{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV2902-4AP0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV2902-4AP0","canonicalUrl":"https://aoctrl.com/siemens/3RV2902-4AP0","factsUrl":"https://aoctrl.com/api/mcp/products/3RV2902-4AP0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS undervoltage release, 3RV2902-4AP0, 230V AC/50Hz 240V AC/60Hz, ring cable lug connection, for 3RV2 motor circuit breakers, snap-on mounting.","salesMarkdown":"The Siemens 3RV2902-4AP0 is a SIRIUS undervoltage release — an accessory that drops the motor circuit breaker when control voltage falls below the dropout threshold. It's designed specifically for the 3RV2 family of motor circuit protectors in sizes S00, S0, S2, and S3. Control voltage is 230 V AC at 50 Hz, 240 V AC at 60 Hz, with a 50-60 Hz frequency range. Connection is via ring terminal lugs, not screw terminals — factor that into your panel wiring plan if you're swapping from a different release type. ## Mounting and fit Depth is 68 mm, height 90 mm. Rated for pollution degree 3 environments (industrial atmospheres with conductive or dry non-conductive pollution). Insulation voltage rated at 690 V AC at that pollution degree. RoHS compliance date of 05/01/2012 is on file. Reference code per EN 61346-2 is F (protective device). ## Performance and switching Maximum break time is 20 ms — fast enough to clear a fault before the motor circuit breaker's own trip mechanism reaches its thermal limit. No leading or instantaneous auxiliary contacts on this variant (0 each), so it's a pure undervoltage function without status feedback. Short-circuit protection design assumes a fuse upstream — not a separate magnetic trip. The release itself is not a circuit breaker; it's a shunt-trip accessory that triggers the breaker's mechanical latch.","metaTitle":"Siemens 3RV2902-4AP0 SIRIUS Undervoltage Release, 230V AC","metaDescription":"Siemens 3RV2902-4AP0 SIRIUS undervoltage release for 3RV2 motor circuit breakers. 230V AC/50Hz, 240V AC/60Hz, snap-on DIN rail mount, ring lug terminals. Active production, quoted","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Motor Protection Circuit Breakers (MPCB)"],"specifications":{"Depth":"68 mm","Width":"19 mm","Height":"90 mm","Rated Value":"690 V","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":"230 V","at 60 Hz rated value":"240 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":"ring terminal lug connection","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":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/4397c8beee4f3bfaa400f0b9f81c4805.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=128129&mlfb=3RV2902-4AP0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV2902-4AP0/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV2902-4AP0","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/3RV2902-4AP0 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}}