{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV2902-2AV0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV2902-2AV0","canonicalUrl":"https://aoctrl.com/siemens/3RV2902-2AV0","factsUrl":"https://aoctrl.com/api/mcp/products/3RV2902-2AV0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS undervoltage release, 400 V AC/50 Hz, 440 V AC/60 Hz, spring-loaded terminals, snap-on mounting for 3RV2 circuit breakers, 18.5 mm wide.","salesMarkdown":"The Siemens 3RV2902-2AV0 is a SIRIUS undervoltage release designed for use with 3RV2 motor circuit breakers in sizes S00, S0, S2, and S3. It trips the breaker when the control voltage drops below its dropout threshold, preventing automatic restart after a supply interruption — a standard requirement for machine safety circuits and process interlocks. Rated for 400 V AC at 50 Hz and 440 V AC at 60 Hz, the release operates across a 50–60 Hz supply frequency range. The control supply is AC only, so verify your panel's control transformer taps before specifying. Termination is via spring-loaded terminals for the auxiliary and control circuit, which speeds panel wiring and eliminates the need for torque checks on these connections. The unit snap-mounts directly onto the 3RV2 breaker — no additional DIN-rail space required. ## Integration and environmental limits The release measures 90 mm high by 18.5 mm wide by 68 mm deep — the 18.5 mm width matches a single modular unit, so it adds no extra panel width beyond the breaker footprint. Snap-on mounting means it clips onto the breaker's side without tools. This keeps the release coordinated with the breaker's internal clearances. Substance compliance is documented: the RoHS exemption date is May 1, 2012, covering the standard EU RoHS scope. The reference code per EN 61346-2 is F (protective device).","metaTitle":"Siemens 3RV2902-2AV0 SIRIUS undervoltage release, 400 V AC /","metaDescription":"Siemens SIRIUS 3RV2902-2AV0 undervoltage release for 3RV2 circuit breakers. 400 V AC / 440 V AC, spring-loaded terminals, snap-on mounting. Active production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Motor Protection Circuit Breakers (MPCB)"],"specifications":{"Depth":"68 mm","Width":"18.5 mm","Height":"90 mm","Rated Value":"690 V","During Storage":"-50 ... +80 °C","Leading Contact":"0","lifecycle_stage":"current","During Operation":"-20 ... +60 °C","Fastening Method":"snap-on mounting","Product Brand Name":"SIRIUS","Degree Of Pollution":"3","Product Designation":"undervoltage release","Suitability For Use":"motor circuit breaker","at 50 Hz rated value":"400 V","at 60 Hz rated value":"440 V","Instantaneous Contact":"0","Size Of The Circuit-Breaker":"S00, S0, S2, S3","Substance Prohibitance (Date)":"05/01/2012","Control Supply Voltage Frequency 1":"50 ... 60 Hz","Design Of Short-Circuit Protection":"fuse","reference code according to EN 61346-2":"F","with degree of pollution 3 at AC rated value":"690 V","Type Of Voltage Of The Control Supply Voltage":"AC","Type Of Electrical Connection For Auxiliary And Control Circuit":"spring-loaded terminals","number of CO contacts of auxiliary contacts instantaneous contact":"0","number of NC contacts for auxiliary contacts instantaneous contact":"0"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/6eecec68b1fd66475b174075f5f121f7.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=185352&mlfb=3RV2902-2AV0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV2902-2AV0/alternatives.json"},"ai":{"faq":[{"question":"What is the 3RV2902-2AV0 used for?","answer":"It is an undervoltage release for Siemens 3RV2 motor circuit breakers. It trips the breaker when control voltage drops, preventing automatic restart after a power loss — commonly used in machine safety circuits and process interlocks."},{"question":"What voltage does the 3RV2902-2AV0 operate on?","answer":"The release is rated for 400 V AC at 50 Hz and 440 V AC at 60 Hz, with a supply frequency range of 50 to 60 Hz. The control supply is AC only."},{"question":"Where can I buy the 3RV2902-2AV0?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm commitment."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV2902-2AV0","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/3RV2902-2AV0 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}}