{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV5921-1M","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV5921-1M","canonicalUrl":"https://aoctrl.com/siemens/3RV5921-1M","factsUrl":"https://aoctrl.com/api/mcp/products/3RV5921-1M","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS short-circuit signalling switch, 3RV5921-1M, for 3RV5/3RV6 motor circuit breakers size S2, S3, with 2 auxiliary contacts, snap-on mounting, 690 V insulation voltage.","salesMarkdown":"The Siemens 3RV5921-1M is a short-circuit signalling switch designed to mount directly onto 3RV5 and 3RV6 motor circuit breakers in sizes S2 and S3. It provides remote indication that the breaker has tripped on a short-circuit event, using its two auxiliary contacts to signal back to a PLC or status lamp. The snap-on mounting means it clips onto the breaker body without extra hardware, keeping the DIN-rail layout compact. Rated insulation voltage of 690 V AC at pollution degree 3 means this switch is rated for the full 400/480/690 V industrial panel environment common in motor control centres. The 18.5 mm width and 68 mm depth let it sit flush against the breaker face without protruding past the enclosure gland plate. Operating temperature range of -20 to +60 °C covers unheated plant floors and enclosed cabinets; storage range of -50 to +80 °C covers shipping and warehouse conditions. The 50/60 Hz rating confirms it works on either mains frequency without derating.","metaTitle":"Siemens 3RV5921-1M SIRIUS Short-Circuit Signalling Switch, 6","metaDescription":"Siemens 3RV5921-1M SIRIUS short-circuit signalling switch for 3RV5/3RV6 motor circuit breakers. 690 V insulation, snap-on DIN mount, 2 auxiliary contacts. Current production. Sourc","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":"Short-circuit signaling switch","Suitability For Use":"motor circuit breaker","Design Of The Product":"with 2 auxiliary contacts","Size Of The Circuit-Breaker":"S00, S0, S2, S3","Insulation Voltage Rated Value":"690 V","Design Of Short-Circuit Protection":"fuse","reference code according to EN 61346-2":"F","Type Of Voltage Of The Control Supply Voltage":"AC","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":"https://cdn.aoctrl.com/2eb367e10eb3d2fffa55e0f9dc093e1e.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=621631&mlfb=3RV5921-1M","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV5921-1M/alternatives.json"},"ai":{"faq":[{"question":"What is the width and depth of 3RV5921-1M?","answer":"Width is 18.5 mm; depth is 68 mm. The height is 90 mm. These dimensions allow it to mount flush against the face of the 3RV5/3RV6 breaker without extending beyond the DIN-rail envelope."},{"question":"How do I get pricing and availability for 3RV5921-1M?","answer":"This part is sourced to order against an RFQ through independent distribution. Submit a request for quote (RFQ) to confirm current pricing and availability; figures are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV5921-1M","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/3RV5921-1M 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}}