{"product_id":"siemens-sirius-3ug458-insulation-monitoring-relays","title":"Siemens SIRIUS 3UG458 Insulation Monitoring Relays (IT Networks)","description":"\u003cp class=\"ps-intro\"\u003eSIRIUS 3UG458 insulation monitors measure insulation resistance between ungrounded AC\/DC networks and the protective conductor.\u003c\/p\u003e\u003ch4 class=\"ps-h\"\u003eKey features\u003c\/h4\u003e\u003cul class=\"ps-feat\"\u003e\n\u003cli\u003eFor ungrounded (IT) AC networks and AC\/DC networks\u003c\/li\u003e\n\u003cli\u003eAdjustable response value 1-100 kOhm (3UG4583: 2 thresholds up to 200 kOhm)\u003c\/li\u003e\n\u003cli\u003eSystem leakage capacitance up to 10 uF \/ 20 uF\u003c\/li\u003e\n\u003cli\u003eControl supply voltage 24-240 V AC\/DC\u003c\/li\u003e\n\u003cli\u003e3UG4983 voltage reducer extends 3UG4583 to 690 V AC \/ 1000 V DC\u003c\/li\u003e\n\u003cli\u003eScrew or spring-loaded (push-in) terminals\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4 class=\"ps-h\"\u003eSpecifications\u003c\/h4\u003e\u003ctable class=\"ps-kv\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eSiemens\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eProduct line\u003c\/th\u003e\n\u003ctd\u003eSIRIUS 3UG45\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFunction\u003c\/th\u003e\n\u003ctd\u003eInsulation monitoring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSupply\u003c\/th\u003e\n\u003ctd\u003e24 ... 240 V AC\/DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMounting\u003c\/th\u003e\n\u003ctd\u003eDIN rail, stand-alone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSource\u003c\/th\u003e\n\u003ctd\u003eSiemens Catalog IC 10 · 2026, p. 1005\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ctable class=\"ps-src\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e3UG4581-1AW31\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eType: 3UG4581 insulation monitor | Network: 0-400 V AC | Response: 1 ... 100 kOhm | Contacts: 1 CO | Connection: Screw\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3UG4581-2AW31\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eType: 3UG4581 insulation monitor | Network: 0-400 V AC | Response: 1 ... 100 kOhm | Contacts: 1 CO | Connection: Spring-loaded (push-in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3UG4582-1AW31\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eType: 3UG4582 insulation monitor | Network: 0-250 V AC \/ 0-300 V DC | Response: 1 ... 100 kOhm | Contacts: 1 CO | Connection: Screw\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3UG4582-2AW31\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eType: 3UG4582 insulation monitor | Network: 0-250 V AC \/ 0-300 V DC | Response: 1 ... 100 kOhm | Contacts: 1 CO | Connection: Spring-loaded (push-in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3UG4583-1CW31\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eType: 3UG4583 insulation monitor | Network: 0-400 V AC \/ 0-600 V DC | Response: 1-100 \/ 2-200 kOhm | Contacts: 2 CO | Connection: Screw\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3UG4583-2CW31\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eType: 3UG4583 insulation monitor | Network: 0-400 V AC \/ 0-600 V DC | Response: 1-100 \/ 2-200 kOhm | Contacts: 2 CO | Connection: Spring-loaded (push-in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3UG4983-1AA01\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eType: Voltage reducer module (3UG4583) | Network: 0-690 V AC \/ 0-1000 V DC | Response: - | Contacts: - | Connection: Screw\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3UG4983-2AA01\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eType: Voltage reducer module (3UG4583) | Network: 0-690 V AC \/ 0-1000 V DC | Response: - | Contacts: - | Connection: Spring-loaded (push-in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":67535296037154,"sku":"3UG4581-1AW31","price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1021\/0744\/7586\/files\/siemens-sirius-3ug458-insulation-monitoring-relays.jpg?v=1792150171","url":"https:\/\/prosourcemro.com\/products\/siemens-sirius-3ug458-insulation-monitoring-relays","provider":"ProSource MRO","version":"1.0","type":"link"}