{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL1320-7MB","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL1320-7MB","canonicalUrl":"https://aoctrl.com/siemens/5SL1320-7MB","factsUrl":"https://aoctrl.com/api/mcp/products/5SL1320-7MB","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SL1320-7MB miniature circuit breaker, 3-pole, 20 A, C-curve, 3 kA breaking capacity per IEC 60947-2, 230/400 V AC, 3 modular width units, IP20.","salesMarkdown":"It breaks faults up to 3 kA per IEC 60947-2 at 230/400 V AC, 50/60 Hz — enough for most domestic and light commercial distribution boards where the available fault current stays under that threshold. ## Fit and panel integration Mounting position is unrestricted — horizontal, vertical, or flat — which helps when routing conductors in a crowded enclosure. ## Electrical ratings in context Rated for 230 V AC single-phase and 400 V AC three-phase (multi-phase operation up to 440 V AC max). In a residential board with a typical upstream transformer impedance, that's usually adequate; if your service entrance has a higher prospective short-circuit current, you'll need a higher-rated device (like the 10 kA rated 5SL4363-7). For a multi-breaker board, factor that into thermal derating if the ambient is near the 75 °C max. Mechanical life is 4,000 operating cycles typical — fine for a distribution board where the breaker sees infrequent switching. Not intended for daily load-switching duty; that's what a contactor or switch-disconnector is for.","metaTitle":"Siemens 5SL1320-7MB SENTRON MCB, 3P, 20A, C-Curve, 3kA","metaDescription":"Siemens 5SL1320-7MB SENTRON miniature circuit breaker, 3-pole, 20 A, C-curve, 3 kA per IEC 60947-2, 230/400 V AC, 3 MW, IP20. Current production, sourced to order. Request a quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["3-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"54 mm","title":"5SL1320-7MB","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Circuit breaker 230/400V 3kA, 3pole, C, 20A","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"3P","Number Of Poles":"3","lifecycle_stage":"current","Mounting Position":"any","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"2","Product Designation":"Miniature circuit breaker","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Suitability For Operation":"Residential buildings/infrastructure","at DC rated value maximum":"72 V","Number Of Modular Width Units":"3","Tripping Characteristic Class":"C","supply voltage at AC rated value":"230 V","according to IEC 60947-2 rated value":"3 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","with single-phase operation at AC rated value":"253 V","vibration resistance according to IEC 60068-2-6":"no","Mechanical Service Life (Operating Cycles) Typical":"4 000","power loss [W] for rated value of the current at AC in hot operating state per pole":"2.2 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/aafb938f05cdda4b6ebe5b62ac5b14f1.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1046747&mlfb=5SL1320-7MB"},"ai":{"faq":[{"question":"Where can I buy 5SL1320-7MB and what is the lead time?","answer":"We source the 5SL1320-7MB to order through independent distribution. Availability and current pricing are confirmed at quote time against an RFQ — submit a request and we'll provide a firm lead time and price."},{"question":"What is the closest functional second-source to 5SL1320-7MB?","answer":"The Siemens 5SL4363-7 is the closest functional sibling — same 3-pole, C-curve, SENTRON platform, same 76 mm depth and 54 mm width. The key difference: 5SL4363-7 is rated 63 A with a 10 kA breaking capacity per IEC 60947-2, so it drops into the same panel footprint but handles higher current and fault levels. For a 20 A circuit, the 5SL1320-7MB is the correct rating; the 5SL4363-7 would be oversized and may not coordinate with downstream devices."},{"question":"Will 5SL1320-7MB drop into a panel specified around 5SL4363-7 without rewiring?","answer":"Yes — both share the same 54 mm width (3 MW), 76 mm depth, 70 mm installation depth, and DIN-rail mounting. The footprint is identical. The swap is mechanical; you do need to verify that the 20 A rating and 3 kA breaking capacity match the circuit's requirements, because the 5SL4363-7 is a 63 A / 10 kA device."},{"question":"What compliance documentation does Siemens provide for 5SL1320-7MB?","answer":"The 5SL1320-7MB carries the standard SENTRON compliance package: it is halogen-free and silicon-free, rated for overvoltage category III and pollution degree 2. Full RoHS and REACH declarations are available from Siemens on request. The product is designed to meet IEC 60898 and IEC 60947-2, though the listed breaking capacity is per IEC 60947-2."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL1320-7MB","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/5SL1320-7MB 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}}