{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV1902-1AB4","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV1902-1AB4","canonicalUrl":"https://aoctrl.com/siemens/3RV1902-1AB4","factsUrl":"https://aoctrl.com/api/mcp/products/3RV1902-1AB4","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS undervoltage release, 24 V DC, for circuit breaker sizes S00 through S3, snap-on mounting, IP20 finger-safe front, 68 mm depth, 18.5 mm width.","salesMarkdown":"It is designed for use with Siemens SIRIUS 3RV1 and 3RV2 circuit breakers in frame sizes S00, S0, S2, and S3. The release is rated 24 V DC control voltage and snaps onto the breaker's side via the standard DIN-rail-compatible snap-on mounting, so it integrates directly into a panel without extra brackets or wiring channels. The 24 V DC control supply means this release is intended for low-voltage DC control circuits — common in PLC-driven panels where 24 V DC is the standard control voltage. The 690 V rated insulation voltage (degree of pollution 3) tells you it is safe to install in a motor starter panel where the main circuit operates at up to 690 V AC, a typical industrial supply in many regions. The IP20 front protection with finger-safe touch protection per IEC 60529 means the front of the release is safe for operators to be near; the panel itself still needs an enclosure for the live terminals. Snap-on mounting onto the side of the circuit breaker — no tools needed, no DIN-rail slot consumed. The release measures 68 mm deep, 18.5 mm wide, and 90 mm high. The narrow width (18.5 mm) means it adds minimal footprint to the breaker assembly, which matters when you are packing multiple motor starters into a control cabinet.","metaTitle":"Siemens 3RV1902-1AB4 SIRIUS Undervoltage Release, 24 V DC, S","metaDescription":"Siemens SIRIUS 3RV1902-1AB4 undervoltage release, 24 V DC, for S00-S3 breakers. Phased out; successor 3RV2902-1AB4. Sourced to order. IP20, snap-on mount.","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","Rated Value":"24 V","During Storage":"-50 ... +80 °C","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","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":"DC","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=416609&mlfb=3RV1902-1AB4","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV1902-1AB4/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RV1902-1AB4 and get a price?","answer":"This part is sourced through independent distribution channels. Submit an RFQ; availability and current pricing are confirmed at quote time."},{"question":"What is the depth of 3RV1902-1AB4?","answer":"The depth is 68 mm."},{"question":"What is the width of 3RV1902-1AB4?","answer":"The width is 18.5 mm."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV1902-1AB4","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/3RV1902-1AB4 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}}