{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL3320-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL3320-7","canonicalUrl":"https://aoctrl.com/siemens/5SL3320-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SL3320-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SL series, miniature circuit breaker (MCB), order code 5SL3320-7, 3-pole, 20 A rated current, C tripping characteristic, 4.5 kA breaking capacity.","salesMarkdown":"The Siemens 5SL3320-7 is a SENTRON miniature circuit breaker (MCB) with a 20 A rated current at AC, C-curve tripping characteristic, and a 4.5 kA breaking capacity per EN 60898 and IEC 60947-2. This is a 3-pole (3P) unit rated 400 V AC, with a maximum operating voltage of 440 V for multi-phase operation. Wire terminations accept solid or stranded copper from 0.75 to 25 mm², with a tightening torque of 2.5 to 3 N·m on the screw terminals. That's a wide enough range to handle both the feeder tails and the branch-circuit pigtails without an adapter. ## Where it goes and what it protects Siemens rates this MCB for residential buildings and infrastructure — think final sub-circuits in apartment distribution boards, lighting panels, or small commercial loads. It operates in ambient temperatures from -25 to +45 °C, with storage down to -40 °C. The surrounding temperature influence note allows periodic spikes to +55 °C at up to 95% humidity — enough for a non-conditioned electrical room in a hot climate, but not for continuous outdoor exposure. Touch protection is built in on the line-side terminals.","metaTitle":"Siemens 5SL3320-7 SENTRON MCB, 20A C-Curve 3P 4.5kA","metaDescription":"Siemens 5SL3320-7 SENTRON miniature circuit breaker, 20 A, C tripping characteristic, 3-pole, 4.5 kA breaking capacity per EN 60898. Current production. Sourced to order against RF","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["3-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Solid":"0.75 ... 25 mm²","Width":"54 mm","title":"5SL3320-7","Height":"90 mm","Sealable":"Yes","Stranded":"0.75 ... 25 mm²","Rated Value":"50 Hz","description":"Miniature circuit breaker 400 V 4.5 kA, 3-pole, C, 20 A","Halogen-Free":"Yes","Silicon-Free":"Yes","Wertebereich":"-25 ... +45 °C","Number of poles":"3","Type of voltage":"AC","lifecycle_stage":"current","Mounting position":"any","Installation depth":"70 mm","Product brand name":"SENTRON","Ambient temperature":"-40 ... +75 °C","Product designation":"Miniature circuit breaker","Protection class IP":"IP20, with connected conductors","Overvoltage category":"3","Design of the product":"5SL miniature circuit breakers","Energy limiting class":"3","Number of width units":"3","Number of poles / Note":"3P","acc. to DIN EN 61346-2":"F","acc. to DIN EN 81346-2":"F","circuit-breaker / Design":"5SL3","Suitability for operation":"Residential buildings/infrastructure","Current / at AC / rated value":"20 A","Tripping characteristic class":"C","at DC / rated value / maximum":"60 V","acc. to EN 60898 / rated value":"4.5 kA","acc. to IEC 60947-2 / rated value":"4.5 kA","Product feature / Touch protection":"Yes","Supply voltage / at AC / rated value":"400 V","Influence of the surrounding temperature":"Periodically +55°C, max. 95% humidity","with multi-phase operation / at AC / maximum":"440 V","Tightening torque / with screw-type terminals":"2.5 ... 3 N·m","Product function / neutral conductor switching":"No","with multi-phase operation / at AC / rated value":"440 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/1dcac740402a95a00b94d6f61b96b272.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=472174&mlfb=5SL3320-7"},"ai":{"faq":[{"question":"What wire sizes does 5SL3320-7 accept?","answer":"Solid and stranded copper from 0.75 to 25 mm², with a tightening torque of 2.5 to 3 N·m on the screw terminals."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL3320-7","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/5SL3320-7 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}}