{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV1901-1J","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV1901-1J","canonicalUrl":"https://aoctrl.com/siemens/3RV1901-1J","factsUrl":"https://aoctrl.com/api/mcp/products/3RV1901-1J","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS lateral auxiliary switch, 3RV1901-1J, 2 NO + 2 NC screw-type contacts, 10 A maximum, IP20 finger-safe front, for circuit breaker sizes S00...S3.","salesMarkdown":"The Siemens 3RV1901-1J is a SIRIUS lateral auxiliary switch that clips onto the front of a circuit breaker in sizes S00, S0, S2, or S3 — it adds two normally-open and two normally-closed instantaneous contacts for signaling or interlocking. The screw-type terminals accept 2x (0.5…1.5 mm²) or 2x (0.75…2.5 mm²) solid or ferruled stranded, so the wiring matches standard panel-building practice. The 18 mm width and 68 mm depth keep it inside the breaker envelope; no extra DIN-rail space is needed. The 10 A maximum is the thermal current the contacts can carry continuously in a resistive circuit — but the real-world switching capacity depends on voltage and duty. At 230 V AC-15 (typical for solenoid or contactor coils) it's rated 4 A; at 400 V AC-15 it drops to 3 A. For 24 V DC loads it handles 2 A, and at 110 V DC it's 0.5 A. The IP20 finger-safe front means the contacts are protected against accidental touch from the front, which is the standard for enclosed panel gear — not for open washdown environments. The 3RV1901-1J is a phased-out product. The official Siemens successor is the SIRIUS 3RV2 series, preferred successor type 3RV2901-1J. If you're holding a panel design that references this auxiliary switch, the 3RV2901-1J is the drop-in replacement to evaluate for new builds or last-time-buy coverage.","metaTitle":"Siemens 3RV1901-1J SIRIUS Auxiliary Switch, 2NO+2NC, 10A, IP","metaDescription":"Siemens 3RV1901-1J SIRIUS lateral auxiliary switch, 2NO+2NC contacts, 10A max, IP20. Phased-out; successor 3RV2901-1J. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Motor Protection Circuit Breakers (MPCB)"],"specifications":{"Depth":"68mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Width":"18mm","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, transverse on the front","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)","touch protection on the front acc. to IEC 60529":"finger-safe, for vertical contact from the front","protection class IP on the front acc. to IEC 60529":"IP20","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":"2","number of NO contacts for auxiliary contacts instantaneous contact":"2"}},"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=128618&mlfb=3RV1901-1J","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV1901-1J/alternatives.json"},"ai":{"faq":[{"question":"What replaces 3RV1901-1J?","answer":"The preferred successor is Siemens 3RV2901-1J from the SIRIUS 3RV2 series."},{"question":"Where can I buy 3RV1901-1J?","answer":"This part is sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What are the key ratings of 3RV1901-1J?","answer":"It provides 2 NO + 2 NC screw-type contacts rated 10 A maximum thermal current. At 230 V AC-15 it switches 4 A; at 400 V AC-15 it switches 3 A; at 24 V DC it handles 2 A."},{"question":"Will 3RV1901-1J fit a panel wired for 3RH2131-1AH00?","answer":"No — the 3RV1901-1J is a lateral auxiliary switch that mounts on the front of a circuit breaker (sizes S00…S3), while the 3RH2131-1AH00 is a standalone auxiliary contactor that snaps onto DIN rail. They are not footprint-compatible without rewiring."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV1901-1J","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/3RV1901-1J 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}}