{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL4320-7CC","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL4320-7CC","canonicalUrl":"https://aoctrl.com/siemens/5SL4320-7CC","factsUrl":"https://aoctrl.com/api/mcp/products/5SL4320-7CC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SL4320-7CC miniature circuit breaker, 3-pole, C-curve, 20 A, 10 kA at 400 V AC, 3 MW units.","salesMarkdown":"## What the ratings mean for your panel The Siemens 5SL4320-7CC is a SENTRON miniature circuit breaker rated 20 A at 400 V AC with a C tripping characteristic and a 10 kA breaking capacity per EN 60898. The C-curve means it trips between 5 and 10 times rated current — the standard choice for general-purpose loads like lighting, socket outlets, and small motor circuits where moderate inrush is expected. The 10 kA SCCR at 400 V AC tells you this breaker can safely interrupt a fault current up to that level without welding its contacts or cascading failure upstream, assuming the panel's prospective short-circuit current stays within that limit. Three-pole design (3P) switches all phases simultaneously, so it is suited for three-phase branch circuits in residential, commercial, and infrastructure distribution boards. ## Panel integration and mounting The breaker occupies 3 modular width units (each 18 mm) on a standard DIN rail, with a depth of 76 mm and height of 90 mm. It mounts in any position and requires 70 mm installation depth behind the panel surface. Touch protection is built in, and the housing is halogen-free and silicon-free — relevant for clean-room or low-smoke environments. IP20 with connected conductors means it is protected against finger contact but not washdown; this is a dry indoor panel part. ## Thermal derating and ambient range Rated current is 20 A at 30 °C ambient. At elevated panel temperatures the breaker derates: 18.94 A at 40 °C, 18.39 A at 45 °C, 17.82 A at 50 °C, and 17.24 A at 55 °C. If your panel runs hot — say, a packed enclosure near a furnace line — size your load to the derated figure at the actual ambient, not the 20 A nameplate. The operating ambient range spans -40 °C to 75 °C, so it handles cold starts in unheated substations.","metaTitle":"Siemens 5SL4320-7CC SENTRON MCB, 3P C 20A 10kA 400V","metaDescription":"Siemens 5SL4320-7CC SENTRON miniature circuit breaker, 3-pole, C-curve, 20 A rated, 10 kA breaking capacity at 400 V AC. Active production. Quoted to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["3-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"54 mm","title":"5SL4320-7CC","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 400 V 10kA, 3-pole, C, 20 A Circuit breaker 400 V 10kA, 3-pole, C, 20 A","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","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":"18.94 A","at 45 °C / rated value":"18.39 A","at 50 °C / rated value":"17.82 A","at 55 °C / rated value":"17.24 A","according to IEC 81346-2":"F","Suitability For Operation":"Residential buildings/infrastructure","Number Of Modular Width Units":"3","Tripping Characteristic Class":"C","at DC / rated value / maximum":"72 V","Product Feature / Touch Protection":"Yes","according to EN 60898 / rated value":"10 kA","supply voltage / at AC / rated value":"400 V","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","vibration resistance / according to IEC 60068-2-6":"50 m/s² at 25 to 150 Hz"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/b97409499536e89ee77516dc7ad97276.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=513431&mlfb=5SL4320-7CC"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 5SL4320-7CC?","answer":"Submit an RFQ. This part is sourced through independent distribution; availability and current pricing are confirmed at quote time against your required quantity and delivery window."},{"question":"Will 5SL4320-7CC drop into a panel specified around 5SL3340-7CC without rewiring?","answer":"Both are 3-pole SENTRON MCBs on the same DIN-rail footprint, so the mechanical fit is identical. The difference is the trip curve: 5SL4320-7CC is a C-curve (5-10x In), while 5SL3340-7CC is a B-curve (3-5x In). If the original design called for B-curve selectivity, swapping to C-curve may change coordination with downstream devices — verify the trip curve against your load before substituting."},{"question":"What compliance documentation does Siemens provide for 5SL4320-7CC?","answer":"The breaker carries EN 60898 certification for the 10 kA breaking capacity at 400 V AC. The housing is halogen-free and silicon-free, and the product is designed to IEC 61346-2 and IEC 81346-2 functional designation F. For specific RoHS/REACH declarations, request the manufacturer's compliance statement through the RFQ process."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL4320-7CC","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/5SL4320-7CC 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}}