{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4302-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4302-7","canonicalUrl":"https://aoctrl.com/siemens/5SY4302-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4302-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY4302-7, 3-pole miniature circuit breaker, C-curve, 10 kA (EN 60898-1) / 35 kA (IEC 60947-2), 400 V AC, IP20.","salesMarkdown":"## What this breaker is and what it does The Siemens 5SY4302-7 is a 3-pole miniature circuit breaker from the SENTRON series, designed for branch-circuit protection in industrial control panels and distribution boards. It carries a C-curve tripping characteristic, meaning it tolerates moderate inrush currents — typical for motor starters, contactor coils, and small transformers — before tripping magnetically at 5 to 10 times rated current. The part is rated for 400 V AC and 60 V DC, with a frequency range of 50/60 Hz. ## Breaking capacity — what the ratings mean for fit The 5SY4302-7 is certified under three standards, each with a different interrupting rating. Per EN 60898-1 it is rated 10 kA; per IEC 60947-2 it is rated 35 kA; and per UL 1077 / CSA C22.2 No.235 it is rated 5 kA. For DC circuits, the IEC 60947-2 rating is 15 kA at 72 V DC maximum. These numbers govern where the breaker can be installed: the 35 kA IEC rating suits high-fault industrial mains, while the 5 kA UL figure limits it to supplementary protection in North American panels. The 10 kA EN rating covers most European residential and light commercial distribution boards. ## Mounting and environmental notes The breaker occupies 3 modular width units (54 mm,) and installs on a DIN rail via the quick-assembly system. Mounting position is any; installation depth is 70 mm, overall depth 76 mm. The enclosure is IP20 with connected conductors, rated for pollution degree 3 and overvoltage category III. Ambient temperature range is -40 °C to 75 °C, with humidity limits per. The housing is halogen-free and silicon-free, which matters for clean-room or high-reliability environments where outgassing can contaminate contacts or optics.","metaTitle":"Siemens 5SY4302-7 SENTRON MCB, 3P C-curve, 10kA IEC, 35kA IE","metaDescription":"Siemens 5SY4302-7 SENTRON miniature circuit breaker, 3-pole, C-curve, 10 kA per EN 60898-1, 35 kA per IEC 60947-2. 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":"5SY4302-7","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, C, 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","Energy Limitation Class":"3","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":"C","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":"$42.51 – $105.02","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/8462c5bfdf2cc9b8c66872536f996482.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=268883&mlfb=5SY4302-7"},"ai":{"faq":[{"question":"What are the key breaking capacity ratings for the 5SY4302-7?","answer":"Per EN 60898-1: 10 kA. Per IEC 60947-2: 35 kA at 400 V AC, 15 kA at 72 V DC. Per UL 1077 / CSA C22.2 No.235: 5 kA."},{"question":"What compliance documentation does Siemens provide for the 5SY4302-7?","answer":"The breaker is certified to IEC / EN 60898-1, IEC / EN 60947-2, and UL 1077 / CSA C22.2 No.235. The housing is halogen-free and silicon-free. Standard Siemens declarations for RoHS and REACH are available per the series documentation."},{"question":"Will the 5SY4302-7 drop into a panel specified around the 5SL4363-7?","answer":"Both are 3-pole SENTRON MCBs with the same modular width (3 MW, 54 mm) and DIN-rail mounting. The 5SL4363-7 is a B-curve variant; the 5SY4302-7 is C-curve. Panel cutouts and busbar compatibility are identical, but the tripping curve differs — verify coordination with downstream devices if replacing a B-curve with a C-curve."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4302-7","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/5SY4302-7 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}}