{"product_id":"siemens-thermistor-motor-protection-relay-screw-2-c-o-24vac-dc","title":"Siemens Thermistor motor protection relay, screw, 2 c\/o, 24VAC\/DC","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe Siemens 3RN2011-1BA30 is a thermistor motor protection relay from the SIRIUS 3RN2 series. It monitors motor temperature via PTC thermistor sensors and trips reliably when overheating is detected, protecting motors against thermal overload as well as open or short circuit in the sensor circuit. Compact at 22.5 mm width, it is suitable for control panels requiring safe temperature-based protection.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThermistor protection relay for motor temperature monitoring\u003c\/li\u003e\n\u003cli\u003eEvaluates PTC thermistor sensor signals directly\u003c\/li\u003e\n\u003cli\u003eCompact 22.5 mm housing — space-efficient panel installation\u003c\/li\u003e\n\u003cli\u003e2 change-over relay contacts (DPDT) for switching and signalling\u003c\/li\u003e\n\u003cli\u003eStatus indication LEDs for READY \/ TRIP\u003c\/li\u003e\n\u003cli\u003eManual or remote reset after trip\u003c\/li\u003e\n\u003cli\u003eDetects thermistor open\/short circuit and sensor failure\u003c\/li\u003e\n\u003cli\u003eGalvanic isolation between control and sensor circuits\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eTechnical Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eArticle Number:\u003c\/strong\u003e 3RN2011-1BA30\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Thermistor motor protection relay\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eControl Supply Voltage:\u003c\/strong\u003e 24 V AC\/DC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRelay Output:\u003c\/strong\u003e 2 change-over (DPDT)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 22.5 mm (DIN-rail mount)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtection Function:\u003c\/strong\u003e Overtemperature monitoring via PTC sensors\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSensor Fault Detection:\u003c\/strong\u003e Open\/short circuit monitoring supported\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsulation Voltage:\u003c\/strong\u003e approx. 300 V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSurge Withstand Voltage:\u003c\/strong\u003e approx. 4 kV\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtection Rating:\u003c\/strong\u003e IP20 (requires enclosure)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReset Method:\u003c\/strong\u003e Manual or remote reset input\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eService Life:\u003c\/strong\u003e Designed for long electrical and mechanical endurance typical of SIRIUS relays\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eCompliance \u0026amp; Standards\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMeets IEC\/EN standards for thermistor-based motor protection\u003c\/li\u003e\n\u003cli\u003eGalvanic separation ensures safe circuit interfacing\u003c\/li\u003e\n\u003cli\u003eAvailable for use in industrial environments, including enhanced protection when used with approved PTC sensors\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eApplications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eSuitable for overload and overtemperature protection of three-phase motors in pumps, conveyors, compressors, fans, processing machines or equipment operating under intermittently heavy load conditions. Commonly used where precise thermal monitoring is required beyond standard overload relays, especially in harsh duty or low cooling environments.\u003c\/p\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":40775036403776,"sku":"3RN2011-1BA30","price":1119.49,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0556\/3662\/3424\/files\/3RN2011-1BA30.jpg?v=1764928727","url":"https:\/\/industrial.rubicon.tech\/products\/siemens-thermistor-motor-protection-relay-screw-2-c-o-24vac-dc","provider":"Rubicon Group Industrial Technology Shop","version":"1.0","type":"link"}