{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV1901-1A","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV1901-1A","canonicalUrl":"https://aoctrl.com/siemens/3RV1901-1A","factsUrl":"https://aoctrl.com/api/mcp/products/3RV1901-1A","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS lateral auxiliary switch, 3RV1901-1A, 1 NO + 1 NC, 10 A maximum, plug-in fixing for circuit breaker sizes S00 through S3.","salesMarkdown":"The Siemens 3RV1901-1A is a lateral auxiliary switch from the SIRIUS product family, designed as a side-mount accessory for 3RV circuit breakers in frame sizes S00, S0, S2, and S3. It provides one normally-open and one normally-closed instantaneous auxiliary contact, rated for a maximum thermal current of 10 A. The auxiliary contacts carry voltage-dependent ratings that govern real-world switching: 2 A at 24 V, 0.5 A at 110 V, 0.25 A at 220 V, 4 A at 230 V, 3 A at 400 V, and 10 A at 690 V. The AC-15 rating at 690 V is 1 A, which is the utilization category for switching electromagnetic loads (contactors, relays) — that's the figure to use when sizing for inductive control circuits at that voltage. Mounting is plug-in fixing onto the side of the breaker — no DIN rail footprint, no tools required for attachment. The screw-type terminals accept solid or finely stranded conductors: 2x (0.5... 1.5 mm²) or 2x (0.75... 2.5 mm²), with the same range for wire ends with core-end processing. AWG equivalents are 2x (18... 14). ## Environmental limits ## Lifecycle status and sourcing The 3RV1901-1A is a phased-out product. The official Siemens successor is the SIRIUS 3RV2901-1A, which is the preferred replacement type.","metaTitle":"Siemens 3RV1901-1A SIRIUS Lateral Auxiliary Switch, 1NO+1NC,","metaDescription":"Siemens 3RV1901-1A SIRIUS lateral auxiliary switch, 1 NO + 1 NC, 10A max, for breaker sizes S00-S3. Phased out; successor 3RV2901-1A. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Motor Protection Circuit Breakers (MPCB)"],"specifications":{"Depth":"70mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Width":"9.5mm","Height":"90mm","Maximum":"10A","at 24 V":"2A","at 110 V":"0.5A","at 220 V":"0.25A","at 230 V":"4A","at 400 V":"3A","at 690 V":"10A","During Storage":"-50 ... +80°C","lifecycle_stage":"current","During Operation":"-20 ... +60°C","Fastening Method":"plug-in fixing","Product Brand Name":"SIRIUS","Product Designation":"auxiliary switch, lateral","Design Of The Product":"lateral auxiliary switches","With Core End Processing":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Size Of The Circuit-Breaker":"S00, S0, S2, S3","at AC-15 at 690 V rated value":"1A","at AWG cables for auxiliary contacts":"2x (18 ... 14)","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":"1","number of NO contacts for auxiliary contacts instantaneous contact":"1"}},"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=170879&mlfb=3RV1901-1A","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV1901-1A/alternatives.json"},"ai":{"faq":[{"question":"What is the 3RV1901-1A used for?","answer":"It is a lateral auxiliary switch that mounts on the side of Siemens SIRIUS 3RV circuit breakers in frame sizes S00 through S3, providing one NO and one NC auxiliary contact for status signaling or control interlocking."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV1901-1A","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/3RV1901-1A 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}}