{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SJ4218-8HG41","brand":"Siemens","brandSlug":"siemens","productSlug":"5SJ4218-8HG41","canonicalUrl":"https://aoctrl.com/siemens/5SJ4218-8HG41","factsUrl":"https://aoctrl.com/api/mcp/products/5SJ4218-8HG41","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SJ4 series, 5SJ4218-8HG41, 2-pole miniature circuit breaker, D characteristic, 10 kA interrupting capacity per EN 60898, 15 kA per IEC 60947-2.","salesMarkdown":"## Interrupting capacity and tripping curve for motor-starting loads The 5SJ4218-8HG41 is a 2-pole miniature circuit breaker from the Siemens SENTRON 5SJ4 series, specified with a D tripping characteristic. That curve allows a higher inrush multiple — typically 10–14× rated current — before the magnetic trip fires, which makes it the right choice for motor-starting, transformer, or other inductive loads where the start-up surge would nuisance-trip a B or C curve breaker. Rated interrupting capacity is 10 kA per EN 60898 and 15 kA per IEC 60947-2 at 400 V AC. The 15 kA figure under the industrial standard means this breaker can clear a fault up to that level without welding contacts or cascading failure upstream — important when coordinating with a larger main breaker in a panel. ## DIN-rail fit and environmental limits Snaps onto standard 35 mm DIN rail, occupying 2 modular width units (36 mm wide). The 70 mm depth leaves clearance for wiring in shallow enclosures. Mounting position is unrestricted. Ambient temperature range spans -40 °C to 75 °C, with a pollution degree 3 rating and overvoltage category III. The housing is halogen-free and silicon-free, and the breaker is sealable — a lead seal can be fitted through the handle to prevent tampering after commissioning.","metaTitle":"Siemens 5SJ4218-8HG41 2-Pole MCB, D-Curve, 10 kA","metaDescription":"Siemens SENTRON 5SJ4218-8HG41 2-pole miniature circuit breaker. D tripping characteristic, 10 kA (EN 60898) / 15 kA (IEC 60947-2) interrupting capacity.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["2-Pole MCB (DIN Rail)"],"specifications":{"Depth":"70 mm","Width":"36 mm","title":"5SJ4218-8HG41","Height":"110 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 240 V 14kA, 2-pole, D, 15 A, D=70 mm according to UL 489","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"2P","Number Of Poles":"2","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":"2","Position Of Power Supply Cord":"Any","Tripping Characteristic Class":"D","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":"1.8 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$232.63","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/98d98918eec7a86e9ab77db40f68af58.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=147173&mlfb=5SJ4218-8HG41"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SJ4218-8HG41","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/5SJ4218-8HG41 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}}