{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY7306-8","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY7306-8","canonicalUrl":"https://aoctrl.com/siemens/5SY7306-8","factsUrl":"https://aoctrl.com/api/mcp/products/5SY7306-8","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON miniature circuit breaker, 3-pole, D tripping characteristic, 15 kA (EN 60898) / 40 kA (IEC 60947-2), 400 V AC, width 54 mm, depth 76 mm.","salesMarkdown":"The Siemens SENTRON 5SY7306-8 is a 3-pole miniature circuit breaker with a D tripping characteristic, rated for 15 kA per EN 60898 and 40 kA per IEC 60947-2. It's a current-production part, so no last-time-buy scramble; we source it against an RFQ. Three breaking-capacity ratings cover the major standards: 15 kA at 400 V AC per EN 60898 (the household/commercial standard), 40 kA at 400 V AC per IEC 60947-2 (industrial, for higher-fault panels), and 5 kA per UL 1077 (North American supplementary protection). DC side: 15 kA at 60 V per IEC 60947-2, with a max DC operating voltage of 72 V. That covers 48 VDC control buses and some battery circuits, but not 125 VDC telecom plants. The 90 mm height is the body; clearance above for the toggle is about 10 mm. IP20 with conductors connected — fine inside a closed panel, not for wet areas.","metaTitle":"Siemens SENTRON 5SY7306-8 MCB, 3P D-Curve, 15/40 kA","metaDescription":"Siemens SENTRON 5SY7306-8 miniature circuit breaker, 3-pole D-curve, rated 15 kA (EN 60898) / 40 kA (IEC 60947-2). Current production. Quoted to order against RFQ.","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":"5SY7306-8","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 15kA, 3-pole, D, 6 A, 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":"15 kA","according to IEC 60947-2 rated value":"40 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":"1.6 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/5e52e367c19a83accd0a294d544333fc.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=195946&mlfb=5SY7306-8"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SY7306-8?","answer":"15 kA per EN 60898 at 400 V AC, 40 kA per IEC 60947-2 at 400 V AC, and 5 kA per UL 1077. For DC circuits it's 15 kA at 60 V per IEC 60947-2."},{"question":"What does the D-curve mean on this breaker?","answer":"The D tripping characteristic allows the breaker to ride through high inrush currents typical of motor starts, transformer energization, and welding loads — it trips magnetically at 10–20× In, compared to 5–10× for a C-curve. That prevents nuisance trips on inductive loads while still providing short-circuit protection."},{"question":"Where can I buy 5SY7306-8 and how is it quoted?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock count or price is listed here."},{"question":"Will 5SY7306-8 drop into a panel specified around 5SY4116-7CV?","answer":"The 5SY7306-8 is a 3-pole D-curve breaker with 15/40 kA breaking capacity, while the 5SY4116-7CV is a different rating and curve. Both share the same SENTRON 5SY family footprint — 3 modular widths (54 mm), same DIN-rail mounting and terminal layout — so mechanical fit is identical. The deciding factor is the electrical rating: verify that the 5SY7306-8's current rating and D-curve match your circuit requirements before swapping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY7306-8","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/5SY7306-8 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}}