{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SJ4105-8HG40","brand":"Siemens","brandSlug":"siemens","productSlug":"5SJ4105-8HG40","canonicalUrl":"https://aoctrl.com/siemens/5SJ4105-8HG40","factsUrl":"https://aoctrl.com/api/mcp/products/5SJ4105-8HG40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SJ4 series, 1-pole miniature circuit breaker, D tripping characteristic, 0.5 A rated current, 10 kA breaking capacity per EN 60898, 18 mm width, 70 mm depth.","salesMarkdown":"## What this MCB does and where it fits The Siemens SENTRON 5SJ4105-8HG40 is a 1-pole miniature circuit breaker with a D tripping characteristic, rated 0.5 A at AC and 10 kA breaking capacity per EN 60898. The 70 mm installation depth matches the common SENTRON 5SJ4 footprint, so it retrofits into existing distribution boards without re-spacing the busbar. The 0.5 A rating holds at 30 °C and 40 °C ambient, but above that you need to derate: 0.48 A at 45 °C, 0.46 A at 50 °C, 0.44 A at 55 °C, and 0.42 A at 60 °C. The terminal torque spec is 3.5 Nm for Cu conductors rated 60/75 °C, which is a standard value for this class. ## Environmental and compliance fit Halogen-free and silicon-free construction, which matters for panels in clean-room or semiconductor-adjacent environments where outgassing can contaminate optics or contacts. The IP20 rating on the body (IP40 in the handle area) is typical for enclosed distribution boards — no washdown rating, so keep it behind a panel door in wet areas.","metaTitle":"Siemens 5SJ4105-8HG40 SENTRON MCB, 1P D 0.5A 10kA","metaDescription":"Siemens SENTRON 5SJ4105-8HG40 miniature circuit breaker, 1-pole, D-curve, 0.5 A, 10 kA per EN 60898. Current lifecycle. Sourced to order. Request a quote.","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":"5SJ4105-8HG40","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 240 V 14kA, 1-pole, D, 0.5A, D=70 mm according to UL 489, equal polarity","Halogen-Free":"Yes","Silicon-Free":"Yes","Number Of Poles":"1","lifecycle_stage":"current","Fastening Method":"on standard mounting rail","Mounting Position":"any","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"3","Product Designation":"Miniature circuit breakers","acc. to IEC 81346-2":"F","at AC / rated value":"0.5 A","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","acc. to DIN EN 61346-2":"F","Product Function / Note":"Terminal tightening torque for Cu, 60/75°C; 3.5Nm/31lb.in","Tunnel Terminals Bottom":"No","at 30 °C / rated value":"0.5 A","at 40 °C / rated value":"0.5 A","at 45 °C / rated value":"0.48 A","at 50 °C / rated value":"0.46 A","at 55 °C / rated value":"0.44 A","at 60 °C / rated value":"0.42 A","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Number Of Modular Width Units":"1","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)","insulation voltage (Ui) / at AC / rated value":"440 V","Product Component / Neutral Conductor Switching":"No","Mechanical Service Life (Switching Cycles) / Typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/07d5bf71b2b9b6833d7de681e9460d90.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=315985&mlfb=5SJ4105-8HG40"},"ai":{"faq":[{"question":"Where can I buy the 5SJ4105-8HG40 and get a price?","answer":"This part is sourced through independent distribution channels. Submit an RFQ — availability and current pricing are confirmed at quote time. No stock figures or price lists are published here."},{"question":"What is the breaking capacity of this MCB?","answer":"10 kA rated breaking capacity per EN 60898, which covers most residential and light commercial distribution boards. For higher fault-current installations (above 10 kA), you would need a current-limiting upstream device or a higher-rated breaker."},{"question":"What compliance documentation does Siemens provide for the 5SJ4105-8HG40?","answer":"The part carries IEC and EN certifications implicit in the 10 kA rating per EN 60898. It is halogen-free and silicon-free. Full declarations (CE, UKCA, RoHS, REACH) are available from Siemens documentation portals; the product designation follows IEC 81346-2 and DIN EN 61346-2 for panel labeling."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SJ4105-8HG40","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/5SJ4105-8HG40 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}}