{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1921-1CA10-ZW97","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1921-1CA10-ZW97","canonicalUrl":"https://aoctrl.com/siemens/3RH1921-1CA10-ZW97","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1921-1CA10-ZW97","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, auxiliary switch, 3RH1921-1CA10-ZW97, 1 NO contact, snap-on mounting for S0 contactor relays and power contactors, 10 A at 24 V, IP20 front.","salesMarkdown":"The Siemens SIRIUS 3RH1921-1CA10-ZW97 is a snap-on auxiliary switch designed for S0-size contactor relays and power contactors. It carries one normally-open instantaneous contact rated 10 A at 24 V, with additional AC-15 ratings up to 1 A at 690 V and AC-12 maximum 10 A. The contact is a mirror contact per IEC 60947-4-1 when used with 3RT1 contactors, providing a mechanically linked confirmation of the main contact position for safety circuits. Snaps onto the front of S0 contactors via the fastening method — no tools needed for installation. Dimensions are 10 mm wide, 38 mm high, 51 mm deep, fitting within the standard S0 footprint. Rated operational currents span multiple voltages: 6 A at 24 V and 230 V, 2 A at 48 V and 60 V, 1 A at 110 V, 0.9 A at 125 V, 0.3 A at 220 V and 250 V, and 3 A at 400 V. The AC-15 rating at 690 V is 1 A, covering inductive loads typical of contactor coils and solenoid valves. AC-12 maximum is 10 A for resistive loads. Listed as current production. RoHS compliance date is 07/01/2006. Wire connection accepts 2x (0.5 to 1.5 mm²) solid/stranded or 2x (0.75 to 2.5 mm²) finely stranded with ferrule, plus AWG equivalents 20–16 and 18–14.","metaTitle":"Siemens 3RH1921-1CA10-ZW97 SIRIUS Auxiliary Switch, 1 NO, 10","metaDescription":"Siemens SIRIUS auxiliary switch 3RH1921-1CA10-ZW97, 1 NO contact, rated 10 A at 24 V, snap-on mount for S0 contactors. Current production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"51 mm","Width":"10 mm","Height":"38 mm","at 24 V":"6 A","at 48 V":"2 A","at 60 V":"2 A","at 110 V":"1 A","at 125 V":"0.9 A","at 220 V":"0.3 A","at 230 V":"6 A","at 250 V":"0.3 A","at 400 V":"3 A","During Storage":"-55 ... +80 °C","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"snap-on mounting","Product Category":"Auxiliary switch","Size Of Contactor":"S0","Solid Or Stranded":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Product Brand Name":"SIRIUS","Product Designation":"auxiliary switch","Suitability For Use":"Contactor relay and power contactor","at 24 V rated value":"10 A","at 60 V rated value":"4.7 A","at 110 V rated value":"3 A","at 220 V rated value":"1.2 A","at 440 V rated value":"0.5 A","at 600 V rated value":"0.26 A","Design Of The Product":"for snapping onto the front","Instantaneous Contact":"1","Substance Prohibitance (Date)":"07/01/2006","protection class IP on the front":"IP20","Surge Voltage Resistance Rated Value":"6 kV","for AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14)","Finely Stranded With Core End Processing":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Contact Reliability Of Auxiliary Contacts":"1 faulty switching per 100 million (17 V, 1 mA)","mirror contact according to IEC 60947-4-1":"Yes; with 3RT1","operational current at AC-15 at 690 V rated value":"1 A","Mechanical Service Life (Operating Cycles) Typical":"10 000 000","operational current of auxiliary contacts at AC-12 maximum":"10 A","Type Of Electrical Connection For Auxiliary And Control Circuit":"screw-type terminals","insulation voltage with degree of pollution 3 at AC rated value":"690 V","number of CO contacts of 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=72944&mlfb=3RH1921-1CA10-ZW97","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1921-1CA10-ZW97/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source for 3RH1921-1CA10-ZW97?","answer":"The 3RH2122-1BA40 is a similar SIRIUS auxiliary switch block but carries two normally-open contacts and a different contact rating profile. The 3RH1921-1CA10-ZW97 has a single NO contact and a mirror-contact feature per IEC 60947-4-1, which the 3RH2122 series does not guarantee. For a drop-in replacement without rewiring, verify the contact configuration and mirror-contact requirement first."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1921-1CA10-ZW97","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/3RH1921-1CA10-ZW97 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}}