{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV1921-1M","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV1921-1M","canonicalUrl":"https://aoctrl.com/siemens/3RV1921-1M","factsUrl":"https://aoctrl.com/api/mcp/products/3RV1921-1M","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS signaling switch 3RV1921-1M, separate tripped signal and short circuit alarm, 1 NO + 1 NC, 10A max, 68mm depth, for circuit breaker sizes S0, S2, S3.","salesMarkdown":"The Siemens 3RV1921-1M is a SIRIUS signaling switch designed for circuit breaker sizes S0, S2, and S3. ## Contact ratings The auxiliary contacts are rated for 10 A maximum, with voltage-specific switching capacities: 2 A at 24 V, 0.5 A at 110 V, 0.25 A at 220 V, 4 A at 230 V, 3 A at 400 V, and 10 A at 690 V. At AC-15 duty at 690 V the rated operational current is 1 A. These numbers define the signal load it can break — useful for sizing the downstream input card or relay coil. Mounts via plug-in fixing directly onto the front of the circuit breaker — no DIN rail footprint required. The screw-type terminals accept 2x (0.5 to 1.5 mm²) and 2x (0.75 to 2.5 mm²) solid or finely stranded wire with core end processing. Overall dimensions are 18 mm wide, 90 mm tall, and 68 mm deep, so it stays within the breaker's own envelope.","metaTitle":"Siemens 3RV1921-1M SIRIUS Signaling Switch, 10A, 68mm Depth","metaDescription":"Siemens 3RV1921-1M SIRIUS signaling switch for circuit breaker sizes S0-S3. 1 NO + 1 NC contacts, 10A max, 68mm depth. Phased-out; successor 3RV2921-1M available. Sourced to order","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":"signaling switch","Design Of The Product":"separate tripped signal and short circuit alarm, 1 NO + 1 NC each","With Core End Processing":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Size Of The Circuit-Breaker":"S0, S2, S3","at AC-15 at 690 V rated value":"1A","at AWG cables for auxiliary contacts":"2x (18 ... 14)","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,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=134311&mlfb=3RV1921-1M","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV1921-1M/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3RV1921-1M?","answer":"The 3RV1921-1M is sourced to order against an RFQ through independent distribution. Submit a request for quote (RFQ) to confirm current pricing and availability at the time of order."},{"question":"What is the 3RV1921-1M depth?","answer":"The 3RV1921-1M has a depth of 68 mm, with a width of 18 mm and height of 90 mm."},{"question":"What wire sizes does the 3RV1921-1M accept?","answer":"The screw-type terminals accept 2x (0.5 to 1.5 mm²) and 2x (0.75 to 2.5 mm²) solid or finely stranded wire with core end processing."},{"question":"What compliance documentation is available for 3RV1921-1M?","answer":"As a Siemens SIRIUS component, the 3RV1921-1M carries the standard CE marking for the European market. RoHS and REACH compliance documentation is typically available through the manufacturer's product support portal. Specific UL or IEC certification details are not listed in the available specifications for this specific order code."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV1921-1M","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/3RV1921-1M 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}}