{"product_id":"siemens-power-contactor-3-pole-size-s0-1no-1nc-18-5kw","title":"Siemens Power contactor, 3-pole, size S0, 1NO+1NC, 18.5kW","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe Siemens 3RT2028-2BB40 is a 3-pole power contactor from the SIRIUS 3RT2 series. It is designed to switch and control three-phase motors and other AC loads, offering reliable contact switching for industrial and automation applications. With a 24 V DC coil and integrated auxiliary contacts, this contactor serves as a robust main switching device in motor starters, control panels, and machine installations.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e3-pole power contactor (main contacts for three-phase switching)\u003c\/li\u003e\n\u003cli\u003eRated for up to 38 A current — suitable for medium-power motors and AC loads\u003c\/li\u003e\n\u003cli\u003eMotor power rating up to 18.5 kW at 400 V (AC-3 \/ AC-3e operation)\u003c\/li\u003e\n\u003cli\u003eControl coil: 24 V DC — compatible with standard control-voltage circuits\u003c\/li\u003e\n\u003cli\u003eIncludes 1 auxiliary contact (1 NO + 1 NC) for control logic or signalling feedback\u003c\/li\u003e\n\u003cli\u003eSpring-loaded terminals for secure, reliable wiring and quick installation\u003c\/li\u003e\n\u003cli\u003eSize designation S0 — compact footprint, suitable for standard control cabinets or motor-starter assemblies\u003c\/li\u003e\n\u003cli\u003eInsulation voltage rating up to 690 V, with surge voltage resistance up to 6 kV — suitable for industrial environments\u003c\/li\u003e\n\u003cli\u003eProtection class on the front: IP20 — intended for installation in enclosed control panels or switchgear housing\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 (MLFB):\u003c\/strong\u003e 3RT2028-2BB40\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Family \/ Type:\u003c\/strong\u003e SIRIUS 3RT2 — 3-pole power contactor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoles (Main Contacts):\u003c\/strong\u003e 3 (for three-phase switching)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRated Current (Ie):\u003c\/strong\u003e 38 A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRated Motor Power (AC-3 \/ AC-3e):\u003c\/strong\u003e 18.5 kW @ 400 V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eControl Coil Voltage:\u003c\/strong\u003e 24 V DC\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\u003eTerminal Type:\u003c\/strong\u003e Spring-loaded terminals\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsulation Voltage (pollution degree 3):\u003c\/strong\u003e 690 V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSurge Voltage Resistance:\u003c\/strong\u003e 6 kV\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtection Class:\u003c\/strong\u003e IP20 (front) — requires installation inside enclosed panel \/ cabinet\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContactor Size:\u003c\/strong\u003e S0\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDesigned For:\u003c\/strong\u003e AC-3 \/ AC-3e load switching (three-phase motors, general industrial loads)\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\u003ePart of the SIRIUS 3RT2 range — widely used in industrial motor control and automation.\u003c\/li\u003e\n\u003cli\u003eMeets standard insulation and surge-voltage resistance requirements for industrial control gear.\u003c\/li\u003e\n\u003cli\u003eDesigned for enclosed-panel installation (IP20) in compliance with typical control-gear housing standards.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eApplications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe 3RT2028-2BB40 is well suited for controlling motors and general AC loads in industrial automation, manufacturing, HVAC systems, pumps, conveyors, compressors, and machine-starter assemblies. Its combination of 38 A capacity, 18.5 kW switching capability, and auxiliary contact for feedback\/control logic makes it useful in motor starters, contactor-relay control circuits, and as a main switching element in control cabinets for industrial machines and plant equipment.\u003c\/p\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":40775035355200,"sku":"3RT2028-2BB40","price":3116.57,"currency_code":"ZAR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0556\/3662\/3424\/files\/3RT2028-2BB40.jpg?v=1765269470","url":"https:\/\/industrial.rubicon.tech\/products\/siemens-power-contactor-3-pole-size-s0-1no-1nc-18-5kw","provider":"Rubicon Group Industrial Technology Shop","version":"1.0","type":"link"}