{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY7503-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY7503-7","canonicalUrl":"https://aoctrl.com/siemens/5SY7503-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SY7503-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY7503-7 miniature circuit breaker, 3 A, C characteristic, 2-pole (1P+N), 15 kA (EN 60898) / 40 kA (IEC 60947-2), 36 mm wide, IP20.","salesMarkdown":"The Siemens SENTRON 5SY7503-7 is a 2-pole miniature circuit breaker (1P+N design) rated at 3 A with a C tripping characteristic. It provides a breaking capacity of 15 kA per EN 60898 and 40 kA per IEC 60947-2, making it suitable for branch-circuit protection in industrial control panels where moderate inrush currents from motor starters or contactor coils are expected. The 3 A rating at 35 °C is the baseline; at 40 °C it derates to 2.82 A, at 50 °C to 2.62 A, and at 60 °C to 2.41 A (–). For a panel that runs warm — say 50 °C inside the enclosure — the breaker will carry 2.62 A continuously without nuisance tripping. The C-curve means the magnetic trip threshold is 5 to 10 times the rated current, so it holds through the inrush of a small contactor or a 3 A transformer primary but clears a hard short quickly. Breaking capacity: 15 kA per EN 60898 covers the domestic / light commercial fault level; 40 kA per IEC 60947-2 is the industrial rating, which means this breaker can be used downstream of a transformer with a high prospective short-circuit current without needing a current-limiting fuse upstream. The DC breaking capacity per IEC 60947-2 is 15 kA, relevant if the breaker is used in a DC distribution circuit. The 36 mm width occupies 2 modular units on a DIN rail. IP20 with connected conductors — finger-safe terminals but not washdown-rated; keep it inside a sealed panel. ## Deployment context Halogen-free and silicon-free construction is specified for environments where outgassing could contaminate contacts or optics.","metaTitle":"Siemens 5SY7503-7 SENTRON MCB, 3A C-Curve, 2-Pole, 15kA","metaDescription":"Siemens 5SY7503-7 SENTRON miniature circuit breaker, 3 A rated, C tripping characteristic, 2-pole (1P+N), 15 kA breaking capacity per EN 60898, 40 kA per IEC 60947-2. Current produ","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"36 mm","title":"5SY7503-7","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 230 V 15kA, 1+N-pole, C, 3 A, D=70 mm","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"1P+N","Number Of Poles":"2","lifecycle_stage":"current","Fastening Method":"Quick assembly system","Mounting Position":"any","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"3","Product Designation":"Miniature circuit breaker","acc. to IEC 81346-2":"F","at AC / rated value":"3 A","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","acc. to DIN EN 61346-2":"F","Energy Limitation Class":"3","at 35 °C / rated value":"3 A","at 40 °C / rated value":"2.82 A","at 45 °C / rated value":"2.72 A","at 50 °C / rated value":"2.62 A","at 55 °C / rated value":"2.52 A","at 60 °C / rated value":"2.41 A","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Number Of Modular Width Units":"2","Tripping Characteristic Class":"C","acc. to EN 60898 / rated value":"15 kA","Position / Of Power Supply Cord":"Any","acc. to IEC 60947-2 / rated value":"40 kA","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","at DC / acc. to IEC 60947-2 / rated value":"15 kA","Type Of Voltage / Of The Operating Voltage":"AC","at AC / acc. to UL 1077 and CSA C22.2 No.235":"5 kA","vibration resistance / acc. to IEC 60068-2-6":"±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz","Product Component / Neutral Conductor Switching":"Yes","operating voltage / at DC / rated value / maximum":"72 V","with single-phase operation / at AC / rated value":"250 V","Mechanical Service Life (Switching Cycles) / Typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/d847316e1f8cf9187dcda1da074d503d.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=138672&mlfb=5SY7503-7"},"ai":{"faq":[{"question":"Where can I buy 5SY7503-7 and how do I get a price?","answer":"The 5SY7503-7 is sourced to order against an RFQ through independent distribution. Submit an RFQ for current availability and pricing — confirmed at quote time."},{"question":"What is the breaking capacity of 5SY7503-7?","answer":"Per EN 60898 it is rated 15 kA; per IEC 60947-2 it is rated 40 kA. The DC breaking capacity per IEC 60947-2 is 15 kA."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY7503-7","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/5SY7503-7 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}}