{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV2901-2E-ZX90","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV2901-2E-ZX90","canonicalUrl":"https://aoctrl.com/siemens/3RV2901-2E-ZX90","factsUrl":"https://aoctrl.com/api/mcp/products/3RV2901-2E-ZX90","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary switch, transverse on the front, 1 NO + 1 NC, spring-loaded terminals, for 3RV2 circuit breakers, depth 17 mm, width 45 mm, multi-unit packaging of 500 units.","salesMarkdown":"## Siemens SIRIUS 3RV2901-2E-ZX90 — transverse auxiliary switch for 3RV2 breakers The Siemens SIRIUS 3RV2901-2E-ZX90 is a transverse front-mounted auxiliary switch designed for the 3RV2 series of circuit breakers (sizes S00, S0, S2, S3). It provides 1 normally open (NO) and 1 normally closed (NC) instantaneous contact, wired through spring-loaded terminals that accept 2x (0.5... 2.5 mm²) solid or stranded conductors, or 2x (20... 14) AWG for auxiliary contacts. Rated at 1 A at 24 V, 0.5 A at 230 V, and 0.3 A at 48 V, with an AC-12 maximum operational current of 2.5 A, this switch handles the typical control-circuit loads found in motor starter and distribution panels — signaling contactor status, driving PLC inputs, or interlocking safety circuits. The 17 mm depth and 45 mm width keep the assembly compact inside a DIN-rail enclosure. ## Fit and integration — spring-clamp wiring on a 45 mm footprint Mounts via plug-in fixing directly onto the front of a 3RV2 circuit breaker. The spring-loaded terminals accept 0.5 to 2.5 mm² solid or stranded, or 0.5 to 1.5 mm² finely stranded with or without ferrule. Because this is a transverse auxiliary switch, it sits on the front face of the breaker rather than stacking on the side. That means the overall depth stays at 17 mm — useful when panel depth is tight. The 1 NO + 1 NC contact arrangement covers the common feedback pair: one contact for the run signal (NO) and one for the fault/trip signal (NC). ## Lifecycle and sourcing — active production, multi-unit packaging The part is a transverse auxiliary switch in the SIRIUS family. No end-of-life notice is on record. ## Compliance and environmental data The product carries a substance prohibitance date of 05/28/2009, indicating RoHS compliance for the EU directive. The spring-loaded terminal design supports quick field wiring changes without special tools.","metaTitle":"Siemens 3RV2901-2E-ZX90 SIRIUS Auxiliary Switch, 1 NO+1 NC,","metaDescription":"Siemens SIRIUS 3RV2901-2E-ZX90 auxiliary switch, transverse front mount, 1 NO+1 NC contacts, spring-loaded terminals. Active product, sourced to order. Depth 17 mm, width 45 mm. Re","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Motor Protection Circuit Breakers (MPCB)"],"specifications":{"Depth":"17 mm","Solid":"2x (0.5 ... 2.5 mm²)","Width":"45 mm","Height":"13 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","Design Of The Product":"transverse auxiliary switches","Size Of The Circuit-Breaker":"S00, S0, S2, S3","Substance Prohibitance (Date)":"05/28/2009","for AWG cables for auxiliary contacts":"2x (20 ... 14)","Finely Stranded With Core End Processing":"2x (0.5 ... 1.5 mm²)","Finely Stranded Without Core End Processing":"2x (0.5 ... 1.5 mm²)","operational current of auxiliary contacts at AC-12 maximum":"2.5 A","Type Of Electrical Connection For Auxiliary And Control Circuit":"spring-loaded 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","AWG number as coded connectable conductor cross section for auxiliary contacts":"20 ... 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=478714&mlfb=3RV2901-2E-ZX90","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV2901-2E-ZX90/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source for 3RV2901-2E-ZX90?","answer":"The 3RT6023-1AB00 is a SIRIUS power contactor with a similar 1 NO + 1 NC auxiliary contact block, but it is a contactor, not a breaker-mounted switch. The 3RV2901-2E-ZX90 is specifically designed to plug into a 3RV2 circuit breaker; a contactor auxiliary block will not fit that mounting interface without rewiring the panel. If you need a direct drop-in replacement for a 3RV2 breaker, stick with the 3RV2901-2E-ZX90."},{"question":"What is the depth of 3RV2901-2E-ZX90?","answer":"The depth is 17 mm, measured from the breaker face to the back of the switch body. Width is 45 mm, height is 13 mm."},{"question":"What wire sizes does the spring-loaded terminal accept?","answer":"It accepts 2x (0.5... 2.5 mm²) solid or stranded conductors, or 2x (20... 14) AWG. For finely stranded wire with or without ferrule, the range is 2x (0.5... 1.5 mm²)."},{"question":"What compliance documentation is available for 3RV2901-2E-ZX90?","answer":"The part meets RoHS requirements with a substance prohibitance date of 05/28/2009. Siemens typically provides CE, UL, and CSA certifications for the SIRIUS family; specific declarations are available on request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV2901-2E-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/3RV2901-2E-ZX90 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}}