{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SJ4345-8HG41","brand":"Siemens","brandSlug":"siemens","productSlug":"5SJ4345-8HG41","canonicalUrl":"https://aoctrl.com/siemens/5SJ4345-8HG41","factsUrl":"https://aoctrl.com/api/mcp/products/5SJ4345-8HG41","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SJ4 series, 3-pole miniature circuit breaker, D tripping characteristic, 10 kA per EN 60898, 400 V AC, 3-module wide.","salesMarkdown":"## Integrator's note on the D-curve and breaking capacity The Siemens 5SJ4345-8HG41 is a 3-pole SENTRON miniature circuit breaker with a D tripping characteristic, rated 400 V AC and breaking 10 kA per EN 60898 or 15 kA per IEC 60947-2. The 15 kA IEC 60947-2 rating gives headroom above the EN 60898 value; coordination studies should use the lower 10 kA figure for domestic-style distribution panels and the higher one for industrial switchgear where IEC 60947-2 applies. ## Panel fit and environmental ratings Snap-on mounting to standard DIN rail (35 mm per EN 60715) in any orientation. Occupies 3 width units (54 mm wide, 76 mm deep, 90 mm tall) with an installation depth of 70 mm. IP20 with conductors connected; IP40 in the handle area. Rated for ambient -40 to +75 °C, pollution degree 3, overvoltage category III. Vibration-resistant to 50 m/s² at 25–150 Hz and 60 m/s² at 35 Hz (4 s). Terminal torque spec: 3.5 Nm for Cu conductors rated 60/75 °C. The 5SJ4345-8HG41 carries a current lifecycle status.","metaTitle":"Siemens 5SJ4345-8HG41 SENTRON MCB, 3P, D-curve, 10kA","metaDescription":"Siemens SENTRON 5SJ4345-8HG41 miniature circuit breaker, 3-pole, D-tripping characteristic, 10 kA (EN 60898) / 15 kA (IEC 60947-2), 400 V AC. Current production, available to order","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"Depth":"76 mm","Width":"54 mm","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Rated Value":"50 Hz","Halogen-Free":"Yes","Silicon-Free":"Yes","Mounting Type":"on standard mounting rail","Number Of Poles":"3","Type Of Voltage":"AC/DC","lifecycle_stage":"current","Mounting Position":"any","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","Number Of Width Units":"3","Number Of Poles / Note":"3P","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","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)","operating current / at AC / rated value":"45 A","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":"$209.55","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/70359a7b342bec6b8ea2e9e4d339b07d.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=337455&mlfb=5SJ4345-8HG41","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SJ4345-8HG41/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SJ4345-8HG41?","answer":"10 kA per EN 60898 and 15 kA per IEC 60947-2, both at 400 V AC."},{"question":"What does the D tripping characteristic mean?","answer":"The D-curve trips magnetically at 10 to 20 times the rated current, making it suitable for loads with high inrush current like motors and transformers."},{"question":"How do I get pricing and availability for 5SJ4345-8HG41?","answer":"Submit an RFQ through this listing; availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SJ4345-8HG41","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/5SJ4345-8HG41 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}