{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1921-2CA10-ZW97","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1921-2CA10-ZW97","canonicalUrl":"https://aoctrl.com/siemens/3RH1921-2CA10-ZW97","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1921-2CA10-ZW97","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, auxiliary switch, 3RH1921-2CA10-ZW97, 1 N/O contact, snap-on front mount for S0 contactors, rated 10 A at 24 V, IP20.","salesMarkdown":"It adds one instantaneous N/O contact for feedback, interlocking, or control logic without taking up extra DIN-rail space — it rides directly on the contactor body. The AC-15 rating at 690 V (1 A) covers solenoid and contactor coil switching in higher-voltage control circuits. This is a mirror contact per IEC 60947-4-1 when paired with a 3RT1 contactor, meaning the N/O contact's position mechanically mirrors the main contact position — critical for safety circuits where you need positive confirmation that the main contacts have opened. Substance prohibitance date of July 1, 2006 aligns with RoHS compliance. Front protection is IP20 — finger-safe but not washdown-rated, so mount it inside an enclosure. Snaps onto the front of S0 contactors — no tools needed, no DIN-rail slot consumed. Wiring accepts 2x (0.5 to 2.5 mm²) solid or stranded, or 2x (20 to 14 AWG). Finely stranded with ferrule: 2x (0.5 to 1.5 mm²). Strip length is standard for the SIRIUS terminal style. Dimensions are compact: 10 mm wide, 38 mm tall, 51 mm deep — it adds negligible footprint to the contactor assembly.","metaTitle":"Siemens 3RH1921-2CA10-ZW97 SIRIUS Auxiliary Switch, 10 A at","metaDescription":"Siemens SIRIUS 3RH1921-2CA10-ZW97 auxiliary switch for S0 contactors. Rated 10 A at 24 V, snap-on front mount, IP20. Current production. Mirror contact per IEC 60947-4-1.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"51 mm","Width":"10 mm","title":"3RH1921-2CA10-ZW97","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","description":"front-side auxiliary switch, 1 NO contact, Spring-type terminal, for contactors 3RT1 Multi-unit packaging = 344 units","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 ... 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 ... 14)","Finely Stranded With Core End Processing":"2x (0.5 ... 1.5 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","Finely Stranded Without Core End Processing":"2x (0.5 ... 2.5 mm²)","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":"spring-loaded 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,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/605a8f78ad378ff08d5e9cee81932ac1.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=421805&mlfb=3RH1921-2CA10-ZW97"},"ai":{"faq":[{"question":"Will 3RH1921-2CA10-ZW97 drop into a panel specified around 3RT2024-2BB40?","answer":"It depends on the contactor frame size. The 3RH1921-2CA10-ZW97 is designed to snap onto S0-size contactors. If 3RT2024-2BB40 is an S0 frame, it will fit mechanically. Verify the contactor frame size before ordering — the auxiliary switch mounts directly on the contactor front, not on DIN rail."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1921-2CA10-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/3RH1921-2CA10-ZW97 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}