{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3UG4583-2CW31","brand":"Siemens","brandSlug":"siemens","productSlug":"3UG4583-2CW31","canonicalUrl":"https://aoctrl.com/siemens/3UG4583-2CW31","factsUrl":"https://aoctrl.com/api/mcp/products/3UG4583-2CW31","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3UG4583-2CW31 insulation monitoring relay, analog setting, 24-240 V AC/DC control supply, 45 mm wide, spring-loaded terminals, IP20.","salesMarkdown":"The Siemens SIRIUS 3UG4583-2CW31 is an insulation monitoring relay with an analog setting scale — it continuously measures the insulation resistance of an ungrounded AC or DC system and trips an output when the value drops below the set threshold. It monitors AC systems from 0 to 400 V and DC systems of the same voltage class, across line frequencies from 15 to 400 Hz. The control supply voltage accepts 24 to 240 V AC/DC. The 45 mm width fits a single slot in most distribution boards. Spring-loaded terminals accept solid wire 20-16 AWG (2x conductors) and stranded 18-16 AWG (2x conductors), or finely stranded with ferrule 0.5-1.5 mm². No screw tightening needed — strip, push, done. Mounting position is any — horizontal, vertical, upside down — the relay doesn't care. ## Setting and response An error memory option (yes) latches the alarm after a fault clears, so the condition isn't lost on a transient recovery. Delayed switching of 2 seconds prevents nuisance tripping on momentary ground faults or switching transients — typical for motor starts or capacitive coupling on long cable runs. ## Environmental and electrical robustness Surge voltage resistance of 4000 V means the relay withstands transient overvoltages common in industrial power systems without failing — important for IT (ungrounded) systems where the first fault doesn't clear and the voltage to ground can rise.","metaTitle":"Siemens 3UG4583-2CW31 SIRIUS Insulation Monitor, 24-240 V AC","metaDescription":"Siemens SIRIUS 3UG4583-2CW31 insulation monitoring relay with analog setting. Monitors AC/DC systems up to 400 V, 15-400 Hz. DIN-rail mount, spring terminals, IP20. Active lifecycl","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Process / Temperature Controllers"],"specifications":{"Depth":"100 mm","Solid":"20 ... 16","Width":"45 mm","Height":"78 mm","Upwards":"0 mm","Forwards":"0 mm","Stranded":"18 ... 16","Backwards":"0 mm","Downwards":"0 mm","At The Side":"0 mm","Error Memory":"Yes","Initial Value":"0.85","For Monitoring":"AC/DC","lifecycle_stage":"current","Fastening Method":"snap-on fastening on 35 mm DIN rail","Full-Scale Value":"1.1","Product Function":"Insulation monitor","Delayed Switching":"2","Mounting Position":"any","Product Brand Name":"SIRIUS","Product Designation":"Insulation monitoring relay with analog setting","at AWG cables solid":"2x (20 ... 16)","protection class IP":"IP20","at 50 Hz rated value":"24 ... 240 V","at 60 Hz rated value":"24 ... 240 V","at AWG cables stranded":"2x (18 ... 16)","measurable voltage at AC":"0 ... 400 V","Measurable Line Frequency":"15 ... 400 Hz","Of The Control Supply Voltage":"AC/DC","Substance Prohibitance (Date)":"05/01/2012","Type Of Electrical Connection":"spring-loaded terminals","Operating Frequency Rated Value":"15 ... 400 Hz","Ambient Temperature During Operation":"-25 ... +60 °C","Surge Voltage Resistance Rated Value":"4 000 V","Of The Operating Voltage For Actuation":"AC/DC","number of NC contacts delayed switching":"0","number of NO contacts delayed switching":"0","reference code according to IEC 81346-2":"K","Finely Stranded With Core End Processing":"0.5 ... 1.5 mm²","control supply voltage at DC rated value":"24 ... 240 V","Finely Stranded Without Core End Processing":"0.5 ... 1.5 mm²","number of NC contacts for auxiliary contacts":"0","number of NO contacts for auxiliary contacts":"0","Adjustable Open/Closed-Circuit Current Principle":"No","Thermal Current Of The Switching Element With Contacts Maximum":"4 A","Product Component Removable Terminal For Auxiliary And Control Circuit":"No"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/3UG4583-2CW31/alternatives.json"},"ai":{"faq":[{"question":"What is the depth of the 3UG4583-2CW31?","answer":"The depth is 100 mm. Combined with a width of 45 mm and height of 78 mm, it fits standard DIN-rail enclosures."},{"question":"What wire sizes does the spring terminal accept?","answer":"Solid wire 20-16 AWG (2x conductors) and stranded 18-16 AWG (2x conductors), or finely stranded with ferrule 0.5-1.5 mm²."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3UG4583-2CW31","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/3UG4583-2CW31 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}}