{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY6604-8","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY6604-8","canonicalUrl":"https://aoctrl.com/siemens/5SY6604-8","factsUrl":"https://aoctrl.com/api/mcp/products/5SY6604-8","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY6 series miniature circuit breaker, order code 5SY6604-8, 4 A rated current, D tripping characteristic, 4-pole (3P+N), 400 V AC, 30 kA IEC 60947-2.","salesMarkdown":"The Siemens 5SY6604-8 is a SENTRON 5SY6 miniature circuit breaker rated 4 A with a D tripping characteristic, 4-pole (3P+N), for 400 V AC systems. The 4 A rating and D curve together suit it for small motor branch circuits or inductive loads where the starting surge exceeds the C-curve threshold. The 4-pole configuration with neutral switching (3P+N) means it disconnects all three phases and the neutral, which is required in some regional distribution schemes or for isolating a four-wire load. Rated 440 V AC for multi-phase operation, it covers standard 400/415 V three-phase networks. The 72 V DC maximum rating and 15 kA DC breaking capacity (IEC 60947-2) extend its use to DC control circuits or battery-backed supplies, though the primary application is AC branch protection. The 72 mm width (4 width units) occupies four 18 mm module spaces; the 76 mm depth and 70 mm installation depth leave clearance for wiring behind the panel door. Any mounting position is permitted, so orientation within the enclosure is flexible. Halogen-free and silicon-free construction reduces corrosive outgassing in sealed enclosures. Rated for ambient temperatures from -40 °C to 75 °C, with derating above 55 °C per the humidity curve (max 95% RH at 55 °C, tapering to 35% at 75 °C). Sealable to prevent tamper access. Touch protection is built in. Approvals include EN 60898 (6 kA), IEC 60947-2 (30 kA AC, 15 kA DC), and UL 1077 / CSA C22.2 No. 235 (5 kA AC) — covering European and North American installations.","metaTitle":"Siemens 5SY6604-8 SENTRON MCB, 4A D-curve, 4-pole, 30kA IEC","metaDescription":"Siemens 5SY6604-8 SENTRON miniature circuit breaker, 4 A, D tripping characteristic, 4-pole (3P+N), 30 kA IEC 60947-2, 400 V AC. Current lifecycle stage. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"Depth":"76 mm","Width":"72 mm","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Rated Value":"50/60 Hz","Halogen-Free":"Yes","Silicon-Free":"Yes","Mounting type":"Quick assembly system","Number of poles":"4","Type of voltage":"AC","lifecycle_stage":"current","Mounting position":"any","Installation depth":"70 mm","Product brand name":"SENTRON","Product designation":"Miniature circuit breaker","Protection class IP":"IP20, with connected conductors","at AC / rated value":"400 V","Overvoltage category":"III","Combined Terminal Top":"Yes","Number of width units":"4","Number of poles / Note":"3P+N","acc. to DIN EN 61346-2":"F","acc. to DIN EN 81346-2":"F","Combined Terminal Bottom":"Yes","circuit-breaker / Design":"5SY6","Suitability for operation":"Mechanical engineering / industry","Current / at AC / rated value":"4 A","Tripping characteristic class":"D","at DC / rated value / maximum":"72 V","acc. to EN 60898 / rated value":"6 kA","Position / of power supply cord":"Any","acc. to IEC 60947-2 / rated value":"30 kA","Product feature / Touch protection":"Yes","Influence of the surrounding temperature":"max. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C","at DC / acc. to IEC 60947-2 / rated value":"15 kA","at AC / acc. to UL 1077 and CSA C22.2 No.235":"5 kA","Product function / neutral conductor switching":"Yes","with multi-phase operation / at AC / rated value":"440 V","with single-phase operation / at AC / rated value":"440 V","Mechanical service life (switching cycles) / typical":"10 000"}},"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=315139&mlfb=5SY6604-8","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY6604-8/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 5SY6604-8 and how is it quoted?","answer":"It is sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time."},{"question":"What is the difference between 5SY6604-8 and 5SY4140-7?","answer":"The 5SY4140-7 is a 4-pole C-curve breaker at a different current rating; the 5SY6604-8 uses a D curve for higher inrush tolerance. Both share the same 4-pole (3P+N) format and 30 kA IEC breaking capacity, but the tripping characteristic and amp rating differ — verify the load's starting current before substituting."},{"question":"What compliance documentation does Siemens provide for 5SY6604-8?","answer":"The breaker carries approvals to EN 60898, IEC 60947-2, UL 1077, and CSA C22.2 No. 235. It is halogen-free and silicon-free, and the product designation follows DIN EN 61346-2 and DIN EN 81346-2."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY6604-8","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/5SY6604-8 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}}