{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL4214-8","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL4214-8","canonicalUrl":"https://aoctrl.com/siemens/5SL4214-8","factsUrl":"https://aoctrl.com/api/mcp/products/5SL4214-8","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SL4214-8, 2-pole miniature circuit breaker, D tripping characteristic, 0.3 A rated current, 10 kA breaking capacity, 400 V AC.","salesMarkdown":"## What this MCB does on a mill panel The Siemens SENTRON 5SL4214-8 is a 2-pole miniature circuit breaker with a D tripping characteristic, rated 0.3 A at 400 V AC. It breaks fault currents up to 10 kA per both EN 60898 and IEC 60947-2 — the same rating on both standards means no derating guesswork when the panel is specified to either code. The D curve (10–20× In magnetic trip) handles high inrush loads like small motor starters or transformer primaries without nuisance tripping, which matters when you are protecting a 0.3 A control transformer feeding a PLC rack in a corrosive environment. At 36 mm wide (2 modular units), it snaps onto a standard DIN rail and fits any enclosure that accepts SENTRON 5SL series breakers. Ambient range from -40 °C to +75 °C covers mill basements and outdoor MCCs; derate the 0.3 A rating above 40 °C per the listed values (0.28 A at 45 °C, 0.26 A at 55 °C). It is halogen-free and silicon-free, which reduces corrosion risk in humid or chemically aggressive environments — a real consideration on a paper machine wet end or a chemical dosing skid.","metaTitle":"Siemens SENTRON 5SL4214-8 MCB, 2-Pole D 0.3 A, 10 kA","metaDescription":"Siemens SENTRON 5SL4214-8 miniature circuit breaker, 2-pole, D-curve, 0.3 A, 10 kA breaking capacity per EN 60898 & IEC 60947-2, 400 V AC. Active production, sourced to order. Requ","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["2-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"36 mm","title":"5SL4214-8","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 400 V 10kA, 2-pole, D, 0.3A","Halogen-Free":"Yes","Silicon-Free":"Yes","Number Of Poles":"2","Type Of Voltage":"AC","lifecycle_stage":"current","Mounting Position":"any","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"2","Product Designation":"Miniature circuit breaker","acc. to IEC 81346-2":"F","at AC / rated value":"0.3 A","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Number Of Poles / Note":"2P","acc. to DIN EN 61346-2":"F","Energy Limitation Class":"3","at 30 °C / rated value":"0.3 A","at 40 °C / rated value":"0.28 A","at 45 °C / rated value":"0.28 A","at 55 °C / rated value":"0.26 A","Suitability For Operation":"Residential buildings/infrastructure","Number Of Modular Width Units":"2","Tripping Characteristic Class":"D","at DC / rated value / maximum":"72 V","acc. to EN 60898 / rated value":"10 kA","acc. to IEC 60947-2 / rated value":"10 kA","Product Feature / Touch Protection":"Yes","supply voltage / at AC / rated value":"400 V","Influence Of The Surrounding Temperature":"+55 °C, max. 95% humidity","with multi-phase operation / at AC / maximum":"440 V","Product Function / Neutral Conductor Switching":"No","with multi-phase operation / at AC / rated value":"440 V","Mechanical Service Life (Operating Cycles) / Typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/f4ab5c3772864a9cd57ddebfe9666c12.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=421582&mlfb=5SL4214-8"},"ai":{"faq":[{"question":"Where can I buy 5SL4214-8 and how do I get a price?","answer":"The 5SL4214-8 is sourced and quoted to order against an RFQ through independent distribution. Submit a request for quote to confirm availability and current pricing."},{"question":"What is the D tripping characteristic on this breaker?","answer":"The D curve trips magnetically at 10–20 times the rated current (0.3 A), so it clears short-circuits quickly while tolerating the inrush of small motors and transformers without nuisance tripping."},{"question":"What is the breaking capacity of 5SL4214-8?","answer":"It is rated 10 kA per both EN 60898 and IEC 60947-2 at 400 V AC — the same figure on both standards, so no coordination ambiguity."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL4214-8","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/5SL4214-8 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}}