thermal overload relay rated 80-110 A in size S6, Class 10 trip curve, for three-phase motor protection. It mounts directly to a contactor or standalone on a DIN rail, protecting the motor branch from sustained overcurrents by simulating the motor's thermal response. The 80-110 A setting range covers motor FLA from 80 A up to 110 A, so it pairs with contactors and motors in that current band — typically 45-55 kW at 400 V depending on duty. The 3-pole main circuit matches standard three-phase motor feeds. Surge voltage resistance of 8 kV on the main circuit means it withstands switching transients common in industrial panels without flashover. The auxiliary circuit uses screw terminals, same as the main circuit — no need for separate tooling on the control wiring. Lifecycle stage is marked as current, meaning Siemens still produces this relay as an active catalog item. No phase-out or last-time-buy notice is attached to this order code. The RoHS compliance date of 09/03/2013 confirms it meets EU substance restrictions for current builds. ## Environmental and handling limits Storage temperature spans -55 to +80 °C, which covers most warehouse and shipping conditions. Operating humidity range of 0 to 90 % suits non-condensing environments inside a standard IP54 or better enclosure. The relay operates on 50/60 Hz supply — no frequency derating needed between the two.","metaTitle":"Siemens 3RU5156-2XB2 SIRIUS Thermal Overload Relay, 80-110 A","metaDescription":"Siemens SIRIUS 3RU5156-2XB2 thermal overload relay, 80-110 A, size S6, Class 10, 3-pole, screw terminals, 8 kV surge, active production. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Overload Relays"],"specifications":{"title":"3RU5156-2XB2","Per Pole":"0 W","description":"Thermal overload relay 80-110 A size S6, class 10 for motor protection for single mounting main circuit: screw terminal AUX. circuit: screw terminal manual automatic reset","lifecycle_stage":"current","During Transport":"-55 ... +80 °C","Product Brand Name":"SIRIUS","Product Designation":"Thermal overload relay","Substance Prohibitance (Date)":"09/03/2013","Operating Frequency Rated Value":"50 ... 60 Hz","Relative Humidity During Operation":"0 ... 90 %","Surge Voltage Resistance Rated Value":"8 kV","Number Of Poles For Main Current Circuit":"3"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/d74b99b11394ff7f38af5b4a90717ca2.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=621463&mlfb=3RU5156-2XB2"},"ai":{"faq":[{"question":"What is the rated current range and trip class?","answer":"The relay is rated 80-110 A with a Class 10 trip characteristic, meaning it trips within 10 seconds at 7.2× the set current."},{"question":"Does the 3RU5156-2XB2 use screw terminals or spring terminals?","answer":"Both the main circuit and auxiliary circuit use screw terminals, so no spring-cage tooling is required for wiring."},{"question":"What compliance documentation is available for this relay?","answer":"The RoHS compliance date is 09/03/2013, and the relay carries Siemens SIRIUS approvals for IEC/EN 60947 applications. Specific UL/CSA listings are not detailed in this record but are standard for the SIRIUS family."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RU5156-2XB2","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/3RU5156-2XB2 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}