{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SJ4340-7HG42","brand":"Siemens","brandSlug":"siemens","productSlug":"5SJ4340-7HG42","canonicalUrl":"https://aoctrl.com/siemens/5SJ4340-7HG42","factsUrl":"https://aoctrl.com/api/mcp/products/5SJ4340-7HG42","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SJ4340-7HG42, 3-pole miniature circuit breaker with C-trip characteristic, rated 10 kA (EN 60898) / 15 kA (IEC 60947-2) at 400 V AC.","salesMarkdown":"The 5SJ4340-7HG42: Rated for 400 V AC (also 60 V DC maximum), the breaker covers typical three-phase loads up to the specified breaking limits. The C-curve trips between 5x and 10x rated current, suited for moderate inrush from motors and transformers. ## Mounting and enclosure details Overall dimensions are 54 mm wide, 70 mm deep, and 121 mm high. Installation depth matches the 70 mm depth, so panel clearance is straightforward. Mounting position is any orientation. Combined terminals (screw/clamp) at both top and bottom; tunnel terminals not present. The breaker is sealable, halogen-free, and silicon-free, meeting clean-environment requirements for electronics or food processing. Rated for mechanical engineering/industry; vibration resistance 50 m/s² (25–150 Hz) and 60 m/s² at 35 Hz.","metaTitle":"Siemens 5SJ4340-7HG42 SENTRON MCB, 3P C-Curve 10kA","metaDescription":"Active 3-pole miniature circuit breaker, C-curve, 10 kA per EN 60898, 400 V AC. 54 mm wide, 70 mm deep. Sourced to order via RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"Depth":"70 mm","Width":"54 mm","Height":"121 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","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":"4.8 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$151.13 – $321.44","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/e053c383cabf6cc2e4ce07849924a160.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=265312&mlfb=5SJ4340-7HG42","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SJ4340-7HG42/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SJ4340-7HG42","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/5SJ4340-7HG42 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}}