{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4302-8CC","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4302-8CC","canonicalUrl":"https://aoctrl.com/siemens/5SY4302-8CC","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4302-8CC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY4302-8CC, miniature circuit breaker, 3-pole, D tripping characteristic, 2 A rated current, 10 kA breaking capacity at 400 V AC per EN 60898.","salesMarkdown":"The Siemens 5SY4302-8CC is a SENTRON miniature circuit breaker, 3-pole, D-curve, rated 2 A with a 10 kA breaking capacity at 400 V AC per EN 60898. This is the part for a panel line where you need a D-curve trip to handle high inrush from small motor or transformer loads — the D characteristic tolerates the momentary surge without nuisance tripping, then clears fast on a hard fault. That standard covers household and similar installations; for industrial panels with higher available fault current, check the UL 1077 / CSA C22.2 No. 235 rating of 5 kA — that's the figure for North American acceptance. The D-curve means the magnetic trip fires at 10 to 20 times rated current, so a 2 A breaker trips magnetically between 20 A and 40 A. That's sized for loads like small control transformers or contactor coils that draw a brief inrush well above their running current. The DC rating tops out at 72 V, so this is an AC-only part in a 400 V panel. Three poles, no neutral switching — it breaks all three phases, but the neutral runs through. That's standard for a 3-phase motor or distribution subfeed where the neutral is bonded elsewhere. That's low enough that thermal buildup in a crowded enclosure is manageable, but if you're packing 20 of these in a row, the cumulative heat matters. Derate per the ambient curve: max 95% humidity up to 55 °C, dropping to 35% at 75 °C. Width is 54 mm (3 modular units at 18 mm each), depth 76 mm, installation depth 70 mm. That's a standard 3-pole MCB footprint — drops into any DIN-rail enclosure that accepts 3-module-wide breakers. Sealable, halogen-free, silicon-free.","metaTitle":"Siemens 5SY4302-8CC SENTRON MCB, 3P D 2A 10kA","metaDescription":"Siemens 5SY4302-8CC SENTRON miniature circuit breaker, 3-pole, D-curve, 2A, 10kA breaking capacity per EN 60898. Sourced to order. Request quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"Depth":"76 mm","Width":"54 mm","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","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","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","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","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","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":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=273237&mlfb=5SY4302-8CC","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY4302-8CC/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 5SY4302-8CC?","answer":"Sourced to order through independent distribution. Submit an RFQ for current pricing and availability — confirmed at quote time."},{"question":"What is the difference between 5SY4302-8CC and 5SY4304-7CV?","answer":"The 5SY4304-7CV is a 4 A C-curve breaker; the 5SY4302-8CC is a 2 A D-curve. The C-curve trips magnetically at 5-10x rated current, the D-curve at 10-20x. Both are 3-pole SENTRON MCBs with the same 10 kA breaking capacity and same physical footprint — they swap in the same DIN-rail slot, but the trip curve and amp rating must match the circuit design."},{"question":"What compliance documentation does Siemens provide for 5SY4302-8CC?","answer":"The breaker carries ratings per EN 60898 (10 kA at 400 V AC) and per UL 1077 / CSA C22.2 No. 235 (5 kA). It is halogen-free and silicon-free. Standard Siemens documentation includes the declaration of conformity and CE marking; RoHS and REACH compliance is typical for the SENTRON series."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4302-8CC","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/5SY4302-8CC when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}