{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY6603-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY6603-7","canonicalUrl":"https://aoctrl.com/siemens/5SY6603-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SY6603-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY6603-7, 4-pole 3P+N miniature circuit breaker, C-curve, 3 A rated at 35 °C, 400 V AC, 6 kA (EN 60898) / 30 kA (IEC 60947-2), IP20 with conductors, current lifecycle.","salesMarkdown":"## Siemens 5SY6603-7 — 4-pole C-curve MCB for 400 V AC industrial panels Rated 3 A at 35 °C and 400 V AC, it delivers 6 kA breaking capacity per EN 60898 and 30 kA per IEC 60947-2 — the higher figure governs fault-clearing in industrial panels where the upstream transformer can deliver substantial current. ## Breaking capacity and selectivity — what the dual rating means The 6 kA rating under EN 60898 is the domestic/residential standard; the 30 kA rating under IEC 60947-2 is the industrial standard that matters for panel coordination. Energy limitation class 3 means the let-through energy is low enough to protect downstream cables and equipment under fault conditions — relevant when coordinating with downstream sub-circuits or sensitive loads. Overvoltage category III confirms suitability for fixed-installation distribution boards, not just final circuits. ## Thermal derating and environmental range The 3 A rating is at 35 °C ambient. At 40 °C it derates to 2.86 A, at 45 °C to 2.78 A, at 50 °C to 2.71 A, and at 55 °C to 2.62 A. The operating range spans -40 °C to 75 °C, with humidity limits of 95% up to 55 °C, 55% up to 70 °C, and 35% at 75 °C.","metaTitle":"Siemens 5SY6603-7 SENTRON MCB, 4P C-Curve 3A, 30kA IEC 60947","metaDescription":"Siemens 5SY6603-7 SENTRON miniature circuit breaker, 4-pole 3P+N, C-curve 3A, 400V AC. Rated 6kA per EN 60898, 30kA per IEC 60947-2. Current lifecycle. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["4-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"72 mm","title":"5SY6603-7","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 400 V 6kA, 3+N-pole C, 3 A, D=70 mm","Halogen-Free":"Yes","Silicon-Free":"Yes","Number Of Poles":"4","Type Of Voltage":"AC","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":"400 V","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","Number Of Poles / Note":"3P+N","acc. to DIN EN 61346-2":"F","Energy Limitation Class":"3","at 35 °C / rated value":"3 A","at 40 °C / rated value":"2.86 A","at 45 °C / rated value":"2.78 A","at 50 °C / rated value":"2.71 A","at 55 °C / rated value":"2.62 A","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Number Of Modular Width Units":"4","Tripping Characteristic Class":"C","acc. to EN 60898 / rated value":"6 kA","Position / Of Power Supply Cord":"Any","acc. to IEC 60947-2 / rated value":"30 kA","Product Feature / Touch Protection":"Yes","Supply Voltage Frequency / Rated Value":"50/60 Hz","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","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 Function / Neutral Conductor Switching":"Yes","with multi-phase operation / at AC / rated value":"440 V","operating voltage / at DC / rated value / maximum":"72 V","with single-phase operation / at AC / rated value":"440 V","Mechanical Service Life (Operating Cycles) / Typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/b10d17937dba6c7ae55377655dbbe118.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=297425&mlfb=5SY6603-7"},"ai":{"faq":[{"question":"Where can I buy 5SY6603-7 and how do I get a price?","answer":"The 5SY6603-7 is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead-time estimate."},{"question":"What is 5SY6603-7's breaking capacity under IEC 60947-2?","answer":"It is rated 30 kA at 400 V AC under IEC 60947-2, which is the industrial standard for panel coordination. The EN 60898 rating is 6 kA."},{"question":"What is the thermal derating for 5SY6603-7 above 35 °C?","answer":"At 40 °C the rated current drops to 2.86 A, at 45 °C to 2.78 A, at 50 °C to 2.71 A, and at 55 °C to 2.62 A. Apply this curve when the panel ambient exceeds 35 °C."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY6603-7","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/5SY6603-7 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}}