{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY7150-8","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY7150-8","canonicalUrl":"https://aoctrl.com/siemens/5SY7150-8","factsUrl":"https://aoctrl.com/api/mcp/products/5SY7150-8","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY7 series, 1-pole miniature circuit breaker, D-characteristic, 50 A rated current, 15 kA breaking capacity per IEC/EN 60898, 18 mm width.","salesMarkdown":"## What this MCB is and what the ratings mean for fit The Siemens 5SY7150-8 is a 1-pole SENTRON miniature circuit breaker with a D tripping characteristic, rated 50 A at 35 °C and breaking 15 kA per IEC/EN 60898 and IEC 60947-2. The D-curve means it tolerates the high inrush of motor-starting or transformer loads — typically 10–20× rated current for a short magnetic trip delay — so it is sized for inductive circuits, not resistive lighting or general-purpose socket outlets. The 15 kA breaking capacity at 230/400 V AC covers most industrial panel fault levels; the same 15 kA rating holds for DC circuits per IEC 60947-2, which simplifies BOM consolidation if your line uses both AC and DC branch protection. Temperature derating is published per the spec table: 50 A at 35 °C, 46.35 A at 45 °C, 45.1 A at 50 °C, 43.75 A at 55 °C, and 42.4 A at 60 °C. If the panel ambient runs above 35 °C, the actual continuous current the breaker can carry without nuisance tripping is lower than the 50 A label — plan the load accordingly. ## Panel integration and mounting Snap-on mounting to DIN rail via the quick-assembly system, 18 mm width (1 modular unit), any mounting position. Installation depth is 70 mm; overall depth is 76 mm including the terminal arc. IP20 with connected conductors — protected against finger contact but not washdown, so it belongs inside a closed panel, not on a machine exterior. Pollution degree 3 and overvoltage category III suit it for fixed industrial installations where transient overvoltages are expected. Combined terminal at both top and bottom accepts copper conductors. Sealable design allows the panel builder to lock the toggle position after commissioning. Halogen-free and silicon-free construction matters for environments sensitive to outgassing — clean rooms, semiconductor fabs, or food processing zones where silicone contamination can affect downstream processes.","metaTitle":"Siemens 5SY7150-8 SENTRON MCB, 1P D-curve 50 A, 15 kA","metaDescription":"Siemens 5SY7150-8 SENTRON miniature circuit breaker, 1-pole, D-characteristic, 50 A rated current, 15 kA breaking capacity per IEC/EN 60898. Active production. Quoted to order.","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":"5SY7150-8","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 230/400 V 15kA, 1-pole, D, 50 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","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"3","Product Designation":"Miniature circuit breaker","acc. to IEC 81346-2":"F","at AC / rated value":"50 A","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","acc. to DIN EN 61346-2":"F","at 35 °C / rated value":"50 A","at 45 °C / rated value":"46.35 A","at 50 °C / rated value":"45.1 A","at 55 °C / rated value":"43.75 A","at 60 °C / rated value":"42.4 A","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Number Of Modular Width Units":"1","Tripping Characteristic Class":"D","acc. to EN 60898 / rated value":"15 kA","Position / Of Power Supply Cord":"Any","acc. to IEC 60947-2 / rated value":"15 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","Type Of Voltage / Of The Operating Voltage":"AC","at AC / acc. to UL 1077 and CSA C22.2 No.235":"5 kA","vibration resistance / acc. to IEC 60068-2-6":"±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz","Product Component / Neutral Conductor Switching":"No","with multi-phase operation / at AC / rated value":"440 V","operating voltage / at DC / rated value / maximum":"72 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,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/2e45332dc6df3f588d57af777fd29618.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=299435&mlfb=5SY7150-8"},"ai":{"faq":[{"question":"What is the breaking capacity of the 5SY7150-8?","answer":"15 kA per IEC/EN 60898 and IEC 60947-2 at AC, and 15 kA per IEC 60947-2 at DC. Under UL 1077 and CSA C22.2 No. 235 the rating is 5 kA."},{"question":"Will the 5SY7150-8 drop into a panel specified around the 5SY7140-8CC?","answer":"Yes — same SENTRON 5SY7 series, same 1-pole form factor, same 18 mm width and DIN-rail mounting. The only difference is the rated current: 50 A on the 5SY7150-8 versus 40 A on the 5SY7140-8CC. No rewiring or panel rework needed if the load current is within the 50 A rating."},{"question":"How do I get pricing and availability for the 5SY7150-8?","answer":"Submit an RFQ through this listing. The part is sourced to order through independent distribution; current pricing and stock position are confirmed at quote time."},{"question":"What compliance documentation does Siemens provide for the 5SY7150-8?","answer":"The part carries IEC/EN 60898 and IEC 60947-2 ratings, plus UL 1077 and CSA C22.2 No. 235 certifications for the North American market. Halogen-free and silicon-free construction is documented. RoHS and REACH declarations are standard with the SENTRON series."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY7150-8","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/5SY7150-8 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}}