{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4508-5","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4508-5","canonicalUrl":"https://aoctrl.com/siemens/5SY4508-5","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4508-5","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY4508-5 miniature circuit breaker, 1P+N, 2-module, characteristic A, 10 kA (IEC 60898-1) / 20 kA (IEC 60947-2), 230 VAC, 60 VDC.","salesMarkdown":"## Siemens 5SY4508-5 — SENTRON MCB for panel builders and spares buyers It carries characteristic A — the fast-trip curve that opens within a few cycles on moderate overloads, suited for protecting semiconductor circuits, control transformers, or sensitive loads where a B-curve would let too much energy through before tripping. Rated breaking capacity is 10 kA per IEC 60898-1 and 20 kA per IEC 60947-2 at 230 VAC, with a DC rating of 15 kA at 60 V per IEC 60947-2. Under UL 1077 it carries 5 kA — enough for most North American supplementary-protection applications. Lifecycle status is current production, so this is a straightforward BOM-line fill — no last-time-buy scramble. Characteristic A trips at 2–3× rated current — faster than the more common B (3–5×) or C (5–10×) curves. That matters when the load is a rectifier input, a UPS bypass, or a control-circuit supply where a short spike from a transformer inrush could nuisance-trip a slower breaker. The 10 kA SCCR at 230 VAC (IEC 60898-1) means it safely interrupts faults up to that level without cascading upstream; the 20 kA rating under IEC 60947-2 gives additional headroom for industrial panel designs that spec to the higher standard. The 1P+N design (two poles, one protected phase plus switched neutral) is common in single-phase final subcircuits where the neutral must be disconnected for isolation. Neutral conductor switching is confirmed, so the breaker opens both poles simultaneously. Ambient temperature range is -40 to 75 °C, with humidity derating above 55 °C: max 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 — enough for machine-mounted panels but not for direct engine mounting without additional damping. Certified to IEC/EN 60898-1 (domestic-style MCB) and IEC/EN 60947-2 (industrial MCCB standard), plus UL 1077 for North American supplementary protection. CSA C22.2 No.235 also listed. The dual-standard rating means the same part can be specified for panels destined for both IEC and UL markets, simplifying BOM consolidation. The manufacturer provides the standard declaration of conformity, CE marking, and the full IEC/UL test reports. RoHS and REACH compliance documentation is available on request through the supply channel.","metaTitle":"Siemens 5SY4508-5 SENTRON MCB, 1P+N, 10kA, Char A, 230VAC","metaDescription":"Siemens 5SY4508-5 SENTRON miniature circuit breaker, 1P+N, 10 kA per IEC 60898-1, 20 kA per IEC 60947-2, characteristic A. Current production, sourced to order. Request a quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"36 mm","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Standard":"IEC / EN 60898-1, IEC / EN 60947-2 / UL1077","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"1P+N","Number Of Poles":"2","lifecycle_stage":"current","Fastening Method":"Quick assembly system","Mounting Position":"any","at AC rated value":"230 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":"Yes","Number Of Modular Width Units":"2","Position Of Power Supply Cord":"Any","Tripping Characteristic Class":"A","according to EN 60898 rated value":"10 kA","according to IEC 60947-2 rated value":"20 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 single-phase operation at AC rated value":"250 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":"1.9 W"}},"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=164979&mlfb=5SY4508-5","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY4508-5/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 5SY4508-5 and get a price?","answer":"Sourced and quoted to order through independent distribution. Submit an RFQ for current availability and pricing — confirmed at quote time."},{"question":"Will 5SY4508-5 drop into a panel specified around 5SY4116-7CV?","answer":"Both are 2-module (36 mm wide) SENTRON MCBs with the same DIN-rail footprint and 76 mm depth, so mechanical fit is identical. The deciding factor is the tripping characteristic: 5SY4508-5 is characteristic A (fast), while 5SY4116-7CV is characteristic C (industrial motor/lighting). Rewiring is not needed, but the protective curve must match the load — verify the circuit's inrush profile before swapping."},{"question":"What compliance documentation does Siemens provide for 5SY4508-5?","answer":"The part carries IEC/EN 60898-1, IEC/EN 60947-2, UL 1077, and CSA C22.2 No.235 certifications. Standard CE declaration of conformity, RoHS, and REACH documentation are available through the supply channel."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4508-5","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/5SY4508-5 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}}