{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL3420-7MB","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL3420-7MB","canonicalUrl":"https://aoctrl.com/siemens/5SL3420-7MB","factsUrl":"https://aoctrl.com/api/mcp/products/5SL3420-7MB","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SL3420-7MB miniature circuit breaker, 4-pole, C-trip characteristic, 20 A rated current, 4.5 kA breaking capacity per EN 60898, 5 kA per IEC 60947-2, 400 V AC.","salesMarkdown":"## Siemens 5SL3420-7MB SENTRON MCB — 4-Pole C-20A for Panel Protection It breaks 4.5 kA per EN 60898 and 5 kA per IEC 60947-2, covering both residential and industrial coordination requirements. Active in production per the manufacturer's lifecycle status. The 4.5 kA Icn (EN 60898) is the rated short-circuit capacity for domestic distribution boards; the 5 kA Ics (IEC 60947-2) is the service breaking capacity for industrial panels, confirming it can clear a fault and be reclosed without replacement. At 40 °C ambient the breaker derates to 19 A, and at 45 °C to 18.6 A — factor that into the load schedule if the panel runs warm. Four modular-width units (72 mm) snap onto standard DIN rail. The IP20 rating applies with connected conductors, so the busbar stabs and terminals are finger-safe once wired. Sealable, halogen-free, and silicon-free construction suits clean-room or food-processing environments where outgassing matters. ## Integration Notes The 4-pole design (3 phases + neutral) fits three-phase distribution boards. Mechanical endurance is 20 000 switching cycles.","metaTitle":"Siemens 5SL3420-7MB SENTRON MCB, 4P C-20A, 4.5 kA","metaDescription":"Siemens 5SL3420-7MB SENTRON miniature circuit breaker, 4-pole, C-curve, 20 A rated. Breaking capacity 4.5 kA per EN 60898, 5 kA per IEC 60947-2. Active production, available to ord","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["4-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"72 mm","title":"5SL3420-7MB","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breakers Icn: 4.5 kA, 4P, C-Char, In: 20 A","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"4P","Number Of Poles":"4","lifecycle_stage":"current","Mounting Position":"any","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"2","Product Designation":"Miniature circuit breaker","at AC / rated value":"20 A","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Energy Limitation Class":"3","according to EN 61346-2":"F","at 30 °C / rated value":"20 A","at 40 °C / rated value":"19 A","at 45 °C / rated value":"18.6 A","according to IEC 81346-2":"F","Suitability For Operation":"Residential buildings/infrastructure","Number Of Modular Width Units":"4","Tripping Characteristic Class":"C","at DC / rated value / maximum":"72 V","according to EN 60898 / rated value":"4.5 kA","supply voltage / at AC / rated value":"400 V","according to IEC 60947-2 / rated value":"5 kA","Type Of Voltage / Of The Operating Voltage":"AC","with multi-phase operation / at AC / maximum":"440 V","Value Range / Of The Supply Voltage Frequency":"50/60 Hz","with multi-phase operation / at AC / rated value":"440 V","Mechanical Service Life (Switching Cycles) / Typical":"20 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/f81db1e45cb0ab2c549f2501c278787f.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=882895&mlfb=5SL3420-7MB"},"ai":{"faq":[{"question":"Where can I buy 5SL3420-7MB and get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an inquiry for a firm quote."},{"question":"What is the breaking capacity of 5SL3420-7MB?","answer":"It is rated 4.5 kA per EN 60898 and 5 kA per IEC 60947-2. The higher IEC figure means it meets industrial service-break requirements, not just domestic coordination."},{"question":"What compliance documentation does the brand provide for 5SL3420-7MB?","answer":"As a Siemens SENTRON product, it carries CE marking and is designed to EN 60898 and IEC 60947-2. The halogen-free and silicon-free construction supports RoHS and REACH compliance. Specific declarations are available on request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL3420-7MB","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/5SL3420-7MB 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}}