{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL3120-6","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL3120-6","canonicalUrl":"https://aoctrl.com/siemens/5SL3120-6","factsUrl":"https://aoctrl.com/api/mcp/products/5SL3120-6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SL3120-6, 1-pole miniature circuit breaker, B tripping characteristic, 20 A rated current, 4.5 kA breaking capacity per EN 60898, 400 V AC.","salesMarkdown":"## SENTRON 5SL3120-6 — 1-pole B-curve MCB, 20 A It breaks faults up to 4.5 kA per EN 60898 and 5 kA per IEC 60947-2 at 400 V AC — enough for residential and light commercial distribution boards where the prospective short-circuit current stays under those thresholds. Not the right choice for motor circuits with high starting current; that calls for a C or D curve. At 40 °C ambient the continuous rating derates to 18.79 A, and at 55 °C it drops to 16.8 A. Snap-on DIN rail mount, 1 modular unit wide (18 mm). Sealable design and touch protection are built in.","metaTitle":"Siemens 5SL3120-6 SENTRON MCB, 1P B 20A 4.5kA","metaDescription":"Siemens 5SL3120-6 SENTRON miniature circuit breaker, 1-pole, B-curve, 20 A rated, 4.5 kA breaking capacity per EN 60898. Current lifecycle stage, available to order. 18 mm width, 7","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"18 mm","title":"5SL3120-6","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 230/400 V 4.5 kA, 1-pole, B, 20 A","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"1P","Number Of Poles":"1","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":"18.79 A","at 45 °C / rated value":"18.4 A","at 55 °C / rated value":"16.8 A","according to IEC 81346-2":"F","Suitability For Operation":"Residential buildings/infrastructure","Number Of Modular Width Units":"1","Tripping Characteristic Class":"B","at DC / rated value / maximum":"72 V","Product Feature / Touch Protection":"Yes","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","Product Component / Neutral Conductor Switching":"No","with multi-phase operation / at AC / rated value":"440 V","with single-phase operation / at AC / rated value":"250 V","Mechanical Service Life (Switching Cycles) / Typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/5443c47e543e3482bc385f73fa470b51.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=468238&mlfb=5SL3120-6"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SL3120-6?","answer":"4.5 kA per EN 60898 and 5 kA per IEC 60947-2 at 400 V AC. The higher IEC figure gives some headroom for industrial coordination studies."},{"question":"What is the width of 5SL3120-6?","answer":"18 mm, which is 1 modular unit on a DIN rail. Depth is 76 mm."},{"question":"Where can I buy 5SL3120-6?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"Does 5SL3120-6 replace 5SL4120-7CC?","answer":"No direct drop-in replacement relationship is documented. The 5SL3120-6 is a 1-pole B-curve 20 A MCB; the 5SL4120-7CC is a different variant. Verify the specific ratings and curve before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL3120-6","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/5SL3120-6 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}}