{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1981-1DA11","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1981-1DA11","canonicalUrl":"https://aoctrl.com/siemens/3RH1981-1DA11","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1981-1DA11","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary switch, 3RH1981-1DA11, 1 NO + 1 NC, screw-type terminals, for 3RT148 contactors, 65.5 mm depth, 600 V insulation class.","salesMarkdown":"It adds one normally-open and one normally-closed instantaneous contact via screw-type terminals, mounted laterally on the contactor. The 65.5 mm depth and 12.8 mm width keep the assembly within the contactor's footprint — no extra DIN-rail space needed. Rated insulation voltage is 600 V at pollution degree 3, with a surge withstand of 6 kV. The AC-12 maximum operational current is 16 A, and the mirror-contact function per IEC 60947-4-1 is active when paired with the 3RT148 — meaning the NC contact reliably reflects the main contact position in safety circuits. ## Switching capacity and terminal data Contact ratings are given per voltage: 6 A at 24 V, 2 A at 48 V and 60 V, 1 A at 110 V, 0.55 A at 125 V, 0.27 A at 220 V and 250 V, 3 A at 230 V, and 1.5 A at 400 V. These are the make/break limits for the auxiliary contacts — stay within these for reliable switching of pilot devices, relays, or PLC inputs. Screw terminals accept 2x (1 … 2.5 mm²) solid or finely stranded with ferrule, or 2x (16 … 14 AWG). Mechanical service life is 1 000 000 operating cycles typical. Storage temperature range is -40 … +80 °C; operating ambient is -25 … +55 °C.","metaTitle":"Siemens 3RH1981-1DA11 SIRIUS Auxiliary Switch, 1 NO + 1 NC,","metaDescription":"Siemens 3RH1981-1DA11 SIRIUS auxiliary switch for 3RT148 contactors. 1 NO + 1 NC, screw terminals, 65.5 mm depth, 600 V insulation. Available to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"65.5 mm","Solid":"2x (1 ... 2,5 mm²)","Width":"12.8 mm","Height":"72 mm","at 24 V":"6 A","at 48 V":"2 A","at 60 V":"2 A","at 110 V":"1 A","at 125 V":"0.55 A","at 220 V":"0.27 A","at 230 V":"3 A","at 250 V":"0.27 A","at 400 V":"1.5 A","During Storage":"-40 ... +80 °C","Leading Contact":"0","lifecycle_stage":"current","During Operation":"-25 ... +55 °C","Fastening Method":"screw fixing","Product Category":"Auxiliary switch","Lagging Switching":"0","Solid Or Stranded":"2x (1 ... 2.5 mm²)","Product Brand Name":"SIRIUS","Product Designation":"auxiliary switch","Suitability For Use":"for 3RT148","Design Of The Product":"first laterally mountable","Instantaneous Contact":"1","Substance Prohibitance (Date)":"05/15/2019","protection class IP on the front":"IP00","Surge Voltage Resistance Rated Value":"6 kV","for AWG cables for auxiliary contacts":"2x (16 ... 14)","Finely Stranded With Core End Processing":"2x (1 ... 2,5 mm²)","mirror contact according to IEC 60947-4-1":"Yes; with 3RT148","Mechanical Service Life (Operating Cycles) Typical":"1 000 000","operational current of auxiliary contacts at AC-12 maximum":"16 A","Type Of Electrical Connection For Auxiliary And Control Circuit":"screw-type terminals","insulation voltage with degree of pollution 3 at AC rated value":"600 V","number of CO contacts of auxiliary contacts instantaneous contact":"0","AWG number as coded connectable conductor cross section for auxiliary contacts":"16 ... 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=1434933&mlfb=3RH1981-1DA11","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1981-1DA11/alternatives.json"},"ai":{"faq":[{"question":"What compliance documentation does Siemens provide for the 3RH1981-1DA11?","answer":"The part carries a RoHS compliance date of May 15, 2019, and is designed to meet IEC 60947-4-1 mirror-contact requirements when paired with the 3RT148. Standard Siemens declarations of conformity are available."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1981-1DA11","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/3RH1981-1DA11 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}}