{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RN1012-2CK00","brand":"Siemens","brandSlug":"siemens","productSlug":"3RN1012-2CK00","canonicalUrl":"https://aoctrl.com/siemens/3RN1012-2CK00","factsUrl":"https://aoctrl.com/api/mcp/products/3RN1012-2CK00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RN1 thermistor motor protection evaluation unit, 3RN1012-2CK00, 230 V AC 50/60 Hz, 1 NO + 1 NC, spring-loaded terminals, IP20, 22.5 mm width.","salesMarkdown":"The Siemens 3RN1012-2CK00 is a thermistor motor protection evaluation unit from the SIRIUS 3RN1 series. It monitors PTC thermistor sensors embedded in motor windings and trips the contactor when the winding temperature exceeds the threshold, protecting against overload or cooling failure. The unit operates on 230 V AC at 50 or 60 Hz and provides one normally-open and one normally-closed auxiliary contact (1 NO + 1 NC) for control and alarm signaling. The 3RN1012-2CK00 is marked as a phased-out product. The preferred successor is the 3RN2012-2BW30, which offers the same thermistor motor protection function with manual/auto/remote selection and the same contact configuration (1 NO + 1 NC) at 230/110 V AC. For new designs or line-down replacements, the 3RN2012-2BW30 is the direct drop-in replacement. Rated for 230 V AC at both 50 and 60 Hz, this unit is a straight swap in panels using standard European line voltage. The 1 NO + 1 NC contact arrangement covers the basic motor protection scheme: the NO contact drops the contactor coil on over-temperature, and the NC contact signals the fault to a PLC or alarm lamp. The 22.5 mm width matches the standard single-module DIN-rail footprint, so it fits into any 35 mm rail panel without crowding adjacent devices. Screw and snap-on mounting lets you either fasten it with a screw or clip it directly onto the rail — handy when retrofitting into an existing panel where the rail is already populated.","metaTitle":"Siemens 3RN1012-2CK00 Thermistor Motor Protection, 230 V AC","metaDescription":"Siemens 3RN1012-2CK00 thermistor motor protection evaluation unit. 230 V AC, 1 NO + 1 NC, spring terminals, IP20. Phased out; successor 3RN2012-2BW30. Source to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Process / Temperature Controllers"],"specifications":{"Depth":"91 mm","Width":"22.5 mm","Height":"103 mm","Type Of Voltage":"AC","lifecycle_stage":"current","Fastening Method":"screw and snap-on mounting","display version LED":"Yes","protection class IP":"IP20","at 50 Hz rated value":"230 V","at 60 Hz rated value":"230 V","Substance Prohibitance (Date)":"07/01/2006","Product Function Reclosing Lockout":"Yes","Ambient Temperature During Operation":"-25 ... +60 °C","reference code according to IEC 81346-2":"K","number of CO contacts for auxiliary contacts":"0","number of NC contacts for auxiliary contacts":"1","number of NO contacts for auxiliary contacts":"1","1 For Auxiliary And Control Circuit Rated Value":"50 Hz","2 For Auxiliary And Control Circuit Rated Value":"60 Hz","Type Of Electrical Connection For Auxiliary And Control Circuit":"spring-loaded terminals"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/3RN1012-2CK00/alternatives.json"},"ai":{"faq":[{"question":"What replaces the 3RN1012-2CK00?","answer":"The official replacement is the 3RN2012-2BW30. It offers the same contact configuration and voltage range, with added manual/auto/remote mode selection."},{"question":"What are the key ratings of the 3RN1012-2CK00?","answer":"It operates on 230 V AC at 50/60 Hz, has 1 NO + 1 NC auxiliary contacts, spring-loaded terminals, IP20 protection, and a 22.5 mm width for DIN-rail mounting. Ambient temperature range is -25 to +60 °C."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RN1012-2CK00","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/3RN1012-2CK00 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}}