{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1921-1CA01-ZW97","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1921-1CA01-ZW97","canonicalUrl":"https://aoctrl.com/siemens/3RH1921-1CA01-ZW97","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1921-1CA01-ZW97","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS front-side auxiliary switch, 1 NC contact, screw-type terminals, for 3RT1 contactors, 10 A rated, snap-on mounting, IP20 front.","salesMarkdown":"The Siemens SIRIUS 3RH1921-1CA01-ZW97 is a front-side auxiliary switch block that adds one normally-closed (NC) contact to a 3RT1 contactor or contactor relay. It snaps onto the front of the contactor without extra tools or wiring changes — the contactor's own actuating mechanism drives the auxiliary contact. Rated at 10 A maximum (10 A at 24 V rated value, 6 A at 230 V, 3 A at 400 V), it handles typical control-circuit loads like PLC inputs, relay coils, and indicator lamps. The mechanical service life of 10 million switching cycles means this block outlasts most contactors it rides on. Snap-on mounting onto the contactor front — no DIN rail needed for the switch itself. The block is 10 mm wide, 38 mm high, and 51 mm deep, so it adds negligible width to the contactor stack. Screw-type terminals accept 2x (0.5...1.5 mm²) or 2x (0.75...2.5 mm²) with core-end processing, or AWG 20–16 and 18–14. IP20 on the front face is standard for enclosed panels; keep the cabinet door closed for washdown areas.","metaTitle":"Siemens 3RH1921-1CA01-ZW97 SIRIUS Auxiliary Switch, 1 NC, 10","metaDescription":"Siemens SIRIUS 3RH1921-1CA01-ZW97 front-side auxiliary switch, 1 NC contact, screw terminals, for 3RT1 contactors. Rated 10 A, snap-on mount. Current production. Available to order","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Note":"with 3RT1","Depth":"51 mm","Width":"10 mm","Height":"38 mm","Maximum":"10 A","at 24 V":"6 A","at 60 V":"2 A","at 110 V":"1 A","at 125 V":"6 A","at 220 V":"0.3 A","at 230 V":"6 A","at 250 V":"6 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 Brand Name":"SIRIUS","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","Instantaneous Contact":"0","With Core End Processing":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","at AC-15 at 690 V rated value":"1 A","protection class IP on the front":"IP20","Surge Voltage Resistance Rated Value":"6 kV","at AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14)","Contact Reliability Of Auxiliary Contacts":"1 faulty switching per 100 million (17 V, 1 mA)","Mechanical Service Life (Switching Cycles) Typical":"10 000 000","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"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/b1f259f4647e8fa5f48ab272bd0c1d60.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=347065&mlfb=3RH1921-1CA01-ZW97","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1921-1CA01-ZW97/alternatives.json"},"ai":{"faq":[{"question":"What is 3RH1921-1CA01-ZW97 used for?","answer":"It is a front-side auxiliary switch that adds one NC contact to a 3RT1 contactor or contactor relay. Use it for status feedback, interlocking, or control-circuit switching up to 10 A."},{"question":"How do I get current pricing and availability for 3RH1921-1CA01-ZW97?","answer":"Submit an RFQ through this listing. Pricing and stock are confirmed at quote time through our independent distribution channels."},{"question":"Will 3RH1921-1CA01-ZW97 fit a contactor other than 3RT1?","answer":"No. The mounting interface is specific to the 3RT1 contactor family. It will not snap onto other SIRIUS sizes or third-party contactors without mechanical modification."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1921-1CA01-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/3RH1921-1CA01-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}}