{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SJ4305-7HG42","brand":"Siemens","brandSlug":"siemens","productSlug":"5SJ4305-7HG42","canonicalUrl":"https://aoctrl.com/siemens/5SJ4305-7HG42","factsUrl":"https://aoctrl.com/api/mcp/products/5SJ4305-7HG42","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SJ4305-7HG42, miniature circuit breaker, 3-pole (3P), tripping characteristic C, rated current 0.5 A, AC/DC voltage up to 60 V DC, 54 mm width.","salesMarkdown":"## 3-Pole C-Curve MCB for AC/DC Branch Protection The Siemens 5SJ4305-7HG42 is a 3-pole miniature circuit breaker from the SENTRON 5SJ4 series, featuring a C tripping characteristic and a rated current of 0.5 A at AC and DC voltages up to 60 V DC. This makes it suitable for protecting lighting, control transformers, and moderate inrush loads in industrial panels. The IP20 (connected conductors) and IP40 (handle range) protection class allows installation in enclosures with IP40 front panels. Terminals are combined top and bottom; tightening torque is 3.5 Nm for Cu conductors at 60/75 °C. The 5SJ4305-7HG42 is halogen-free and silicon-free, a standard spec for environments sensitive to outgassing. Suitable for mechanical engineering and general industry use.","metaTitle":"Siemens 5SJ4305-7HG42 MCB, 3-pole C 0.5 A, 54mm","metaDescription":"Siemens 5SJ4305-7HG42 SENTRON miniature circuit breaker, 3-pole C-curve, 0.5 A AC/DC, 54 mm wide, IP20/40. Active production. Sourced to order against RFQ.","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":"5SJ4305-7HG42","Height":"121 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Circuit breaker 10kA, 3-pole, C, 0.5 A according to UL 489-480Y/277V","Halogen-Free":"Yes","Silicon-Free":"Yes","Number Of Poles":"3","Type Of Voltage":"AC/DC","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","Number Of Poles / Note":"3P","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":"3","Tripping Characteristic Class":"C","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)","Influence Of The Surrounding Temperature":"max. 95% humidity","insulation voltage / at AC / rated value":"440 V","Product Function / Neutral Conductor Switching":"No","Mechanical Service Life (Operating Cycles) / Typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$318.99","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/e17cfe35ee0e7a4e010defbda103599d.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=279703&mlfb=5SJ4305-7HG42"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SJ4305-7HG42","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/5SJ4305-7HG42 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}}