{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY5203-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY5203-7","canonicalUrl":"https://aoctrl.com/siemens/5SY5203-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SY5203-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY5203-7, 2-pole miniature circuit breaker, C-curve, 10 kA breaking capacity per IEC/EN 60898-2, 15 kA DC per IEC 60947-2, 400 V AC / 440 V DC, 2 MW, IP20.","salesMarkdown":"The 5SY5203-7: Width is 36 mm (2 modular units), depth 76 mm, height 90 mm, with a 70 mm installation depth behind the panel face. Combined top and bottom terminals simplify daisy-chaining in multi-pole groups. ## Voltage and environmental ratings Rated operating voltage 400 V AC (single- or multi-phase) and 440 V DC; maximum DC voltage 500 V. Frequency 50/60 Hz. Ambient temperature range -40 °C to +75 °C, with humidity derating: 95% RH up to 55 °C, 55% RH to 70 °C, 35% RH to 75 °C. Vibration resistance per IEC 60068-2-6: ±1 mm at 5–25 Hz, 50 m/s² at 25–150 Hz. Certified to IEC/EN 60898-2 and UL 1077. Halogen-free and silicon-free construction; sealable for tamper-proof installations. Energy limitation class 3. Neutral conductor is not switched. For DC operation, observe polarity as marked. The manufacturer provides standard compliance documentation (RoHS, REACH, CE, UKCA) with the product.","metaTitle":"Siemens 5SY5203-7 SENTRON MCB, 2P C-Curve, 10 kA IEC, 15 kA","metaDescription":"Siemens 5SY5203-7 SENTRON miniature circuit breaker, 2-pole, C-curve, 10 kA (IEC 60898) / 15 kA (DC IEC 60947-2). Active production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["2-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"36 mm","title":"5SY5203-7","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Standard":"IEC / EN 60898-2, UL1077","description":"Circuit breaker Universal current 440 V DC 400 V AC 10kA, 2-pole, C, 03A","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"2P","Number Of Poles":"2","lifecycle_stage":"current","Fastening Method":"Quick assembly system","Mounting Position":"any","at AC rated value":"400 V","at DC rated value":"440 V","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"3","Product Designation":"Miniature circuit breaker","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","Energy Limitation Class":"3","Combined Terminal Bottom":"Yes","Suitability For Operation":"universal current","Neutral Conductor Switching":"No","Number Of Modular Width Units":"2","Position Of Power Supply Cord":"AC as required, observe DC polarity","Tripping Characteristic Class":"C","at DC according to EN 60898-2":"10 kA","according to EN 60898 rated value":"10 kA","Influence Of The Surrounding Temperature":"max. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C","Type Of Voltage Of The Operating Voltage":"AC/DC","at DC according to IEC 60947-2 rated value":"15 kA","Value Range Of The Supply Voltage Frequency":"50/60 Hz","operating voltage at DC rated value maximum":"500 V","with multi-phase operation at AC rated value":"440 V","with single-phase operation at AC rated value":"440 V","vibration resistance according to IEC 60068-2-6":"±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz","Mechanical Service Life (Operating Cycles) Typical":"10 000","Product Extension Installable Supplementary Devices":"Yes","power loss [W] for rated value of the current at AC in hot operating state per pole":"1.3 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/55ad95946a37b3540783eeb2a8ab1519.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=6288&mlfb=5SY5203-7"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SY5203-7?","answer":"10 kA per IEC/EN 60898-2, and 15 kA at DC per IEC 60947-2. This covers most panel-feed and sub-distribution fault levels."},{"question":"Will 5SY5203-7 drop into a panel designed for 5SY5202-6?","answer":"Yes — both are 2-pole SENTRON MCBs with the same 36 mm width, DIN-rail mount, and C-curve. The 5SY5203-7 has a higher breaking capacity (10 kA vs the 5SY5202-6's lower rating), so it is a functional upgrade without rewiring."},{"question":"What compliance documentation does Siemens provide for 5SY5203-7?","answer":"Standard RoHS, REACH, CE, and UKCA declarations are provided with the product. The MCB is certified to IEC/EN 60898-2 and UL 1077."},{"question":"How do I get current pricing and availability for 5SY5203-7?","answer":"Submit an RFQ through this listing. Availability and current pricing are confirmed at quote time through independent distribution channels."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY5203-7","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/5SY5203-7 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}}