{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV1902-1AQ0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV1902-1AQ0","canonicalUrl":"https://aoctrl.com/siemens/3RV1902-1AQ0","factsUrl":"https://aoctrl.com/api/mcp/products/3RV1902-1AQ0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS undervoltage release, 3RV1902-1AQ0, 380 V AC 50 Hz, for circuit breaker sizes S00, S0, S2, S3, snap-on mounting, 18.5 mm wide, 68 mm deep.","salesMarkdown":"The Siemens 3RV1902-1AQ0 is a SIRIUS undervoltage release designed for motor circuit breakers in frame sizes S00, S0, S2, and S3. It operates on a 380 V AC control supply at 50 Hz, tripping the breaker when the control voltage drops below its dropout threshold — a standard safety interlock for motor starters that prevents automatic restart after a supply dip. This is a phased-out product. The manufacturer's stated successor is the SIRIUS 3RV2 series, which consolidates the undervoltage release function into a newer platform with updated ratings and a different physical interface. The 18.5 mm width and 68 mm depth mean it occupies a single modular slot, leaving adjacent spaces free for auxiliary contact blocks or other add-ons. The 90 mm height is standard for the S00–S3 frame accessory footprint.","metaTitle":"Siemens 3RV1902-1AQ0 SIRIUS Undervoltage Release, 380 V AC 5","metaDescription":"Siemens SIRIUS 3RV1902-1AQ0 undervoltage release for circuit breaker sizes S00–S3. Rated 380 V AC 50 Hz. Phased-out; successor is 3RV2 series. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Motor Protection Circuit Breakers (MPCB)"],"specifications":{"Depth":"68 mm","Width":"18.5 mm","Height":"90 mm","During Storage":"-50 ... +80 °C","lifecycle_stage":"current","During Operation":"-20 ... +60 °C","Fastening Method":"snap-on mounting","Final Rated Value":"60 Hz","Product Brand Name":"SIRIUS","Degree Of Pollution":"3","Initial Rated Value":"50 Hz","Product Designation":"undervoltage release","Suitability For Use":"motor circuit breaker","at 50 Hz rated value":"380 V","Size Of The Circuit-Breaker":"S00, S0, S2, S3","Insulation Voltage Rated Value":"690 V","Design Of Short-Circuit Protection":"fuse","reference code according to EN 61346-2":"F","Type Of Voltage Of The Control Supply Voltage":"AC","number of NO contacts for auxiliary contacts leading contact":"0","insulation voltage with degree of pollution 3 at AC rated value":"690 V","number of CO contacts of auxiliary contacts instantaneous contact":"0","number of NC contacts for auxiliary contacts instantaneous contact":"0","number of NO contacts for auxiliary contacts instantaneous contact":"0"}},"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=18524&mlfb=3RV1902-1AQ0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV1902-1AQ0/alternatives.json"},"ai":{"faq":[{"question":"What are the key dimensions of 3RV1902-1AQ0?","answer":"Width is 18.5 mm, depth is 68 mm, height is 90 mm. It snaps onto a 35 mm DIN rail and occupies one modular slot in the panel."},{"question":"Where can I buy 3RV1902-1AQ0?","answer":"This part is sourced and quoted to order against an RFQ through independent industrial distribution. Availability and current pricing are confirmed at the time of quotation."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV1902-1AQ0","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/3RV1902-1AQ0 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}}