{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SJ4120-7HG41","brand":"Siemens","brandSlug":"siemens","productSlug":"5SJ4120-7HG41","canonicalUrl":"https://aoctrl.com/siemens/5SJ4120-7HG41","factsUrl":"https://aoctrl.com/api/mcp/products/5SJ4120-7HG41","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SJ4120-7HG41, 1-pole miniature circuit breaker, C characteristic, 10 kA (EN 60898) / 15 kA (IEC 60947-2), 18 mm width, DIN rail mount.","salesMarkdown":"Its 10 kA breaking capacity per EN 60898 covers most commercial and light-industrial fault levels; the 15 kA rating per IEC 60947-2 gives headroom for higher-fault installations where the utility transformer is close or the panel SCCR demands it. Rated at 400 V AC and 60 V DC, it handles single-phase loads up to the C-curve's magnetic trip threshold (5–10× In) — typical for motor starters, lighting circuits, and general-purpose branch protection where moderate inrush is expected. ## Sourcing, lifecycle, and compliance The part carries IP20 protection with connected conductors (IP40 in the handle area), is halogen-free and silicon-free, and is rated for ambient temperatures from -40 °C to 75 °C — suitable for unheated enclosures and outdoor-adjacent installations. Compliance documentation (RoHS, REACH, manufacturer declarations) is available upon request as part of the RFQ package — the brand supports full material and regulatory disclosure for OEM and panel-builder traceability.","metaTitle":"Siemens 5SJ4120-7HG41 SENTRON MCB, 1P, C-curve, 10kA/15kA","metaDescription":"Siemens SENTRON 5SJ4120-7HG41 miniature circuit breaker. 1-pole, C characteristic, 10 kA per EN 60898 / 15 kA per IEC 60947-2. 18 mm wide, DIN rail mount. Active production. Quoted","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","title":"5SJ4120-7HG41","Height":"110 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 240 V 14kA, 1-pole, C, 20 A, D=70 mm according to UL 489","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":"2.4 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$30.48","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/314b501fd5fef4e94fdeefe8692cbe5c.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=127650&mlfb=5SJ4120-7HG41"},"ai":{"faq":[{"question":"What is the breaking capacity of the 5SJ4120-7HG41?","answer":"10 kA per EN 60898 and 15 kA per IEC 60947-2. The higher IEC rating gives fault-current headroom for installations with higher available short-circuit current."},{"question":"Will 5SJ4120-7HG41 drop into a panel specified around 5SY4116-7CV?","answer":"Both are 1-pole, 18 mm wide DIN-rail MCBs with C characteristic, so the 5SJ4120-7HG41 fits the same physical footprint and rail slot. Verify the rated current matches your branch-circuit load before swapping."},{"question":"Where can I buy the 5SJ4120-7HG41?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm commercial response."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SJ4120-7HG41","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/5SJ4120-7HG41 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}}