{"product_id":"siemens-sirius-soft-starter-s2-spring-terminals-24vac-dc-63a","title":"Siemens SIRIUS Soft starter, S2, spring terminals, 24VAC\/DC, 63A","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe Siemens 3RW4037-2BB04 is a SIRIUS 3RW40 soft starter (size S2) designed for gentle, controlled starting of three-phase induction motors. It supports a rated operational current of 63 A and is suitable for motors up to 30 kW at 400 V. With an operating voltage range of 200…480 V AC and a 24 V AC\/DC control supply, this soft starter provides reliable reduction of starting current, minimized mechanical stress, and improved system protection. An integrated bypass contact system increases efficiency and reduces heat dissipation once the motor reaches full speed.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSoft starter for three-phase induction motors (SIRIUS 3RW40 series)\u003c\/li\u003e\n\u003cli\u003eRated operational current: 63 A\u003c\/li\u003e\n\u003cli\u003eMotor power rating: up to 30 kW at 400 V\u003c\/li\u003e\n\u003cli\u003eSupply voltage range: 200…480 V AC\u003c\/li\u003e\n\u003cli\u003eControl supply voltage: 24 V AC\/DC\u003c\/li\u003e\n\u003cli\u003eIntegrated bypass contact system for efficient operation\u003c\/li\u003e\n\u003cli\u003eThyristor-based soft start and soft stop functionality\u003c\/li\u003e\n\u003cli\u003eSpring-type terminals for the control circuit; screw terminals for the main circuit\u003c\/li\u003e\n\u003cli\u003eCompact size S2 housing (55 mm width)\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\u003eProduct Series:\u003c\/strong\u003e SIRIUS 3RW40\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eArticle Number:\u003c\/strong\u003e 3RW4037-2BB04\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRated Operational Current (Ie):\u003c\/strong\u003e 63 A at 40 °C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRated Motor Output:\u003c\/strong\u003e 30 kW at 400 V AC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMain Voltage (Ue):\u003c\/strong\u003e 200…480 V AC, 3-phase\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eControl Supply Voltage (Us):\u003c\/strong\u003e 24 V AC\/DC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 55 mm (Size S2)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e approx. 160 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDepth:\u003c\/strong\u003e approx. 170 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperating Ambient Temperature:\u003c\/strong\u003e –25 °C to +60 °C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMain Terminal Conductor Sizes:\u003c\/strong\u003e Solid 1.5–16 mm², stranded up to 35 mm²\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Poles:\u003c\/strong\u003e 3-pole motor circuit\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 to Siemens SIRIUS soft starter standards\u003c\/li\u003e\n\u003cli\u003eConforms to IEC\/EN 60947-4-2 for motor starting devices\u003c\/li\u003e\n\u003cli\u003eMeets industrial safety, performance, and reliability requirements\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eApplications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eSuitable for pumps, fans, compressors, conveyors, and general machinery requiring smooth motor acceleration. The soft starter reduces mechanical wear, limits inrush current, and provides a more efficient alternative to traditional star-delta starters in industrial automation and process environments.\u003c\/p\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":40775083556928,"sku":"3RW4037-2BB04","price":17089.84,"currency_code":"ZAR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0556\/3662\/3424\/files\/3RW4037-2BB04.jpg?v=1763024089","url":"https:\/\/industrial.rubicon.tech\/products\/siemens-sirius-soft-starter-s2-spring-terminals-24vac-dc-63a","provider":"Rubicon Group Industrial Technology Shop","version":"1.0","type":"link"}