{"product_id":"siemens-circuit-breaker-3-pole-b-curve-20a-10ka","title":"Siemens Circuit breaker, 3-pole, B-curve, 20A, 10kA","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe Siemens SENTRON 5SY4320-6 is a three-pole miniature circuit breaker (MCB) designed for reliable protection of final circuits in industrial and commercial installations. It features a B-curve tripping characteristic, 20 A rated current, and a high breaking capacity of 10 kA at 400 V AC. With compact depth (D = 70 mm), DIN-rail mounting, and robust mechanical endurance, it integrates easily into distribution boards and control panels.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRated Current:\u003c\/strong\u003e 20 A (B-curve)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 3-pole for three-phase circuits\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBreaking Capacity:\u003c\/strong\u003e 10 kA at 400 V AC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperating Voltage:\u003c\/strong\u003e 230\/400 V AC; 72 V DC (per pole)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact Form:\u003c\/strong\u003e Depth 70 mm for space-efficient panels\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTerminals:\u003c\/strong\u003e Screw clamp, wide conductor range\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e 35 mm DIN-rail (EN 60715)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurability:\u003c\/strong\u003e ~10,000 mechanical switching operations\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety Design:\u003c\/strong\u003e Overvoltage category III; pollution degree 3\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 SENTRON 5SY4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eArticle Number:\u003c\/strong\u003e 5SY4320-6\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrip Characteristic:\u003c\/strong\u003e B\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRated Voltage (AC):\u003c\/strong\u003e 230\/400 V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRated Insulation Voltage (Ui):\u003c\/strong\u003e 440 V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRated DC Voltage:\u003c\/strong\u003e 72 V DC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRated Short-Circuit Breaking Capacity:\u003c\/strong\u003e 10 kA (at 400 V AC)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Poles:\u003c\/strong\u003e 3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEndurance (Mechanical):\u003c\/strong\u003e ~10,000 operations\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtection Class:\u003c\/strong\u003e IP20 (terminals finger-safe)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmbient Operating Temperature:\u003c\/strong\u003e –25 °C to +45 °C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e Depth 70 mm (DIN-rail height\/width per standard module spacing)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConductor Size (typ.):\u003c\/strong\u003e ~1…25 mm² (screw clamp)\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\u003e\n\u003cstrong\u003eStandards:\u003c\/strong\u003e EN 60898 (MCBs), UL 1077 \/ CSA C22.2 No. 235 (supplementary protector)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCE Marking:\u003c\/strong\u003e Conforms to applicable EU directives\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRoHS:\u003c\/strong\u003e Compliant (hazardous-substance restricted)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Class:\u003c\/strong\u003e Low-voltage miniature circuit breaker for distribution and control\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eApplications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eIdeal for branch-circuit protection in distribution boards, control panels, and machine control wiring. Commonly used for lighting and receptacle circuits, auxiliary loads, and general three-phase final circuits requiring B-curve protection and 10 kA breaking capacity.\u003c\/p\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":40775103250496,"sku":"5SY4320-6","price":1104.76,"currency_code":"ZAR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0556\/3662\/3424\/files\/5SY4320-6.jpg?v=1761130231","url":"https:\/\/industrial.rubicon.tech\/products\/siemens-circuit-breaker-3-pole-b-curve-20a-10ka","provider":"Rubicon Group Industrial Technology Shop","version":"1.0","type":"link"}