{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SJ4145-8HG41","brand":"Siemens","brandSlug":"siemens","productSlug":"5SJ4145-8HG41","canonicalUrl":"https://aoctrl.com/siemens/5SJ4145-8HG41","factsUrl":"https://aoctrl.com/api/mcp/products/5SJ4145-8HG41","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SJ4 miniature circuit breaker, 1-pole, D tripping characteristic, 45 A rated current, 10 kA breaking capacity per EN 60898, 400 V AC, DIN-rail mount.","salesMarkdown":"The Siemens SENTRON 5SJ4145-8HG41 is a 1-pole miniature circuit breaker with a D tripping characteristic, rated 45 A at 400 V AC. The 10 kA breaking capacity per EN 60898 covers most commercial and light industrial panel fault levels; the 15 kA rating per IEC 60947-2 gives additional headroom for industrial distribution boards where the prospective short-circuit current is higher. Mounts on standard DIN rail, occupies one width unit (18 mm). Rated for ambient temperatures from -25 to +55 °C, storage from -40 to +75 °C. Protection class IP20 with connected conductors; Vibration resistance tested at 50 m/s² over 25–150 Hz and 60 m/s² at 35 Hz for 4 seconds, covering typical machine-mounted panel vibration. Sealable for lockout/tagout applications. Overvoltage category III, suitable for fixed-installation distribution boards. The product carries designations per DIN EN 61346-2 and DIN EN 81346-2 (function code F).","metaTitle":"Siemens 5SJ4145-8HG41 SENTRON MCB, 1P, D-45A, 10kA","metaDescription":"Siemens 5SJ4145-8HG41 SENTRON miniature circuit breaker, 1-pole, D-curve 45 A, 10 kA (EN 60898) / 15 kA (IEC 60947-2), 400 V AC, DIN rail. Active production, available to order.","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":"5SJ4145-8HG41","Height":"110 mm","Sealable":"Yes","Rated Value":"50 Hz","description":"Miniature circuit breaker 240 V 10kA, 1-pole, D, 45 A, D=70 mm according to UL 489","Halogen-Free":"Yes","Silicon-Free":"Yes","Mounting type":"on standard mounting rail","During Storage":"-40 ... +75 °C","Number of poles":"1","Type of voltage":"AC/DC","lifecycle_stage":"current","Mounting position":"any","Installation depth":"70 mm","Product brand name":"SENTRON","Ambient temperature":"-25 ... +55 °C","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","Number of width units":"1","Number of poles / Note":"1P","acc. to DIN EN 61346-2":"F","acc. to DIN EN 81346-2":"F","Product function / Note":"Terminal tightening torque for Cu, 60/75°C; 3.5Nm/31lb.in","Tunnel terminals bottom":"No","Combined Terminal Bottom":"Yes","circuit-breaker / Design":"5SJ4","Suitability for operation":"Mechanical engineering / industry","Current / at AC / rated value":"45 A","Tripping characteristic class":"D","at DC / rated value / maximum":"60 V","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","Supply voltage / at AC / rated value":"400 V","Installation environment regarding EMC":"Suitable for environment B (immunity to interference not applicable)","Influence of the surrounding temperature":"max. 95% humidity","Insulation voltage / at AC / rated value":"440 V","Vibration resistance / acc. to IEC 60068-2-6":"50 m/s² at 25 to 150Hz and 60m/s² at 35Hz (4sec)","Product function / neutral conductor switching":"No","Mechanical service life (switching cycles) / typical":"20 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/21837f9804ae3d1b64814266c8d470c3.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=412823&mlfb=5SJ4145-8HG41"},"ai":{"faq":[{"question":"Where can I buy 5SJ4145-8HG41?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What is the breaking capacity of 5SJ4145-8HG41?","answer":"10 kA rated breaking capacity per EN 60898, and 15 kA per IEC 60947-2 at 400 V AC."},{"question":"What is the difference between 5SJ4145-8HG41 and 5SY7140-8CC?","answer":"The 5SY7140-8CC is a 1-pole C-curve 40 A MCB in the same SENTRON 5SY series. The D-curve on the 5SJ4145-8HG41 (10–20× In magnetic trip) suits motor and transformer loads, while the C-curve (5–10× In) suits general distribution. Both mount on standard DIN rail in the same 18 mm footprint, so a panel swap between them is mechanically straightforward, but the 5SJ4145-8HG41 carries a higher 45 A rating versus 40 A."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SJ4145-8HG41","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/5SJ4145-8HG41 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}}