{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4145-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4145-7","canonicalUrl":"https://aoctrl.com/siemens/5SY4145-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4145-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON miniature circuit breaker, 5SY4145-7, 1-pole, C-curve, 10 kA per EN 60898 / 15 kA per IEC 60947-2, 400 VAC / 60 VDC, 18 mm width, IP20.","salesMarkdown":"It carries a 10 kA interrupting rating per EN 60898 and a 15 kA rating per IEC 60947-2, with a 5 kA rating under UL 1077. Rated operational voltage is 400 VAC (440 VAC multi- or single-phase) and 60 VDC (max 72 VDC). The 18 mm width takes one modular unit on a DIN rail, and the unit is sealable with a quick-assembly fastening system. The 10 kA (EN 60898) and 15 kA (IEC 60947-2) ratings define the maximum prospective short-circuit current the breaker can safely interrupt; the lower UL 1077 figure (5 kA) applies in North American supplementary protection applications. The 400 VAC / 60 VDC voltage ratings cover most three-phase and DC control circuits. The 18 mm width (one modular unit) is the standard DIN-rail footprint for a 1-pole MCB — critical when filling a crowded panel. ## Mounting and integration notes The quick-assembly fastening system allows snap-on installation without tools. The neutral conductor is not switched (1-pole design). The installation depth is 70 mm, and the overall depth is 76 mm — allow clearance for wiring and enclosure door. The unit occupies one modular width unit (18 mm).","metaTitle":"Siemens SENTRON 5SY4145-7 Miniature Circuit Breaker, C-Curve","metaDescription":"Siemens SENTRON 5SY4145-7 1-pole MCB, C-curve, 10 kA (EN 60898) / 15 kA (IEC 60947-2), 400 VAC, 60 VDC, 18 mm wide, IP20, halogen-free. Current production.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"18 mm","title":"5SY4145-7","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Standard":"IEC / EN 60898-1, IEC / EN 60947-2 / UL1077","description":"Miniature circuit breaker 230/400 V 10kA, 1-pole, C, 45 A, D=70 mm","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"1P","Number Of Poles":"1","lifecycle_stage":"current","Fastening Method":"Quick assembly system","Mounting Position":"any","at AC rated value":"400 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","Energy Limitation Class":"3","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Neutral Conductor Switching":"No","Number Of Modular Width Units":"1","Position Of Power Supply Cord":"Any","Tripping Characteristic Class":"C","according to EN 60898 rated value":"10 kA","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","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 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","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":"3.1 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$114.73","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/0d35b1033ebc3d995ab0ac0927badfb9.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=412361&mlfb=5SY4145-7"},"ai":{"faq":[{"question":"What is the closest functional second-source — 5SL4363-7?","answer":"The 5SL4363-7 is a different SENTRON variant with a different tripping characteristic or rating. The 5SY4145-7 is a C-curve 1-pole unit; the 5SL series typically uses a different characteristic. They share the same 18 mm width and DIN-rail mounting, but verify the specific rating and curve before substituting. The 5SY4145-7 is the part specified here."},{"question":"What is 5SY4145-7's listed depth?","answer":"The overall depth is 76 mm; the installation depth (behind the panel face) is 70 mm."},{"question":"What is 5SY4145-7's listed width?","answer":"The width is 18 mm, which is one modular unit on a standard DIN rail."},{"question":"Will 5SY4145-7 drop into a panel specified around 5SL4363-7 without rewiring?","answer":"Both are 18 mm wide 1-pole DIN-rail units, so physical fit is the same. However, the tripping characteristic and interrupting ratings may differ — the 5SY4145-7 is a C-curve with 10/15 kA ratings. Verify the existing panel's short-circuit rating and load type before swapping. No rewiring should be needed if the terminal arrangement matches."},{"question":"What compliance documentation does this brand provide for 5SY4145-7?","answer":"The part is certified to IEC / EN 60898-1, IEC / EN 60947-2, and UL 1077. It is halogen-free and silicon-free. Standard compliance documentation (declaration of conformity, RoHS, REACH) is available from Siemens upon request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4145-7","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/5SY4145-7 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}}