{"product_id":"siemens-sirius-3rf2-solid-state-contactor-screw-3-phase-1200v","title":"Siemens Sirius 3RF2 Solid-state contactor, screw, 3-phase, 1200V","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe Siemens 3RF2420-1AC45 is a SIRIUS 3RF2-series 3-phase solid-state contactor designed for switching AC loads in industrial control and automation systems. It provides silent, wear-free switching of three-phase circuits without mechanical contacts — ideal for frequent switching, motor control, heating loads or other AC circuits requiring high reliability and long service life. Its 3-pole design and screw-terminal connections make it suitable for robust installation in control panels and switchboards.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e3-phase solid-state contactor (3 poles)\u003c\/li\u003e\n\u003cli\u003eRated operational current: 20 A (AC-51, 40 °C)\u003c\/li\u003e\n\u003cli\u003eWide load voltage range: 48 … 600 V AC\u003c\/li\u003e\n\u003cli\u003eControl input voltage: 4 … 30 V DC\u003c\/li\u003e\n\u003cli\u003eScrew-terminal main circuit connections — robust for industrial wiring\u003c\/li\u003e\n\u003cli\u003eZero-voltage switching (thyristor-based) for silent, contact-free operation\u003c\/li\u003e\n\u003cli\u003eBlocking voltage (off-state) up to 1200 V — suitable for high-voltage AC systems\u003c\/li\u003e\n\u003cli\u003eCompact SIRIUS 3RF2 housing for DIN-rail or panel mounting\u003c\/li\u003e\n\u003cli\u003eSuitable for frequent switching cycles and continuous operation without mechanical wear\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 3RF2420-1AC45\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Family:\u003c\/strong\u003e SIRIUS 3RF2 solid-state contactors\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Poles (Main Circuit):\u003c\/strong\u003e 3 (three-phase)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRated Operational Current (AC-51, 40 °C):\u003c\/strong\u003e 20 A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLoad Voltage Range (Ue):\u003c\/strong\u003e 48 … 600 V AC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eControl Input Voltage (Us):\u003c\/strong\u003e 4 … 30 V DC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlocking Voltage (Off-state):\u003c\/strong\u003e 1200 V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSwitching Technology:\u003c\/strong\u003e Thyristor — zero-voltage switching (semi-conductor contactor)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMain Contact Configuration:\u003c\/strong\u003e 3 × Normally Open (NO), no mechanical contacts (solid-state)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection Terminals:\u003c\/strong\u003e Screw terminals for main circuit conductors\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtection Class:\u003c\/strong\u003e IP20\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmbient Operating Temperature:\u003c\/strong\u003e 0 … 40 °C (standard rating at 40 °C) with derating as specified\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuitable Load Types:\u003c\/strong\u003e Resistive, inductive, motor loads (when correctly controlled), heaters, etc.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e DIN-rail or panel mount (as per SIRIUS 3RF2 design guidelines)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eCompliance \u0026amp; Certifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned as part of the SIRIUS 3RF2 solid-state switching device family — industrial-grade quality and reliability\u003c\/li\u003e\n\u003cli\u003eSolid-state switching avoids mechanical wear — suitable for frequent switching and automation applications\u003c\/li\u003e\n\u003cli\u003eSuitable for installation in industrial control panels, switchboards and motor control centers under standard low-voltage regulations\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eApplications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe 3RF2420-1AC45 is ideal for silent and reliable switching of three-phase AC loads — such as heaters, resistive and inductive loads, pumps, fans, motor circuits (when coordinated with overload protection), and general automation loads where maintenance-free operation is required. It is especially useful in environments requiring high switching frequency, low noise, or where mechanical contact wear must be avoided. Typical uses include HVAC systems, heating installations, conveyor drives, panel-mounted load switching, and industrial automation control systems.\u003c\/p\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":40775063961664,"sku":"3RF2420-1AC45","price":4507.94,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0556\/3662\/3424\/files\/3RF2420-1AC45.jpg?v=1764231671","url":"https:\/\/industrial.rubicon.tech\/products\/siemens-sirius-3rf2-solid-state-contactor-screw-3-phase-1200v","provider":"Rubicon Group Industrial Technology Shop","version":"1.0","type":"link"}