{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RN1012-2BB00","brand":"Siemens","brandSlug":"siemens","productSlug":"3RN1012-2BB00","canonicalUrl":"https://aoctrl.com/siemens/3RN1012-2BB00","factsUrl":"https://aoctrl.com/api/mcp/products/3RN1012-2BB00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RN1 thermistor motor protection evaluation unit, order code 3RN1012-2BB00, 24 V AC/DC control supply, 2 CO relay outputs, spring-loaded terminals, IP20, 22.5 mm wide.","salesMarkdown":"The Siemens 3RN1012-2BB00 is a thermistor motor protection evaluation unit from the SIRIUS 3RN1 series, designed to monitor motor winding temperature via PTC thermistor sensors and trip the control circuit on over-temperature. It runs on a 24 V AC/DC control supply and provides two changeover (CO) contacts for alarm and trip signaling. Control supply is 24 V AC/DC, so it drops into panels with a standard 24 VDC power supply or a 24 VAC control transformer without needing a separate rectifier. The two CO contacts are rated for general-purpose auxiliary switching; there are no dedicated NC or NO contacts, meaning both outputs are form-C and can be wired for trip and pre-alarm independently. The LED display gives a quick visual on trip status, useful for troubleshooting without a meter. Width is 22.5 mm, the standard single-module DIN-rail footprint, so it occupies one slot on a TS35 rail. Fastening method is screw and snap-on mounting — the screw provides a positive lock in high-vibration panels, while snap-on is faster for standard cabinets. Depth of 91 mm and height of 103 mm fit most standard enclosures. The unit includes a reclosing lockout function, which prevents automatic restart after a trip until the lockout is manually reset — important for applications where an unexpected restart could be hazardous.","metaTitle":"Siemens 3RN1012-2BB00 Thermistor Motor Protection, 24 V AC/D","metaDescription":"Siemens 3RN1012-2BB00 thermistor motor protection evaluation unit, 24 V AC/DC, 2 CO contacts, IP20, spring terminals. Phased out; successor 3RN2012-2BA30. Sourced 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/DC","lifecycle_stage":"current","Fastening Method":"screw and snap-on mounting","at DC rated value":"24 V","display version LED":"Yes","protection class IP":"IP20","at 50 Hz rated value":"24 V","at 60 Hz rated value":"24 V","Substance Prohibitance (Date)":"05/28/2009","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":"2","number of NC contacts for auxiliary contacts":"0","number of NO contacts for auxiliary contacts":"0","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/3RN1012-2BB00/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings of the 3RN1012-2BB00?","answer":"Control supply 24 V AC/DC, 2 CO relay outputs, spring-loaded terminals, IP20, ambient temperature -25 to +60 °C, width 22.5 mm, depth 91 mm, height 103 mm."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RN1012-2BB00","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/3RN1012-2BB00 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}}