{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4302-8","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4302-8","canonicalUrl":"https://aoctrl.com/siemens/5SY4302-8","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4302-8","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY4302-8, 3-pole miniature circuit breaker, D tripping characteristic, 10 kA (EN 60898) / 35 kA (IEC 60947-2) breaking capacity at 400 V AC, 3 modular width units.","salesMarkdown":"## Breaking capacity and trip curve — what governs fit The 5SY4302-8 carries a dual breaking-capacity rating: 10 kA per EN 60898-1 and 35 kA per IEC 60947-2 at 400 V AC. Rated 400 V AC (440 V max for single- or multi-phase operation) and 60 V DC (72 V max) across three poles. The DC rating is low relative to the AC figure — expect to derate further if series-strapping poles for higher DC voltage. Mounting position is unrestricted — vertical, horizontal, or flat — so it fits tight sub-panels where orientation is constrained. The breaker is sealable, halogen-free, and silicon-free — a requirement in paint-shop or clean-room environments where outgassing contaminates the process. ## Lifecycle and sourcing — active, quoted to order This is a current-production SENTRON 5SY4-series MCB. No end-of-life notice has been issued. Certified to IEC/EN 60898-1 for residential-style installation and IEC/EN 60947-2 / UL 1077 for industrial supplementary protection. The UL 1077 listing (5 kA at AC) is the ceiling for North American panelboard applications where the breaker serves as supplementary protection behind a branch-circuit OCPD.","metaTitle":"Siemens 5SY4302-8 SENTRON 3-Pole MCB, D-Curve, 10/35kA","metaDescription":"Siemens 5SY4302-8 SENTRON 3-pole MCB, D tripping characteristic, 10 kA (EN 60898) / 35 kA (IEC 60947-2) breaking capacity. Active production, sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["3-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"54 mm","title":"5SY4302-8","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Standard":"IEC / EN 60898-1, IEC / EN 60947-2 / UL1077","description":"Miniature circuit breaker 400 V 10kA, 3-pole, D, 2A, D=70 mm","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"3P","Number Of Poles":"3","lifecycle_stage":"current","Fastening Method":"Quick assembly system","Mounting Position":"any","at AC rated value":"400 V","at DC rated value":"60 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","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Neutral Conductor Switching":"No","Number Of Modular Width Units":"3","Position Of Power Supply Cord":"Any","Tripping Characteristic Class":"D","according to EN 60898 rated value":"10 kA","according to IEC 60947-2 rated value":"35 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","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":"72 V","with multi-phase operation at AC rated value":"440 V","with single-phase operation at AC rated value":"440 V","at AC according to UL 1077 and CSA C22.2 No.235":"5 kA","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","supply voltage with single-phase operation at AC rated value":"230 V","power loss [W] for rated value of the current at AC in hot operating state per pole":"1.2 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$48.26","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/a5fdafee6e3d06c1f1229dd7c9aaa259.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=192026&mlfb=5SY4302-8"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4302-8","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/5SY4302-8 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}}