{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY6304-8CC","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY6304-8CC","canonicalUrl":"https://aoctrl.com/siemens/5SY6304-8CC","factsUrl":"https://aoctrl.com/api/mcp/products/5SY6304-8CC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY6304-8CC, miniature circuit breaker, 3-pole, D characteristic, 4 A, 6 kA per EN 60898, 400 V AC, IP20.","salesMarkdown":"At 4 A, this breaker protects a 3-phase load drawing roughly 2.7 kW at 400 V AC (assuming a power factor around 0.8), so size it for the continuous load, not the peak inrush. For UL-listed panels, the same part carries 5 kA per UL 1077 and CSA C22.2 No.235 — the lower figure reflects the different test protocol, not a derating. The 3-pole design switches all three phases together with a single toggle, and the neutral is not switched (no 4-pole option on this frame). The housing is IP20 with conductors connected, so it belongs inside a sealed enclosure — not on the panel face. Three modular width units (54 mm) leave room for auxiliary contacts or shunt trips on the right side; the combined terminal design accepts both busbar and cable at top and bottom without extra adapters. Halogen-free and silicon-free construction, suitable for clean-room or food-processing environments where outgassing contaminates product or optics. Rated for ambient temperature from -40 °C to +75 °C, with humidity derating above 55 °C (95% RH at 55 °C, 55% at 70 °C, 35% at 75 °C). Vibration resistance per IEC 60068-2-6: ±1 mm at 5–25 Hz, 50 m/s² at 25–150 Hz.","metaTitle":"Siemens 5SY6304-8CC SENTRON MCB, 3-pole D-curve 4 A, 6 kA","metaDescription":"Siemens SENTRON 5SY6304-8CC miniature circuit breaker, 3-pole, D tripping characteristic, 4 A rated current, 6 kA breaking capacity per EN 60898. Active production, sourced to orde","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":"5SY6304-8CC","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 400 V 6kA, 3-pole, D, 4 A","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":"6 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,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/77283b97104196d282901dc3eb958fb9.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=210439&mlfb=5SY6304-8CC"},"ai":{"faq":[{"question":"Where can I buy 5SY6304-8CC and what is the lead time?","answer":"The part is sourced to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm delivery commitment."},{"question":"What is the closest functional second-source to 5SY6304-8CC?","answer":"The 5SY4304-7CV is a 3-pole D-curve 4 A MCB in the same SENTRON family, but it carries a 10 kA breaking capacity per EN 60898 versus the 6 kA rating of the 5SY6304-8CC. The 5SY4304-7CV also has a different housing width (2 modular units vs 3) and does not accept the same auxiliary accessories. For a direct drop-in replacement without rewiring, the 5SY6304-8CC is the correct part."},{"question":"Will 5SY6304-8CC drop into a panel specified around 5SY4304-7CV?","answer":"No — the 5SY6304-8CC is 3 modular units wide (54 mm) while the 5SY4304-7CV is 2 units wide (36 mm). The DIN-rail clip positions differ, and the busbar comb footprint is incompatible. Rewiring the busbar and possibly the enclosure gland plate is required."},{"question":"What compliance documentation does Siemens provide for 5SY6304-8CC?","answer":"The part carries CE marking per the Low Voltage Directive and is designed to EN 60898. It also holds UL 1077 and CSA C22.2 No.235 recognition at 5 kA. RoHS and REACH declarations are standard from Siemens for current-production SENTRON components."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY6304-8CC","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/5SY6304-8CC 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}}