{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV2901-1E-ZX90","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV2901-1E-ZX90","canonicalUrl":"https://aoctrl.com/siemens/3RV2901-1E-ZX90","factsUrl":"https://aoctrl.com/api/mcp/products/3RV2901-1E-ZX90","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, transverse auxiliary switch, 3RV2901-1E-ZX90, 1 NO + 1 NC, screw-type terminals, rated 2.5 A maximum, IP20 finger-safe front, plug-in fixing for 3RV2 breakers sizes S00/S0/S2/S3.","salesMarkdown":"## What this auxiliary switch does on a 3RV2 breaker It plugs into the front of the breaker — no tools, no wiring to the main circuit — and signals the breaker's tripped or closed state back to a PLC or control relay. Rated for a maximum of 2.5 A, the switch carries 1 A at 24 V, 0.5 A at 230 V, and derates to 0.15 A at 60 V. That covers most 24 VDC PLC inputs and 230 VAC control circuits, but watch the 60 V curve if you're running a DC control bus at that level — the 0.15 A limit is the binding constraint. The screw-type terminals accept 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) solid or stranded wire, with the same range for ferruled ends. The IP20 finger-safe front means it meets touch-protection requirements per IEC 60529 for vertical contact from the front — standard for a control-panel environment where operators may reach in. This auxiliary switch is designed for the 3RV2 family of circuit breakers in frame sizes S00, S0, S2, and S3. It snaps onto the front of the breaker via plug-in fixing — no DIN-rail space consumed beyond the breaker's own 45 mm width. The transverse orientation means the switch sits across the front face, not on the side, so it doesn't increase the breaker's side-by-side mounting footprint. The 3RV2901-1E-ZX90 ships in multi-unit packaging of 500 pieces, which is a volume pack for panel builders or OEMs running a standard BOM line. For a single-unit replacement, you'd order the standard packaging variant — this ZX90 suffix signals the bulk pack.","metaTitle":"Siemens 3RV2901-1E-ZX90 SIRIUS Auxiliary Switch, 1NO+1NC, 2.","metaDescription":"Siemens SIRIUS 3RV2901-1E-ZX90 transverse auxiliary switch, 1NO+1NC, rated 2.5A max, screw terminals, IP20 front. Active production, sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Motor Protection Circuit Breakers (MPCB)"],"specifications":{"Depth":"17mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Width":"45mm","title":"3RV2901-1E-ZX90","Height":"12mm","Maximum":"2.5A","at 24 V":"1A","at 48 V":"0.3A","at 60 V":"0.15A","at 230 V":"0.5A","description":"Auxiliary switch transverse 1 NO+1 NC screw terminal for circuit breaker 3RV2 Multi-unit packaging 500 units","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":"transverse 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 AWG cables for auxiliary contacts":"2x (20 ... 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":"1","number of NO contacts for auxiliary contacts instantaneous contact":"1"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/2e8f714a8423a2c57f95baddc5095a30.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=26811&mlfb=3RV2901-1E-ZX90"},"ai":{"faq":[{"question":"What is the switching capacity of this auxiliary switch at different voltages?","answer":"The maximum rated current is 2.5 A. At 24 V it switches 1 A, at 48 V it switches 0.3 A, at 60 V it switches 0.15 A, and at 230 V it switches 0.5 A. The 60 V DC rating is the most restrictive — plan your control circuit around that limit if you're using a 60 VDC bus."},{"question":"Will the 3RV2901-1E-ZX90 fit a 3RT6023-1AB00 contactor?","answer":"No — this auxiliary switch is designed for the 3RV2 circuit breaker family (sizes S00, S0, S2, S3), not for 3RT contactors. The 3RT6023-1AB00 uses a different auxiliary switch block that mounts on the contactor's side or top. The two parts share the same SIRIUS brand and similar terminal wire ranges, but they are not mechanically interchangeable."},{"question":"Where can I buy the 3RV2901-1E-ZX90?","answer":"This part is sourced and quoted to order against an RFQ through independent industrial-automation distribution. Availability and current pricing are confirmed at quote time — the multi-unit packaging (500 pieces) typically suits volume BOM commitments rather than single-unit spares."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV2901-1E-ZX90","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/3RV2901-1E-ZX90 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}