{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SJ4114-8HG42","brand":"Siemens","brandSlug":"siemens","productSlug":"5SJ4114-8HG42","canonicalUrl":"https://aoctrl.com/siemens/5SJ4114-8HG42","factsUrl":"https://aoctrl.com/api/mcp/products/5SJ4114-8HG42","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SJ4114-8HG42 miniature circuit breaker, 1-pole, D tripping characteristic, 0.3 A rated current, 70 mm depth, IP20/IP40.","salesMarkdown":"The Siemens 5SJ4114-8HG42 is a SENTRON miniature circuit breaker (MCB) in the 5SJ4 design, a single-pole unit with a D tripping characteristic rated at 0.3 A at AC or DC (60 V max DC). At 0.3 A it suits very small loads: control transformers, solenoid valve banks, or indicator lamp circuits. Rated current holds at 0.3 A up to 40 °C ambient; above that it derates smoothly to 0.25 A at 60 °C — a detail worth noting if the breaker lives near a heat source in a sealed panel. ## Mounting and environment Depth is 70 mm, installation depth the same — no extra clearance behind the rail. Mounts in any position. IP20 with conductors connected; IP40 in the handle area. ## Construction and compliance notes Halogen-free and silicon-free construction — important for environments where outgassing could contaminate optics or sensitive contacts. Sealable, so a lockout/tagout hasp can be fitted per LOTO procedure. Terminals are combined (top and bottom) with a tightening torque of 3.5 Nm for copper conductors at 60/75 °C. Vibration resistance rated at 50 m/s² over 25–150 Hz and 60 m/s² at 35 Hz — solid for machinery-mounted panels.","metaTitle":"Siemens 5SJ4114-8HG42 SENTRON MCB, 1P D 0.3A, 70mm depth","metaDescription":"Siemens SENTRON 5SJ4114-8HG42 miniature circuit breaker, 1-pole D-curve 0.3 A, 70 mm depth, IP20/IP40, -40 to 75 °C. Current production. RFQ for pricing.","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":"5SJ4114-8HG42","Height":"121 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Circuit breaker 10kA, 1-pole, D, 0.3 A according to UL 489-277V","Halogen-Free":"Yes","Silicon-Free":"Yes","Number Of Poles":"1","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":"0.3 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":"1P","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":"0.3 A","at 40 °C / rated value":"0.3 A","at 45 °C / rated value":"0.29 A","at 50 °C / rated value":"0.28 A","at 55 °C / rated value":"0.26 A","at 60 °C / rated value":"0.25 A","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Number Of Modular Width Units":"1","Tripping Characteristic Class":"D","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":"$98.98","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/b926f2309c400aab1b21a8ed0fabc75e.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=109120&mlfb=5SJ4114-8HG42"},"ai":{"faq":[{"question":"Will it drop into a panel specified around 5SL4363-7 without rewiring?","answer":"Both are 1-pole SENTRON MCBs on DIN rail, so the mechanical footprint is identical. However, the 5SJ4114-8HG42 is a 0.3 A D-curve; the 5SL4363-7 is a different rating. Check the branch circuit's load and coordination study before swapping — the breaker's interrupting capacity and selectivity may differ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SJ4114-8HG42","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/5SJ4114-8HG42 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}}