{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY7450-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY7450-7","canonicalUrl":"https://aoctrl.com/siemens/5SY7450-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SY7450-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY7450-7 miniature circuit breaker, 4-pole, C tripping characteristic, 15 kA (EN 60898) / 20 kA (IEC 60947-2), 400 V AC, 72 mm wide.","salesMarkdown":"## What it is and what it does The Siemens 5SY7450-7 is a 4-pole miniature circuit breaker (MCB) from the SENTRON series, designed for branch-circuit overcurrent and short-circuit protection in industrial control panels. It carries the C tripping characteristic, so it handles moderate inrush from motor starters and transformer primaries without nuisance tripping — the magnetic trip kicks in at 5 to 10 times rated current. Rated breaking capacity depends on which standard you're working to: 15 kA per IEC/EN 60898-1, 20 kA per IEC 60947-2, and 5 kA per UL 1077 / CSA C22.2 No.235. That dual rating means the same part satisfies both IEC and North American panel builds — useful when a machine ships globally or the BOM crosses standards. ## Ratings that matter for the panel It's rated 400 V AC for multi-phase operation, 440 V AC for single-phase, and 60 V DC (72 V DC max). The 4-pole design switches all three phases plus neutral, though neutral conductor switching is not included — the neutral pole is a switched pole only if wired accordingly. Pollution degree 3 and overvoltage category III suit it for fixed industrial installations where conductive dust or humidity is present. The 72 mm width (4 modular units) snaps onto a DIN rail via the quick assembly system; mounting position is any, so vertical or horizontal panel layouts work. Depth is 76 mm with 70 mm installation depth behind the panel — enough to clear most backpanel wiring troughs. ## Where it goes This MCB is suited for mechanical engineering and industrial environments — think control cabinets on conveyor systems, pump skids, or packaging lines where a 4-pole C-curve breaker protects a mixed resistive-inductive load. The IP20 rating (with connected conductors) is standard for enclosed panel mounting; keep it behind a cabinet door or cover. Temperature range from -40 °C to 75 °C covers most plant-floor conditions, including unheated warehouses and near-oven zones. The sealable design allows the panel builder to lock the handle position with a padlock — useful for lockout/tagout procedures during maintenance.","metaTitle":"Siemens 5SY7450-7 SENTRON MCB, 4P, C-Curve, 15kA/20kA","metaDescription":"Siemens 5SY7450-7 SENTRON miniature circuit breaker, 4-pole, C characteristic, 15 kA (EN 60898) / 20 kA (IEC 60947-2). Active production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"Depth":"76 mm","Width":"72 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":"4P","Number Of Poles":"4","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":"4","Position Of Power Supply Cord":"Any","Tripping Characteristic Class":"C","according to EN 60898 rated value":"15 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 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":"3.8 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=375721&mlfb=5SY7450-7","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY7450-7/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 5SY7450-7?","answer":"This part is sourced and quoted to order through independent industrial distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."},{"question":"Will 5SY7450-7 drop into a panel that was specified around 5SY4140-7 without rewiring?","answer":"Both are 4-pole SENTRON MCBs with the same 72 mm width and DIN-rail mounting, so the mechanical fit is identical. The 5SY7450-7 carries a higher breaking capacity (15/20 kA vs the 5SY4140-7's lower rating), so it can replace a lower-rated unit without panel rework — just verify the upstream fault current doesn't exceed the new breaker's rating."},{"question":"What compliance documentation does this brand provide for 5SY7450-7?","answer":"The part is certified to IEC/EN 60898-1, IEC/EN 60947-2, and UL 1077 / CSA C22.2 No.235. It is halogen-free and silicon-free, which matters for sensitive environments like medical or semiconductor clean rooms. Standard RoHS and REACH declarations are available from Siemens."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY7450-7","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/5SY7450-7 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}}