{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV2902-1AV1","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV2902-1AV1","canonicalUrl":"https://aoctrl.com/siemens/3RV2902-1AV1","factsUrl":"https://aoctrl.com/api/mcp/products/3RV2902-1AV1","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS undervoltage release, 415 V AC/50 Hz, 480 V AC/60 Hz, screw terminal, for 3RV2 circuit breaker, snap-on mounting, 68 x 19 x 90 mm.","salesMarkdown":"The Siemens 3RV2902-1AV1 is a SIRIUS undervoltage release designed specifically for 3RV2 motor circuit breakers. It drops the breaker when the control supply voltage falls below its dropout threshold, providing undervoltage protection for motor loads. It snaps onto the same DIN rail as the breaker, occupying minimal panel width at 19 mm. ## Voltage ratings and application fit The control supply is AC only, 50 to 60 Hz, so this release is not compatible with DC control circuits. Maximum break time is 20 ms, fast enough to clear the breaker before motor speed drops into a damaging regime. ## Mechanical integration and wiring The release fits the same rail footprint as the 3RV2 breaker it serves. Dimensions are 68 mm deep, 19 mm wide, 90 mm tall — the narrow width means it doesn't consume an extra module position beyond the breaker's own width. Wiring is via screw-type terminals for the auxiliary and control circuit. The release has no auxiliary contacts (zero CO, zero NC instantaneous contacts), so it does not provide a status feedback signal to a PLC or indicator light. If feedback is needed, a separate auxiliary contact block must be added to the breaker assembly. ## Compatibility with 3RV2 breaker sizes This undervoltage release is listed for use with 3RV2 circuit breakers in frame sizes S00, S0, S2, and S3. That covers the full SIRIUS motor-protective breaker range from the smallest S00 (up to about 16 A motor full-load current) through the S3 (up to about 100 A). The release mounts directly onto the breaker's side without additional adapters. The short-circuit protection design for the release circuit itself is fuse-based — the installer should size the control-circuit fuse per Siemens guidelines.","metaTitle":"Siemens 3RV2902-1AV1 SIRIUS Undervoltage Release, 415V AC/50","metaDescription":"Siemens SIRIUS 3RV2902-1AV1 undervoltage release for 3RV2 motor circuit breakers. 415V AC/50Hz, 480V AC/60Hz, screw terminals, snap-on DIN rail. Active production, available to ord","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Motor Protection Circuit Breakers (MPCB)"],"specifications":{"Depth":"68 mm","Width":"19 mm","title":"3RV2902-1AV1","Height":"90 mm","Rated Value":"690 V","description":"Undervoltage release 415 V AC/50 Hz, 480 V AC/60 Hz with screw terminal for circuit breaker 3RV2","During Storage":"-50 ... +80 °C","Leading Contact":"0","lifecycle_stage":"current","During Operation":"-20 ... +60 °C","Fastening Method":"snap-on mounting","Break Time Maximum":"20 ms","Product Brand Name":"SIRIUS","Degree Of Pollution":"3","Product Designation":"undervoltage release","Suitability For Use":"motor circuit breaker","at 50 Hz rated value":"415 V","at 60 Hz rated value":"480 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":"screw-type 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":"$17.78","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/b8e11c3994cf1e2c9c280acab28744ee.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=417590&mlfb=3RV2902-1AV1"},"ai":{"faq":[{"question":"What is the 3RV2902-1AV1 used for?","answer":"It is an undervoltage release for Siemens SIRIUS 3RV2 motor circuit breakers. It trips the breaker when the control supply voltage drops below the dropout threshold, protecting motor loads from undervoltage conditions."},{"question":"What are the voltage ratings for 3RV2902-1AV1?","answer":"The control supply voltage is 415 V AC at 50 Hz and 480 V AC at 60 Hz. The rated insulation voltage is 690 V with degree of pollution 3. The control supply is AC only, 50 to 60 Hz."},{"question":"Will 3RV2902-1AV1 fit a 3RV6011-0CA10 breaker?","answer":"No, the 3RV2902-1AV1 is designed for 3RV2 series breakers in frame sizes S00, S0, S2, and S3. The 3RV6011-0CA10 is a 3RV6 series breaker with a different mounting interface. These are not mechanically interchangeable without rewiring the panel."},{"question":"Where can I buy the 3RV2902-1AV1?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV2902-1AV1","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/3RV2902-1AV1 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}}