{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV1902-1AB0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV1902-1AB0","canonicalUrl":"https://aoctrl.com/siemens/3RV1902-1AB0","factsUrl":"https://aoctrl.com/api/mcp/products/3RV1902-1AB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RV1902-1AB0 undervoltage release, 24 V AC 50 Hz, for motor circuit breakers size S00 through S3, IP20 finger-safe front, snap-on mounting.","salesMarkdown":"The Siemens SIRIUS 3RV1902-1AB0 is an undervoltage release (trip coil) designed for motor circuit breakers in the S00, S0, S2, and S3 frame sizes. ## Integration and fit The 18.5 mm width and 68 mm depth mean it occupies one 18 mm module slot on the rail, leaving the adjacent space free for auxiliary contact blocks or other add-ons. The 90 mm height is consistent with the S00–S3 breaker family, so it aligns vertically with the breaker body in a multi-row enclosure. The 24 V AC control voltage at 50 Hz is the coil rating — not a main circuit voltage. This release is wired to a separate control transformer or 24 V supply, not to the motor power circuit. The 690 V insulation rating confirms the coil can be safely installed in a panel with 400 V or 480 V main circuits without additional creepage distance beyond what the degree of pollution 3 rating already accounts for. Because it's designed for motor circuit breakers (not contactors or load switches), the release interfaces with the breaker's internal trip mechanism. It does not carry any auxiliary contacts — the count for NO, NC, and CO contacts is zero on all three types — so any remote status indication must come from a separate auxiliary switch block mounted on the breaker.","metaTitle":"Siemens 3RV1902-1AB0 SIRIUS Undervoltage Release, 24 V AC","metaDescription":"Siemens SIRIUS 3RV1902-1AB0 undervoltage release, 24 V AC 50 Hz, for motor circuit breakers S00-S3. Phased-out; official successor 3RV2902-1AB0. 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":"24 V","Size Of The Circuit-Breaker":"S00, S0, S2, S3","Insulation Voltage Rated Value":"690 V","Design Of Short-Circuit Protection":"fuse","reference code acc. to DIN EN 61346-2":"F","Type Of Voltage Of The Control Supply Voltage":"AC","touch protection on the front acc. to IEC 60529":"finger-safe, for vertical contact from the front","protection class IP on the front acc. to IEC 60529":"IP20","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=202653&mlfb=3RV1902-1AB0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV1902-1AB0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RV1902-1AB0 and get a price?","answer":"This part is sourced to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."},{"question":"Will 3RV1902-1AB0 drop into a panel specified around 3RV1011-0GA10 without rewiring?","answer":"No. The 3RV1902-1AB0 is an undervoltage release accessory for a motor circuit breaker, while the 3RV1011-0GA10 is a complete motor circuit breaker with its own overload and short-circuit protection. They are not form-fit-function interchangeable — the release mounts onto the breaker, not in place of it."},{"question":"What compliance documentation does Siemens provide for 3RV1902-1AB0?","answer":"As a Siemens SIRIUS component, it carries CE marking for the European market and is designed to meet IEC/EN 60947 standards for low-voltage switchgear. RoHS and REACH compliance documentation is typically available through Siemens Industry Online Support."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV1902-1AB0","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/3RV1902-1AB0 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}}