{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4135-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4135-7","canonicalUrl":"https://aoctrl.com/siemens/5SY4135-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4135-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY4135-7, 1-pole miniature circuit breaker, C-curve, 35 A rated, 10 kA (EN 60898) / 15 kA (IEC 60947-2) breaking capacity, 18 mm width.","salesMarkdown":"## What the ratings mean for fit The Siemens 5SY4135-7 is a SENTRON 1-pole miniature circuit breaker with a C tripping characteristic and a 35 A rated current at 35 °C ambient. The C-curve means it trips between 5 and 10 times rated current — designed for inductive loads like motor starters and small transformers where inrush is higher than a resistive load. The 10 kA breaking capacity per EN 60898 covers standard domestic/commercial fault levels; the 15 kA per IEC 60947-2 extends its use to industrial panels where higher prospective short-circuit currents are expected. The DC rating of 15 kA per IEC 60947-2 also applies, so it handles DC side protection in rectified supplies or battery circuits. ## Derating and ambient conditions At 40 °C the 35 A rating derates to 33.32 A; at 50 °C it drops to 31.57 A; at 60 °C to 29.68 A. If the panel runs warm — say inside a non-ventilated enclosure near other heat sources — use the 40 °C or 50 °C column for sizing. The breaker is rated for pollution degree 3 (conductive pollution or dry non-conductive that becomes conductive through condensation) and overvoltage category III, which is the standard for fixed installations downstream of the main distribution board. Operating temperature range is -40 °C to 75 °C, so it works in unheated warehouses or outdoor cabinets as well as warm machine enclosures. ## Mechanical fit and panel integration At 18 mm width (one modular unit), the 5SY4135-7 snaps onto a standard DIN rail via the quick assembly system. Mounting position is any — horizontal, vertical, upside-down — no derating needed for orientation. Depth is 76 mm, installation depth 70 mm, so it clears most standard enclosures. The combined top and bottom terminals accept wiring from either direction, and the breaker is sealable for applications requiring tamper-evident locking. Touch protection is built in (IP20 with connected conductors). Halogen-free and silicon-free construction matters for environments sensitive to outgassing — clean rooms, semiconductor fabs, or food processing lines.","metaTitle":"Siemens 5SY4135-7 SENTRON MCB, 1P C-35A, 10kA/15kA","metaDescription":"Siemens 5SY4135-7 SENTRON miniature circuit breaker, 1-pole, C-curve, 35 A rated. Breaking capacity 10 kA (EN 60898) / 15 kA (IEC 60947-2). Current lifecycle stage. Sourced to orde","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","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","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":"35 A","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","acc. to DIN EN 61346-2":"F","Energy Limitation Class":"3","at 35 °C / rated value":"35 A","at 40 °C / rated value":"33.32 A","at 45 °C / rated value":"32.44 A","at 50 °C / rated value":"31.57 A","at 55 °C / rated value":"30.62 A","at 60 °C / rated value":"29.68 A","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Number Of Modular Width Units":"1","Tripping Characteristic Class":"C","acc. to EN 60898 / rated value":"10 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":"$66.95","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/20b288bbc4a20399e735a3b484ae6fff.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=396136&mlfb=5SY4135-7","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY4135-7/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SY4135-7?","answer":"10 kA per EN 60898 and 15 kA per IEC 60947-2 (both AC). The DC breaking capacity per IEC 60947-2 is also 15 kA."},{"question":"Will 5SY4135-7 drop into a panel specified for 5SY4140-7?","answer":"Yes — same physical footprint (18 mm width, 76 mm depth, 90 mm height), same mounting system, same SENTRON series. The only difference is the rated current: 35 A vs 40 A. No rewiring needed if the circuit load is within 35 A."},{"question":"Where can I buy 5SY4135-7?","answer":"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 5SY4135-7?","answer":"The part is halogen-free and silicon-free. It carries IP20 protection with connected conductors. Standard compliance documentation (CE, RoHS, REACH) is provided with the shipment; specific declarations are available on request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4135-7","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/5SY4135-7 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}}