{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SJ4304-7HG42","brand":"Siemens","brandSlug":"siemens","productSlug":"5SJ4304-7HG42","canonicalUrl":"https://aoctrl.com/siemens/5SJ4304-7HG42","factsUrl":"https://aoctrl.com/api/mcp/products/5SJ4304-7HG42","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SJ4304-7HG42, miniature circuit breaker, 3-pole, C-curve, 10 kA (EN 60898) / 15 kA (IEC 60947-2), 400 V AC, 60 V DC, 3 MW units, DIN rail mount.","salesMarkdown":"Rated 400 V AC and 60 V DC, it delivers 10 kA breaking capacity per EN 60898 and 15 kA per IEC 60947-2. Terminal tightening torque is 3.5 Nm for Cu conductors. It avoids nuisance trips from brief inrush while still clearing hard faults. The 400 V AC rating suits three-phase line-to-line circuits; the 60 V DC rating covers control-voltage rails and battery-backed supplies. The 3-pole design switches all three phases simultaneously — no neutral pole. The breaker is sealable (padlockable handle) for lockout/tagout compliance. Halogen-free and silicon-free construction matters in clean-room or high-reliability environments where outgassing can contaminate optics or contacts. The 3-module-width footprint (54 mm) occupies three 18 mm slots. Depth of 70 mm leaves clearance for wiring behind the panel door. IP20 protection with conductors connected;","metaTitle":"Siemens 5SJ4304-7HG42 SENTRON MCB, 3P C-curve, 10 kA","metaDescription":"Siemens 5SJ4304-7HG42 SENTRON miniature circuit breaker, 3-pole, C-curve, 10 kA per EN 60898, 15 kA per IEC 60947-2, 400 V AC, 60 V DC. Active lifecycle, sourced to order.","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":"5SJ4304-7HG42","Height":"121 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Circuit breaker 10kA, 3-pole, C, 4 A according to UL 489-480Y/277V","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":"C","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":"$129.54","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/265f7bed2cfcbcfa38f0b4ba78a77cb8.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=386478&mlfb=5SJ4304-7HG42"},"ai":{"faq":[{"question":"What is 5SJ4304-7HG42's listed depth?","answer":"The depth is 70 mm, with an installation depth also listed as 70 mm."},{"question":"What is 5SJ4304-7HG42's listed width?","answer":"The width is 54 mm, corresponding to 3 modular width units (each 18 mm)."},{"question":"Will 5SJ4304-7HG42 drop into a panel specified around 5SY4304-7CV without rewiring?","answer":"Both are 3-pole C-curve MCBs on a 54 mm DIN-rail footprint, so the mechanical fit is the same. The 5SJ4304-7HG42 carries a 10 kA (EN 60898) / 15 kA (IEC 60947-2) rating, while the 5SY4304-7CV is a different series — verify the breaking capacity and terminal type match your panel schedule before swapping."},{"question":"What compliance documentation does Siemens provide for 5SJ4304-7HG42?","answer":"The part is halogen-free and silicon-free. It is rated for pollution degree 3 and overvoltage category 3. The manufacturer typically provides CE, RoHS, and REACH declarations; specific certificates (UL, CSA) should be confirmed at quote time."},{"question":"Where can I buy 5SJ4304-7HG42?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SJ4304-7HG42","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/5SJ4304-7HG42 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}}