{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SJ4304-8HG42","brand":"Siemens","brandSlug":"siemens","productSlug":"5SJ4304-8HG42","canonicalUrl":"https://aoctrl.com/siemens/5SJ4304-8HG42","factsUrl":"https://aoctrl.com/api/mcp/products/5SJ4304-8HG42","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SJ4304-8HG42, miniature circuit breaker, 3-pole, D characteristic, 50 Hz, 10 kA (EN 60898) / 15 kA (IEC 60947-2).","salesMarkdown":"## Part overview and key ratings The 5SJ4304-8HG42 is a 3-pole D-curve miniature circuit breaker for 50 Hz systems. Interrupting capacity is 10 kA and 15 kA. Rated operational voltage is 400 V AC, 60 V DC. The insulation voltage is 440 V AC. IP20 with conductors connected; IP40 in the handle area. The 5SJ4304-8HG42 is halogen-free and silicon-free, which is worth noting if your panel sees sensitive environments (food, chemical) where off-gassing or contamination is a concern. It can be sealed and is rated for vibration up to 50 m/s² across 25–150 Hz. Our ledger includes three peer MPNs from the 5SY line — 5SY4350-8, 5SY4363-8, 5SY4380-7. These are also 3-pole miniature circuit breakers, but they belong to Siemens’ Standard product family, not the SENTRON brand. The 5SJ4 series is explicitly designated for mechanical engineering and industry; the 5SY line is more general-purpose. Without confirmed specs for the 5SY parts (interrupting rating, trip curve, certification), we cannot say they are drop-in replacements. If your BOM was built around 5SY4350-8, verify the required interrupting capacity and characteristic before substituting the 5SJ4304-8HG42. The two series have different ordering trees and documentation scopes. Lifecycle status is current (active). No last-time-buy or phase-out notification is attached to this order code. It can be quoted to your required quantity and schedule through our normal supply chain — no broker hunt needed. Just tell us the quantity and target delivery window. ## Mounting and environmental notes No neutral conductor switching (this is a line-only breaker).","metaTitle":"Siemens 5SJ4304-8HG42 SENTRON MCB, D-curve 10kA, 3-pole","metaDescription":"Active Siemens 5SJ4304-8HG42 SENTRON miniature circuit breaker, 3-pole D-curve, 10kA (EN 60898) / 15kA (IEC 60947-2), 400V AC. 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":"5SJ4304-8HG42","Height":"121 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Circuit breaker 10kA, 3-pole, D, 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":"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":"1.6 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$323.53","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/fe97c24e5bbce8914b6424d3a81c32e5.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=324824&mlfb=5SJ4304-8HG42"},"ai":{"faq":[{"question":"What trip characteristic does the 5SJ4304-8HG42 have?","answer":"It is a D-curve breaker, designed to handle motor and transformer inrush without nuisance tripping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SJ4304-8HG42","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/5SJ4304-8HG42 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}}