{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV2902-1AB0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV2902-1AB0","canonicalUrl":"https://aoctrl.com/siemens/3RV2902-1AB0","factsUrl":"https://aoctrl.com/api/mcp/products/3RV2902-1AB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS undervoltage release, 24 V AC 50/60 Hz, screw-type terminals, snap-on mounting for 3RV2 motor circuit breakers.","salesMarkdown":"It snaps onto the breaker's side via the DIN rail profile, adding zero extra panel width beyond the 19 mm it already occupies. When voltage dips or fails, the release trips the breaker in 20 ms max — fast enough to prevent single-phasing damage on a motor load. Rated 690 V insulation voltage with pollution degree 3 — that's the industrial panel environment: conductive dust, occasional condensation, no derating needed for standard motor control center atmospheres. The operating range of -20 to +60 °C covers most non-conditioned enclosures; storage tolerance of -50 to +80 °C means it survives warehouse extremes without damage. Width of 19 mm is the key dimension for panel fill — it's a single-module-wide accessory that stacks directly against the 3RV2 breaker body. No extra side clearance required for the snap-on mount.","metaTitle":"Siemens 3RV2902-1AB0 SIRIUS undervoltage release, 24 V AC, 5","metaDescription":"Siemens 3RV2902-1AB0 SIRIUS undervoltage release for 3RV2 motor circuit breakers. 24 V AC, 50/60 Hz, screw terminals, snap-on DIN rail. Active production. Sourced to order.","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":"3RV2902-1AB0","Height":"90 mm","Rated Value":"690 V","description":"Undervoltage release 24 V AC, 50/60 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":"24 V","at 60 Hz rated value":"24 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/9395d00903c4eca68123f142fe893847.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=262722&mlfb=3RV2902-1AB0"},"ai":{"faq":[{"question":"What is the 3RV2902-1AB0 used for?","answer":"It's an undervoltage release for Siemens 3RV2 motor circuit breakers. It trips the breaker when the control supply (24 V AC, 50/60 Hz) drops out, protecting motor loads from undervoltage or phase-loss conditions."},{"question":"Where can I buy the 3RV2902-1AB0?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time."},{"question":"Will 3RV2902-1AB0 drop into a panel specified around 3RV6021-4DA10?","answer":"No — the 3RV6021-4DA10 is a full motor circuit breaker (S0 frame, 45 mm wide, 25 A thermal-magnetic), not an accessory. The 3RV2902-1AB0 is a bolt-on undervoltage release for the 3RV2 breaker family; it mounts onto the breaker, not standalone. Different panel cutout and wiring entirely."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV2902-1AB0","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/3RV2902-1AB0 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}}