{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV1901-1F","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV1901-1F","canonicalUrl":"https://aoctrl.com/siemens/3RV1901-1F","factsUrl":"https://aoctrl.com/api/mcp/products/3RV1901-1F","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, transverse auxiliary switch, screw terminal, 2 NO, for circuit breaker sizes S00–S3, 45 mm width, 17 mm depth, 12 mm height, switching capacity 1 A at 24 V.","salesMarkdown":"The Siemens SIRIUS 3RV1901-1F is a transverse auxiliary switch designed to mount on the front of SIRIUS circuit breakers in sizes S00, S0, S2, and S3. It provides two normally open (NO) instantaneous contacts via screw-type terminals, intended for signaling or control interlocking within the breaker's footprint. ## Switching capacity and contact ratings The auxiliary contacts are rated for 1 A at 24 V, 0.3 A at 48 V, 0.15 A at 60 V, and 0.5 A at 230 V. The maximum operational current under AC-12 duty is 2.5 A. These ratings define the load the switch can reliably break — at 24 V it handles a full amp, but at 60 V the current limit drops to 0.15 A, typical for DC switching where arc extinction is more demanding. For a 24 VDC pilot circuit, the 1 A rating gives enough headroom for a small contactor coil or indicator lamp. ## Physical integration and wiring The switch measures 45 mm wide by 17 mm deep by 12 mm high, and fastens via plug-in fixing directly onto the front of the breaker — no DIN rail required. The screw-type terminals accept solid or stranded conductors from 0.5 to 2.5 mm², or two conductors per clamp (2x 0.5…1.5 mm² or 2x 0.75…2.5 mm²). For AWG, the terminals accept 18 to 14 AWG. This is a standard panel-building interface; strip length and torque per the breaker's terminal spec apply. The manufacturer lists this part as a phased-out product. The preferred successor is the 3RV2901-1F, which performs the same function — transverse auxiliary switch, 2 NO, screw terminals — for the same breaker sizes. The substance prohibition date of 07/01/2006 aligns with RoHS compliance requirements.","metaTitle":"Siemens 3RV1901-1F SIRIUS Auxiliary Switch, 2 NO, 17 mm Dept","metaDescription":"Siemens SIRIUS 3RV1901-1F transverse auxiliary switch, 2 NO contacts, screw terminals. Rated 1 A at 24 V. For circuit breaker sizes S00–S3. Phased-out; successor 3RV2901-1F. Source","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Motor Protection Circuit Breakers (MPCB)"],"specifications":{"Depth":"17 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Width":"45 mm","Height":"12 mm","at 24 V":"1 A","at 48 V":"0.3 A","at 60 V":"0.15 A","at 230 V":"0.5 A","During Storage":"-50 ... +80 °C","lifecycle_stage":"current","During Operation":"-20 ... +60 °C","Fastening Method":"plug-in fixing","Solid Or Stranded":"0.5 ... 2.5 mm²","Product Brand Name":"SIRIUS","Product Designation":"auxiliary switch, transverse on the front","Size Of The Circuit-Breaker":"S00, S0, S2, S3","Substance Prohibitance (Date)":"07/01/2006","for AWG cables for auxiliary contacts":"2x (18 ... 14)","Finely Stranded With Core End Processing":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","operational current of auxiliary contacts at AC-12 maximum":"2.5 A","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","number of NO contacts for auxiliary contacts instantaneous contact":"2","AWG number as coded connectable conductor cross section for auxiliary contacts":"18 ... 14"}},"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=163223&mlfb=3RV1901-1F","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV1901-1F/alternatives.json"},"ai":{"faq":[{"question":"What replaces the 3RV1901-1F?","answer":"The official successor is the 3RV2901-1F, a transverse auxiliary switch with 2 NO contacts and screw terminals for the same SIRIUS breaker sizes S00 through S3."},{"question":"What are the key ratings of the 3RV1901-1F?","answer":"The auxiliary switch provides 2 NO contacts rated 1 A at 24 V, 0.3 A at 48 V, 0.15 A at 60 V, and 0.5 A at 230 V, with a maximum AC-12 operational current of 2.5 A. It accepts conductors from 0.5 to 2.5 mm² via screw terminals."},{"question":"Where can I buy the 3RV1901-1F?","answer":"The 3RV1901-1F is sourced to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time."},{"question":"Will the 3RV1901-1F fit a panel designed for the 3RH2122-1AC60?","answer":"No. The 3RV1901-1F is a front-mounted auxiliary switch for SIRIUS circuit breakers, while the 3RH2122-1AC60 is a standalone auxiliary contactor with a different mounting method (DIN rail) and larger dimensions (73 mm depth, 57.5 mm height). They are not mechanically interchangeable."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV1901-1F","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/3RV1901-1F 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}}