{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4304-7CV","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4304-7CV","canonicalUrl":"https://aoctrl.com/siemens/5SY4304-7CV","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4304-7CV","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 5SY4304-7CV, 3-pole miniature circuit breaker, C-curve, 4 A rated, 15 kA breaking capacity at 400 V AC, IEC 60947-2, IP20 with conductors connected.","salesMarkdown":"## Siemens 5SY4304-7CV — 3-pole C4 MCB for industrial panel protection The Siemens 5SY4304-7CV is a 3-pole miniature circuit breaker with a C-curve trip characteristic, rated 4 A and a 15 kA breaking capacity at 400 V AC per IEC 60947-2. It is designed for mechanical engineering and industrial panel applications, protecting branch circuits against overload and short-circuit faults. DC operation is limited to 72 V maximum, so this is an AC-primary device — do not spec it for a DC bus above that voltage. For a BOM freeze or line-down replacement, this part is a direct drop-in fit for any panel specified with the Siemens 5SY4 series 3-pole C-curve breakers. No rewiring or busbar rework needed if the existing breaker is the same pole count and form factor. Sealable — lockable with a padlock for lockout/tagout compliance. In a densely packed enclosure, account for this self-heating; the breaker's own derating curve (95 % at 55 °C, 55 % at 70 °C, 35 % at 75 °C) governs the actual continuous current you can pull. Vibration resistance per IEC 60068-2-6: ±1 mm at 5–25 Hz, 50 m/s² at 25–150 Hz. Mechanical service life typical 10,000 operating cycles — sufficient for most industrial switching duties where the breaker is cycled infrequently (maintenance isolation, not daily load switching). Degree of pollution 3, overvoltage category III — suitable for fixed industrial installations where conductive pollution or condensation may occur.","metaTitle":"Siemens 5SY4304-7CV MCB, 3P C4, 15 kA at 400 V AC","metaDescription":"Siemens 5SY4304-7CV 3-pole MCB, C-curve, 4 A rated, 15 kA breaking capacity at 400 V AC per IEC 60947-2. Active production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["3-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"54 mm","title":"5SY4304-7CV","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Standard":"IEC / EN 60947-2","description":"MCB Icu=15KA 400V 3P C4","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","Degree Of Pollution":"3","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":"C","Supply Voltage Frequency Rated Value":"50/60 Hz","according to IEC 60947-2 rated value":"15 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","operating voltage at DC rated value maximum":"72 V","with multi-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/d19db11f4c899db9c169ef948e58c464.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1531576&mlfb=5SY4304-7CV"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SY4304-7CV?","answer":"15 kA at 400 V AC per IEC 60947-2. This is the rated ultimate short-circuit breaking capacity (Icu) for the 3-pole configuration."},{"question":"Will 5SY4304-7CV drop into a panel specified for 5SY4310-7CV?","answer":"Yes — same 3-pole footprint, same DIN-rail mounting, same 54 mm width and 76 mm depth. The only difference is the current rating: 4 A vs 10 A. No rewiring or busbar change needed if the panel was designed for the 5SY4 3-pole form factor."},{"question":"Where can I buy 5SY4304-7CV?","answer":"Sourced and quoted to order against an RFQ through independent industrial-automation distribution. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4304-7CV","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/5SY4304-7CV 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}}