{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SJ4135-7HG42","brand":"Siemens","brandSlug":"siemens","productSlug":"5SJ4135-7HG42","canonicalUrl":"https://aoctrl.com/siemens/5SJ4135-7HG42","factsUrl":"https://aoctrl.com/api/mcp/products/5SJ4135-7HG42","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SJ4 miniature circuit breaker, 1-pole, C-curve, 35 A, 10 kA per EN 60898, 1 MW unit width.","salesMarkdown":"Rated 35 A at both 30 °C and 40 °C ambient, it derates to 30.8 A at 60 °C — a 12% drop that matters if the breaker lands in a hot cabinet next to drives or transformers. The 10 kA breaking capacity per EN 60898 is enough for most secondary distribution panels fed by a 100 kVA or smaller transformer; for higher fault current panels (e.g., near a 630 kVA unit), you'd step up to a 15 or 25 kA rated MCB. The part is sealable, halogen-free, and silicon-free — useful in food, pharma, or semiconductor fabs where outgassing or contamination risk is a concern. ## Physical fit and installation Dimensions: 18 mm wide, 121 mm tall, 70 mm deep. The 70 mm depth includes the body and the terminal area — it sits flush in a standard 70 mm deep distribution board. Protection class is IP20 with conductors connected, IP40 in the handle area — fine for enclosed panels, not for washdown zones without an enclosure. Vibration resistance is rated at 50 m/s² over 25–150 Hz and 60 m/s² at 35 Hz (4 sec) — sufficient for machine-mounted panels on pumps, conveyors, or compressors.","metaTitle":"Siemens SENTRON 5SJ4135-7HG42 MCB, 1P, C-35A, 10kA","metaDescription":"Siemens SENTRON 5SJ4135-7HG42 miniature circuit breaker, 1 pole, C-curve, 35 A rated, 10 kA breaking capacity per EN 60898. Current production. RFQ for pricing and lead time.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Depth":"70 mm","Width":"18 mm","title":"5SJ4135-7HG42","Height":"121 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Circuit breaker 10kA, 1-pole, C, 35A according to UL 489-277V","Halogen-Free":"Yes","Silicon-Free":"Yes","Number Of Poles":"1","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":"35 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","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":"35 A","at 40 °C / rated value":"35 A","at 45 °C / rated value":"34 A","at 50 °C / rated value":"32.9 A","at 55 °C / rated value":"31.8 A","at 60 °C / rated value":"30.8 A","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Number Of Modular Width Units":"1","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)","Type Of Voltage / Of The Operating Voltage":"AC/DC","insulation voltage (Ui) / at AC / rated value":"440 V","Product Component / Neutral Conductor Switching":"No","Mechanical Service Life (Switching Cycles) / Typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$100.64","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/619e2342ab87b68ee385a5d1574893c9.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=450002&mlfb=5SJ4135-7HG42"},"ai":{"faq":[{"question":"What is the breaking capacity of this MCB?","answer":"10 kA per EN 60898 at 230/400 V AC. This is the standard breaking capacity for a C-curve MCB in secondary distribution."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SJ4135-7HG42","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/5SJ4135-7HG42 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}}