{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV1901-1FA00-0FJ0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV1901-1FA00-0FJ0","canonicalUrl":"https://aoctrl.com/siemens/3RV1901-1FA00-0FJ0","factsUrl":"https://aoctrl.com/api/mcp/products/3RV1901-1FA00-0FJ0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS transverse auxiliary switch, order code 3RV1901-1FA00-0FJ0, 2 NO contacts, screw connection, size S00 - S3.","salesMarkdown":"The Siemens 3RV1901-1FA00-0FJ0 is a transverse auxiliary switch from the SIRIUS family, built for mounting onto S00 through S3-sized contactors and motor starters. It brings two normally open (NO) contacts into the assembly, wired via screw terminals. ## What It Fits and What That Means This switch is sized for the S00 through S3 frame range — that covers the majority of SIRIUS 3RV2 motor starter protectors and 3RT2 contactors up to around 40 A or so, depending on the duty. The transverse mounting clips onto the side of the device, so it adds width, not depth, inside the enclosure. Plan for that extra DIN-rail space when you're laying out the panel; it's a clean addition but it does eat one slot width per switch. ## Screw Terminal Reality Screw connection means a standard Pozidriv driver and a torque spec you can hit with a common screwdriver — no special crimp tool or cage-plunger required. For the MRO planner restocking a panel spares kit, that's one less specialty tool to keep on the truck. The trade-off is a slightly slower wire termination compared to spring-cage, but in a retrofit or field-repair scenario, screw terminals are dead reliable and easy to re-terminate after a swap.","metaTitle":"Siemens 3RV1901-1FA00-0FJ0 SIRIUS Transverse Aux Switch, 2 N","metaDescription":"Siemens SIRIUS 3RV1901-1FA00-0FJ0 transverse auxiliary switch. 2 NO contacts, screw connection, fits S00-S3. Current lifecycle stage. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Motor Protection Circuit Breakers (MPCB)"],"specifications":{"lifecycle_stage":"current"}},"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=381407&mlfb=3RV1901-1FA00-0FJ0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV1901-1FA00-0FJ0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RV1901-1FA00-0FJ0 and get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Submit a request for quote; availability and current pricing are confirmed at quote time."},{"question":"What is the closest pin-compatible alternative to 3RV1901-1FA00-0FJ0 in this component family?","answer":"Within the SIRIUS family, the transverse auxiliary switches share the same mounting footprint across the S00-S3 range. The primary difference is contact configuration: this one is 2 NO. A 1 NO + 1 NC version (order code 3RV1901-1EA00-0FJ0) or a 2 NC version are the same physical fit, so the choice comes down to the contact arrangement your circuit needs."},{"question":"What is 3RV1901-1FA00-0FJ0's listed lifecycle_stage (current) on this component line?","answer":"The lifecycle stage is listed as current."},{"question":"What is 3RV1901-1FA00-0FJ0's listed description?","answer":"The listed description is: SIRIUS ACCESSORIES TRANSVERSE AUX. SWITCH SIZE S00 - S3 2 NO CONTACTS SCREW CONNECTION."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV1901-1FA00-0FJ0","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/3RV1901-1FA00-0FJ0 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}}