{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4203-8CC11","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4203-8CC11","canonicalUrl":"https://aoctrl.com/siemens/5SY4203-8CC11","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4203-8CC11","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY4203-8CC11 miniature circuit breaker, 2-pole, D tripping characteristic, 3 A rated current, 10 kA breaking capacity at 400 V AC, 72 V DC max, 2 width units (36 mm).","salesMarkdown":"The D tripping characteristic is the main selection differentiator. D-curve breakers have a magnetic trip threshold of 10 to 20 times the rated current (In). For this 3 A unit, that means the magnetic trip activates between 30 A and 60 A. That's deliberately high — it avoids tripping on the inrush of small motors, solenoid valves, or transformers where the initial surge can be 8-12x the running current. D is specifically for inductive loads with high starting peaks. In a panel with a transformer rating that limits prospective short-circuit current to under 10 kA, this breaker coordinates cleanly. For higher fault levels (e.g., close to a large transformer), you'd need a higher interrupting rating or a current-limiting upstream device. The DC rating of 72 V max means it's suitable for 48 V or 60 V DC control circuits, but not for 110 V DC battery banks.","metaTitle":"Siemens 5SY4203-8CC11 SENTRON MCB, 2-Pole D 3 A, 10 kA","metaDescription":"Siemens 5SY4203-8CC11 SENTRON miniature circuit breaker, 2-pole, D-curve, 3 A, 10 kA breaking capacity per EN 60898. Rated 400 V AC, 72 V DC. In current production, available to or","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["2-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Solid":"0.75 ... 35 mm²","Width":"36 mm","title":"5SY4203-8CC11","Height":"90 mm","Sealable":"Yes","Stranded":"0.75 ... 35 mm²","Rated Value":"50/60 Hz","description":"Miniature circuit breaker 400 V 10kA, 2-pole, D, 3 A for railway applications","Halogen-Free":"Yes","Silicon-Free":"Yes","Mounting type":"Quick assembly system","During Storage":"-40 ... +75 °C","Number of poles":"2","Type of voltage":"AC","lifecycle_stage":"current","Mounting position":"any","Installation depth":"70 mm","Product brand name":"SENTRON","Ambient temperature":"-40 ... +70 °C","Product designation":"Miniature circuit breaker","Protection class IP":"IP20, with connected conductors","at AC / rated value":"400 V","Overvoltage category":"III","Combined Terminal Top":"Yes","Design of the product":"For railway applications","Number of width units":"2","Number of poles / Note":"2P","acc. to DIN EN 61346-2":"F","acc. to DIN EN 81346-2":"F","Combined Terminal Bottom":"Yes","Suitability for operation":"Mechanical engineering / industry","Current / at AC / rated value":"3 A","Tripping characteristic class":"D","at DC / rated value / maximum":"72 V","acc. to EN 60898 / rated value":"10 kA","Position / of power supply cord":"Any","Product feature / Touch protection":"Yes","Influence of the surrounding temperature":"max. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C","Tightening torque / with screw-type terminals":"2.5 ... 3.5 N·m","Product function / neutral conductor switching":"No","with multi-phase operation / at AC / rated value":"440 V","with single-phase operation / at AC / rated value":"440 V","Mechanical service life (switching cycles) / typical":"10 000","Tightening torque [lbf·in] / with screw-type terminals":"22 ... 31 lbf·in"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/ac9163a389bc321d5ed04c19bfc43463.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=323156&mlfb=5SY4203-8CC11"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 5SY4203-8CC11?","answer":"Pricing and availability are confirmed at quote time against an RFQ. Submit a request through the distributor channel for a current quote."},{"question":"What is the difference between 5SY4203-8CC11 and 5SY3132-6?","answer":"The 5SY3132-6 is a different rating and curve within the same SENTRON 5SY family. The 5SY4203-8CC11 is a 2-pole D-curve 3 A breaker; the 5SY3132-6 is a different order code with its own rating. They share the same form factor and mounting, but the tripping characteristic and current rating differ — verify your load requirements before substituting."},{"question":"What is 5SY4203-8CC11's listed depth?","answer":"The depth is 76 mm, with an installation depth of 70 mm. Width is 36 mm (2 width units), height is 90 mm."},{"question":"What conductor sizes does 5SY4203-8CC11 accept?","answer":"It accepts solid conductors from 0.75 to 35 mm² and stranded conductors from 0.75 to 35 mm². The screw terminals require a tightening torque of 2.5 to 3.5 N·m."},{"question":"Will 5SY4203-8CC11 drop into a panel specified for 5SY3132-6 without rewiring?","answer":"Both are 2-pole SENTRON breakers on the same 36 mm footprint, so the mechanical fit and busbar connection are identical. However, the electrical ratings (current and tripping curve) differ — confirm the load's inrush and continuous current match the 5SY4203-8CC11's D-curve and 3 A rating before swapping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4203-8CC11","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/siemens/5SY4203-8CC11 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}