{"product_id":"siemens-overload-relay-thermal-for-motor-protection-9-12-5a","title":"Siemens Overload relay thermal for motor protection, 9 - 12.5A","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe Siemens 3RU2126-1KB0 is a thermal overload relay from the SIRIUS 3RU2 series, designed to protect three-phase motors against overload, phase failure or phase asymmetry. It mounts onto compatible SIRIUS size-S0 contactors, providing adjustable current protection and an integrated auxiliary contact block for signalling or control feedback. With adjustable current range and robust trip response, it helps safeguard motors and ensure reliable operation in industrial environments.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThermal overload relay — SIRIUS 3RU2 family, size S0\u003c\/li\u003e\n\u003cli\u003eAdjustable overload setting: 9 to 12.5 A\u003c\/li\u003e\n\u003cli\u003eThree-pole (3P) main circuit — protects 3-phase motors\u003c\/li\u003e\n\u003cli\u003eIntegrated auxiliary contacts: 1 NO + 1 NC for signalling or control circuits\u003c\/li\u003e\n\u003cli\u003eOverload class: Class 10 — fast trip under overload conditions\u003c\/li\u003e\n\u003cli\u003ePhase-failure and phase-asymmetry protection included\u003c\/li\u003e\n\u003cli\u003eManual or automatic reset options available\u003c\/li\u003e\n\u003cli\u003eScrew-terminal connections for main and auxiliary circuits — secure wiring\u003c\/li\u003e\n\u003cli\u003eCompact design — mounts directly on SIRIUS S0 contactors\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 3RU2126-1KB0\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Thermal Overload Relay (SIRIUS 3RU2)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize Class:\u003c\/strong\u003e S0 (for matching contactors)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent Setting Range:\u003c\/strong\u003e 9 … 12.5 A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoles (Main Circuit):\u003c\/strong\u003e 3 (three-phase protection)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAuxiliary Contacts:\u003c\/strong\u003e 1 NO + 1 NC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRated Insulation Voltage:\u003c\/strong\u003e up to 690 V AC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSurge Withstand \/ Impulse Voltage Rating:\u003c\/strong\u003e 6 kV\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrip Class:\u003c\/strong\u003e Class 10 (thermal characteristic for overload protection)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMotor Power Rating (AC-3):\u003c\/strong\u003e up to approx. 7.5 kW at 400–500 V, depending on motor and application\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection Type:\u003c\/strong\u003e Screw-type terminals for both main and auxiliary circuits\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmbient Operating Temperature Range:\u003c\/strong\u003e –40 °C to +70 °C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtection Rating:\u003c\/strong\u003e IP20 (suitable for control-cabinet installation)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e Direct mounting on compatible SIRIUS contactors\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eApplications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe 3RU2126-1KB0 is ideal for motor protection in industrial systems: controlling pumps, compressors, conveyor drives, fans, mixers and other three-phase motor-driven equipment. It provides reliable overload and phase-failure protection, while the auxiliary contact allows integration with control circuits, alarms or automation logic. Its compact size and direct-mount design make it suitable for compact motor starter panels and machine control cabinets.\u003c\/p\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":40775033520192,"sku":"3RU2126-1KB0","price":654.57,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0556\/3662\/3424\/files\/3RU2126-1KB0.jpg?v=1765366950","url":"https:\/\/industrial.rubicon.tech\/products\/siemens-overload-relay-thermal-for-motor-protection-9-12-5a","provider":"Rubicon Group Industrial Technology Shop","version":"1.0","type":"link"}