{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1981-1JA11","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1981-1JA11","canonicalUrl":"https://aoctrl.com/siemens/3RH1981-1JA11","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1981-1JA11","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary switch, 3RH1981-1JA11, 1 NO + 1 NC, screw-type terminals, lateral mount for 3RT148 contactors, 6 A at 24 V, mirror contact per IEC 60947-4-1.","salesMarkdown":"It uses screw-type terminals and is rated for 6 A at 24 V, 3 A at 230 V, and 1.5 A at 400 V, with a maximum AC-12 current of 16 A. The mirror contact function per IEC 60947-4-1 means the NC contact reliably reflects the main contact position — critical for safety circuits where you need positive feedback that the power contacts have opened. This auxiliary switch is a lateral add-on, not a front-mount block. It clips onto the side of a 3RT148 contactor, occupying 12.8 mm of additional panel width. The screw terminals accept 2x (1 to 2.5 mm²) solid or stranded wire, or 2x (16 to 14) AWG. Depth is 65.5 mm, height 72 mm. Fastening is by screw fixing to the contactor. The IP00 front protection means it's intended for enclosed panels only — no washdown exposure. ## Contact ratings and switching capacity The switching capacity varies significantly with voltage. At 24 V the contacts handle 6 A; at 48 V and 60 V it drops to 2 A; at 110 V it's 1 A; at 230 V it's 3 A; at 400 V it's 1.5 A. The AC-12 rating of 16 A is the maximum thermal current for resistive loads. The surge voltage resistance is 6 kV, and the insulation voltage at pollution degree 3 is 600 V AC. Mechanical life is rated at 1 million operating cycles typical.","metaTitle":"3RH1981-1JA11 SIRIUS Auxiliary Switch, 1 NO 1 NC, Screw Term","metaDescription":"Siemens SIRIUS 3RH1981-1JA11 auxiliary switch for 3RT148 contactors. 1 NO + 1 NC, screw terminals, 6 A at 24 V, mirror contact per IEC 60947-4-1. Lateral mount. Current production.","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":"second can be mounted laterally","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":"https://cdn.aoctrl.com/46d32935801becaf060126a210ba915e.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1434934&mlfb=3RH1981-1JA11","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1981-1JA11/alternatives.json"},"ai":{"faq":[{"question":"What contactor does this auxiliary switch fit?","answer":"It is designed specifically for the Siemens 3RT148 contactor, mounting laterally on the side."},{"question":"What are the contact ratings at common control voltages?","answer":"At 24 V it switches 6 A; at 48 V and 60 V it switches 2 A; at 110 V it switches 1 A; at 230 V it switches 3 A; at 400 V it switches 1.5 A."},{"question":"Does this block have a mirror contact?","answer":"Yes, the normally-closed contact is a mirror contact per IEC 60947-4-1 when used with the 3RT148 contactor, providing positive feedback of the main contact position."},{"question":"Where can I buy the 3RH1981-1JA11 and get current pricing?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1981-1JA11","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/3RH1981-1JA11 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}}