{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV2901-2C","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV2901-2C","canonicalUrl":"https://aoctrl.com/siemens/3RV2901-2C","factsUrl":"https://aoctrl.com/api/mcp/products/3RV2901-2C","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS lateral auxiliary switch, 2 NC, spring-loaded terminals, for 3RV2 circuit breakers sizes S00, S0, S2, S3.","salesMarkdown":"The Siemens 3RV2901-2C is a SIRIUS lateral auxiliary switch designed to snap onto the side of 3RV2 circuit breakers in sizes S00, S0, S2, and S3. It provides two normally-closed (NC) instantaneous contacts via spring-loaded terminals — no screw torque to verify, no vibration loosening over time. The 9.5 mm width and 68 mm depth keep the assembly within the breaker's own envelope, so the DIN-rail footprint doesn't grow. The auxiliary contacts carry a maximum AC-12 rating of 10 A — that's the resistive-load limit for signaling or pilot-duty circuits. For inductive loads typical of contactor coils or relay solenoids (AC-15 duty), the rating drops to 1 A at 690 V. Per the datasheet, the switch handles 3 A at 400 V and 10 A at 690 V, but those figures apply under specific utilization categories; the AC-15 number is the one to size against when switching magnetic loads. At 24 V the contact rating is 2 A, at 110 V it's 0.5 A, and at 230 V it's 4 A — so the same switch covers both control-voltage levels common in North American and European panels. Spring-loaded terminals accept solid or stranded conductors from 0.5 to 2.5 mm² (2x 0.5...2.5 mm² per clamp), or 2x 20–14 AWG. No screwdriver calibration needed — strip to 8–10 mm, push the spring, insert, release. The plug-in fixing method means the switch clips onto the breaker side without tools; removal requires a small flat-blade to release the latch.","metaTitle":"Siemens 3RV2901-2C SIRIUS Auxiliary Switch, 2 NC, Spring Ter","metaDescription":"Siemens 3RV2901-2C SIRIUS lateral auxiliary switch with 2 NC contacts, spring-loaded terminals. Rated 10 A AC-12, 1 A AC-15 at 690 V. Active production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Motor Protection Circuit Breakers (MPCB)"],"specifications":{"Depth":"68 mm","Solid":"2x (0.5 ... 2.5 mm²)","Width":"9.5 mm","Height":"90 mm","at 24 V":"2 A","at 110 V":"0.5 A","at 220 V":"0.25 A","at 230 V":"4 A","at 250 V":"0.25 A","at 400 V":"3 A","at 690 V":"10 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, lateral","Design Of The Product":"lateral auxiliary switches","Size Of The Circuit-Breaker":"S00, S0, S2, S3","Substance Prohibitance (Date)":"10/01/2009","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 at AC-15 at 690 V rated value":"1 A","operational current of auxiliary contacts at AC-12 maximum":"10 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":"2","number of NO contacts for auxiliary contacts instantaneous contact":"0","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=410776&mlfb=3RV2901-2C","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV2901-2C/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RV2901-2C and what is the lead time?","answer":"The 3RV2901-2C is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm lead-time commitment."},{"question":"What is the closest functional second-source to 3RV2901-2C?","answer":"The 3RV2011-0BA20 is a motor-protective circuit breaker from the same SIRIUS family, but it is a different class of device — a 3-pole breaker with thermal and magnetic trips, not a lateral auxiliary switch. It cannot substitute for the 3RV2901-2C's function of adding NC auxiliary contacts to an existing 3RV2 breaker. No direct second-source exists for this lateral switch form factor."},{"question":"What is the 3RV2901-2C depth?","answer":"The depth is 68 mm, matching the standard envelope of the 3RV2 breaker it mounts to. Width is 9.5 mm; height is 90 mm."},{"question":"What compliance documentation does Siemens provide for 3RV2901-2C?","answer":"The part carries a substance prohibition date of October 1, 2009, indicating RoHS compliance (Directive 2011/65/EU). The SIRIUS series typically provides CE, UL, CSA, and IEC 60947 certifications; specific declaration files are available per order."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV2901-2C","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/3RV2901-2C 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}}