{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SJ4140-7HG42","brand":"Siemens","brandSlug":"siemens","productSlug":"5SJ4140-7HG42","canonicalUrl":"https://aoctrl.com/siemens/5SJ4140-7HG42","factsUrl":"https://aoctrl.com/api/mcp/products/5SJ4140-7HG42","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SJ4 miniature circuit breaker, 1-pole, C-curve, 10 kA (EN 60898) / 15 kA (IEC 60947-2), 400 V AC, 60 V DC.","salesMarkdown":"It carries a C tripping characteristic, meaning it tolerates moderate inrush currents typical of motor starters and small transformers before opening on overload. Rated breaking capacity is 10 kA per EN 60898 and 15 kA per IEC 60947-2 at 400 V AC — enough for most secondary distribution panels where the upstream transformer limits fault current below those levels. The DC rating stops at 60 V, so it is not a candidate for higher-voltage DC bus protection. Depth of 70 mm and height of 121 mm fit standard 1-pole MCB cutouts. No tunnel terminals are offered, so the combined style is the only termination option. IP20 with connected conductors, IP40 in the handle area — sufficient for enclosed panel use.","metaTitle":"Siemens 5SJ4140-7HG42 SENTRON MCB, 1P C-curve 10kA","metaDescription":"Siemens 5SJ4140-7HG42 SENTRON miniature circuit breaker, 1-pole, C characteristic, 10 kA per EN 60898, 15 kA per IEC 60947-2. Active production. IP20 rated.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Depth":"70 mm","Width":"18 mm","Height":"121 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":"on standard mounting rail","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 breakers","protection class IP":"IP20, with connected conductors, IP 40 in the handle range","Overvoltage Category":"3","Tunnel Terminals Top":"No","Vibration Resistance":"50 m/s² at 25 to 150Hz and 60m/s² at 35Hz (4sec)","Combined Terminal Top":"Yes","Design Of The Product":"Miniature circuit-breaker 5SJ4","Product Function Note":"Terminal tightening torque for Cu, 60/75°C; 3.5Nm/31lb.in","Tunnel Terminals Bottom":"No","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","at DC rated value maximum":"60 V","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","Ambient Temperature During Operation":"max. 95% humidity","Supply Voltage Frequency Rated Value":"50 Hz","according to IEC 60947-2 rated value":"15 kA","installation environment regarding EMC":"Suitable for environment B (immunity to interference not applicable)","insulation voltage (Ui) at AC rated value":"440 V","Value Range Of The Supply Voltage Frequency":"50/60 Hz","vibration resistance according to IEC 60068-2-6":"±1 mm at 5 to 25 Hz; 50 m/s² at 25 to 150 Hz","Mechanical Service Life (Operating Cycles) Typical":"10 000","Product Extension Installable Supplementary Devices":"Yes","Tightening Torque With Screw-Type Terminals Maximum":"3.5 N·m","power loss [W] for rated value of the current at AC in hot operating state per pole":"4.8 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$101.76","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/678b2c8b2a92ecc784eda2e766280d79.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=119627&mlfb=5SJ4140-7HG42","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SJ4140-7HG42/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of this MCB?","answer":"Rated 10 kA per EN 60898 and 15 kA per IEC 60947-2 at 400 V AC. The higher IEC rating applies when the breaker is used in industrial applications per that standard."},{"question":"What are the overall dimensions?","answer":"Width 18 mm (1 modular unit), height 121 mm, depth 70 mm. It snaps onto standard 35 mm DIN rail."},{"question":"Can this MCB be used for DC circuits?","answer":"Yes, but only up to 60 V DC. For higher DC voltages, a different breaker rated for that range would be needed."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SJ4140-7HG42","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/5SJ4140-7HG42 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}}