{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4608-5","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4608-5","canonicalUrl":"https://aoctrl.com/siemens/5SY4608-5","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4608-5","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY4 series, miniature circuit breaker, 4-pole (3P+N), 8 A rated, tripping characteristic A, 10 kA (EN 60898) / 20 kA (IEC 60947-2), 400 V AC, IP20.","salesMarkdown":"## What this 4-pole 8 A MCB does for a panel The Siemens 5SY4608-5 is a 4-pole miniature circuit breaker from the SENTRON 5SY4 series, rated 8 A at 400 V AC with a tripping characteristic A. That characteristic A means it trips instantaneously at 2 to 3 times rated current — built for protecting semiconductor circuits or long cable runs where standard B or C curves would allow too much energy through before opening. The 4-pole (3P+N) configuration switches all three phases and the neutral, so it's the right fit for a three-phase subfeed where you want neutral protection and isolation in one unit. It snaps onto a DIN rail via the quick assembly system, occupies 4 width units (72 mm), and accepts solid or stranded conductors from 0.75 up to 35 mm² at both top and bottom combined terminals — enough cross-section for a 6 mm² feed and a 10 mm² loop-through if the panel layout needs it. ## Breaking capacity — which standard governs your install This breaker carries three interrupting ratings depending on the standard you're designing to: 10 kA per EN 60898 (the household / commercial standard), 20 kA per IEC 60947-2 (the industrial standard), and 5 kA per UL 1077 / CSA C22.2 No.235 for North American supplementary protection. That's enough headroom for most machine-level distribution boards fed from a transformer in the 100–200 kVA range. ## Mounting and wiring — what the panel builder needs Each terminal accepts solid or stranded copper from 0.75 mm² up to 35 mm², which covers everything from a 1.5 mm² control circuit to a 10 mm² feeder. The installation depth behind the panel is 70 mm (76 mm overall depth including the front of the housing). Sealable with a lead or wire seal if the application requires tamper-proofing. Ambient temperature range is -40 to +70 °C, with humidity derating above 55 °C — max 95% RH at 55 °C, dropping to 55% at 70 °C.","metaTitle":"Siemens 5SY4608-5 SENTRON MCB, 4P, 8A, Char A, 10kA","metaDescription":"Siemens 5SY4608-5 SENTRON miniature circuit breaker, 4-pole 3P+N, 8 A rated, tripping characteristic A, 10 kA per EN 60898, 20 kA per IEC 60947-2. Current production, available to","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["4-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Solid":"0.75 ... 35 mm²","Width":"72 mm","title":"5SY4608-5","Height":"90 mm","Sealable":"Yes","Stranded":"0.75 ... 35 mm²","Rated Value":"50/60 Hz","description":"Miniature circuit breaker 400 V 10kA, 3+N-pole, A, 8A, D=70 mm","Halogen-Free":"Yes","Silicon-Free":"Yes","Mounting type":"Quick assembly system","During Storage":"-40 ... +75 °C","Number of poles":"4","Type of voltage":"AC","lifecycle_stage":"current","Mounting position":"any","Installation depth":"70 mm","Product brand name":"SENTRON","Ambient temperature":"-40 ... +70 °C","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":"5SY4","Suitability for operation":"Mechanical engineering / industry","Current / at AC / rated value":"8 A","Tripping characteristic class":"A","at DC / rated value / maximum":"72 V","acc. to EN 60898 / rated value":"10 kA","Position / of power supply cord":"Any","acc. to IEC 60947-2 / rated value":"20 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","Tightening torque / with screw-type terminals":"2.5 ... 3.5 N·m","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","Tightening torque [lbf·in] / with screw-type terminals":"22 ... 31 lbf·in","AWG number / as coded connectable conductor cross section":"18 ... 4"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/468b6e3560879b4ad10ae36377b6a570.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=134283&mlfb=5SY4608-5"},"ai":{"faq":[{"question":"What is the interrupting rating of 5SY4608-5?","answer":"It is rated 10 kA per EN 60898, 20 kA per IEC 60947-2 at 400 V AC, and 5 kA per UL 1077 / CSA C22.2 No.235. For DC circuits, it is rated 15 kA per IEC 60947-2 at a maximum of 72 V DC."},{"question":"What conductor sizes does the 5SY4608-5 accept?","answer":"The combined top and bottom terminals accept solid or stranded copper conductors from 0.75 mm² up to 35 mm²."},{"question":"Where can I buy 5SY4608-5?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What compliance documentation is available for 5SY4608-5?","answer":"The breaker is designed to EN 60898 and IEC 60947-2, and carries a UL 1077 / CSA C22.2 No.235 rating for North America. The housing is halogen-free and silicon-free."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4608-5","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/5SY4608-5 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}}