{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV1912-1CV0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV1912-1CV0","canonicalUrl":"https://aoctrl.com/siemens/3RV1912-1CV0","factsUrl":"https://aoctrl.com/api/mcp/products/3RV1912-1CV0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS undervoltage release, 400 V AC 50 Hz, with 2 NO leading auxiliary contacts, snap-on mounting, for 3RV1011 motor circuit breakers, screw terminals.","salesMarkdown":"It carries 2 NO leading auxiliary contacts that change state ahead of the main contacts, giving the PLC or safety relay a clean status signal before the power circuit opens. The release fits S00, S0, S2, and S3 frame sizes of the motor circuit breaker families. Width is 19 mm and depth is 68 mm. ## Deployment context The leading auxiliary contacts (2 NO) are mechanically linked to the release armature — they close before the breaker trips, so the control system sees the undervoltage condition before the load drops.","metaTitle":"Siemens 3RV1912-1CV0 SIRIUS Undervoltage Release, 400 V AC","metaDescription":"Siemens SIRIUS 3RV1912-1CV0 undervoltage release, 400 V AC 50 Hz, 2 NO leading contacts, snap-on DIN mount. Active production, sourced to order. Request quote.","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":"3RV1912-1CV0","Height":"90 mm","Rated Value":"690 V","description":"Undervoltage release 400 V AC, 50 Hz with leading auxiliary switch 2NO, for circuit breaker 3RV1011","During Storage":"-50 ... +80 °C","Leading Contact":"2","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":"400 V","Design Of The Product":"with 2 auxiliary contacts","Instantaneous Contact":"0","Size Of The Circuit-Breaker":"S00, S0, S2, S3","Substance Prohibitance (Date)":"07/01/2006","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":"$25.40","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/572c0063b5bda69a81968ada9a4131fe.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=500887&mlfb=3RV1912-1CV0"},"ai":{"faq":[{"question":"What is 3RV1912-1CV0 used for?","answer":"It is an undervoltage release for Siemens SIRIUS 3RV10 and 3RV20 motor circuit breakers. When the 400 V AC control supply drops, it trips the breaker and its 2 NO leading contacts signal the condition to the control system before the main contacts open."},{"question":"What frame sizes does 3RV1912-1CV0 fit?","answer":"It fits S00, S0, S2, and S3 frame sizes of the 3RV10 and 3RV20 motor circuit breaker families."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV1912-1CV0","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/3RV1912-1CV0 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}}