{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SJ4320-8HG41","brand":"Siemens","brandSlug":"siemens","productSlug":"5SJ4320-8HG41","canonicalUrl":"https://aoctrl.com/siemens/5SJ4320-8HG41","factsUrl":"https://aoctrl.com/api/mcp/products/5SJ4320-8HG41","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SJ4320-8HG41 miniature circuit breaker, 3-pole, tripping characteristic D, 10 kA (EN 60898) / 15 kA (IEC 60947-2), 400 V AC / 60 V DC, 3 modular units wide, sealable, halogen-free, IP20 / IP40 handle.","salesMarkdown":"## Miniature Circuit Breaker for Motor and Transformer Circuits Siemens SENTRON 5SJ4320-8HG41 is a 3-pole D-curve miniature circuit breaker rated 10 kA and 15 kA breaking capacity, 400 V AC, 60 V DC. Sealable, halogen-free, silicon-free for confined panels. ## How the D-Curve Differs from the 5SY Series The 5SY4 series (e.g. 5SY4350-8) shares the same 3-module-wide footprint, 54 mm width, and DIN-rail mounting as the 5SJ4320-8HG41. The critical difference is the trip curve: the 5SJ carries a D-characteristic, which permits 10–20× rated current for brief inrush, while a comparable 5SY part may use B or C curve. If your panel was specified around a 5SY4350-8, confirm the required curve before drop-in substitution — the mechanical fit is identical, but the protection response is not. Installation depth is 70 mm; width is 3 modular units (54 mm). Sealable for positive lockout/tagout – important for maintenance isolation. IP20 with conductors connected, IP40 at the handle. Operating temperature range -40 to 75 °C, suitable for unheated enclosures. Terminal tightening torque specified at 3.5 Nm for Cu conductors.","metaTitle":"Siemens 5SJ4320-8HG41 SENTRON MCB, 3P D-curve, 10kA","metaDescription":"Siemens SENTRON 5SJ4320-8HG41 miniature circuit breaker, 3-pole, D-curve, 10 kA per EN 60898 / 15 kA IEC 60947-2, 400 V AC, 60 V DC, sealable, halogen-free, IP20. Active production","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["3-Pole MCB (DIN Rail)"],"specifications":{"Depth":"70 mm","Width":"54 mm","title":"5SJ4320-8HG41","Height":"110 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 240 V 14kA, 3-pole, D, 20 A, D=70 mm according to UL 489","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"3P","Number Of Poles":"3","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":"3","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":"2.4 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$297.85","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/b060d1b54b09e744f5c62542558600ee.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=269046&mlfb=5SJ4320-8HG41"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SJ4320-8HG41","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/5SJ4320-8HG41 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}}