{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SU1353-1KL20","brand":"Siemens","brandSlug":"siemens","productSlug":"5SU1353-1KL20","canonicalUrl":"https://aoctrl.com/siemens/5SU1353-1KL20","factsUrl":"https://aoctrl.com/api/mcp/products/5SU1353-1KL20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SU1 series RCBO, 1P+N, 20 A rated current, C tripping characteristic, 4.5 kA breaking capacity per EN 60898, 36 mm width (2 MW), AC fault current type.","salesMarkdown":"The Siemens 5SU1353-1KL20 is a 1P+N RCBO from the SENTRON 5SU1 series, combining overcurrent and residual current protection in a single 36 mm wide module (2 width units). It is rated 20 A with a C tripping characteristic and a 4.5 kA breaking capacity per EN 60898, meaning it handles moderate inrush from motor or lighting loads while providing fault current interruption up to 4.5 kA. Rated current derates with ambient temperature: 20 A at 30 °C, dropping to 14.6 A at 70 °C (–), so if the panel runs hot, factor that into the load schedule. IP20 applies only when the distribution board is installed and conductors are connected; the RCBO itself is not rated for exposed or washdown locations. The C-curve means magnetic trip occurs at 5 to 10 times rated current (100–200 A for this 20 A unit), which is typical for circuits with motor or transformer inrush. Energy limiting class 3 indicates it lets through relatively low let-through energy during a fault, which helps with downstream coordination.","metaTitle":"Siemens 5SU1353-1KL20 SENTRON RCBO, 20A C-curve 1P+N, 4.5kA","metaDescription":"Siemens 5SU1353-1KL20 SENTRON RCBO, 20 A rated, C tripping characteristic, 1P+N, 4.5 kA breaking capacity per EN 60898. 36 mm wide (2 MW). Active production. Sourced to order again","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Residual Current Breakers (RCCB/RCBO)"],"specifications":{"Depth":"77 mm","Solid":"0.75 ... 35 mm²","Width":"36 mm","Height":"90 mm","Maximum":"6.6 W","Stranded":"0.75 ... 35 mm²","at 30 Cel":"20 A","at 40 Cel":"18.8 A","at 45 Cel":"18.2 A","at 50 Cel":"17.4 A","at 55 Cel":"16.2 A","at 60 Cel":"16.2 A","at 65 Cel":"15.4 A","at 70 Cel":"14.6 A","Halogen-Free":"Yes","Silicon-Free":"Yes","During Storage":"-40 ... +75 °C","Number of poles":"2","Type of voltage":"AC","lifecycle_stage":"current","Mounting position":"any","Installation depth":"70 mm","Product brand name":"SENTRON","Ambient temperature":"-25 ... +55 °C","Product designation":"RCBO","Protection class IP":"IP20, if the distribution board is installed, with connected conductors","Overvoltage category":"III","Design of the product":"Instantaneous","Energy limiting class":"3","Number of width units":"2","Type of fault current":"AC","Number of poles / Note":"1P+N","acc. to DIN EN 61346-2":"F","acc. to DIN EN 81346-2":"F","circuit-breaker / Design":"5SU1","Current / at AC / rated value":"20 A","Tripping characteristic class":"C","acc. to EN 60898 / rated value":"4.5 kA","For Testing Equipment / Minimum":"195 V","Position / of power supply cord":"Either top or bottom","Number of poles / with protection":"1","acc. to IEC 60947-2 / rated value":"4.5 kA","Product feature / Touch protection":"Yes","Supply voltage frequency / rated value":"50 Hz","Tripping residual current / rated value":"30 mA","Influence of the surrounding temperature":"Max. 95% humidity","Surge current resistance / at (8/20) μs":"1 kA","Tightening torque / with screw-type terminals":"2.5 ... 3 N·m","Product function / neutral conductor switching":"Yes","Mechanical service life (switching cycles) / typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/e1863d00b854d478a8ec8ca7f3aab84f.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=240052&mlfb=5SU1353-1KL20","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SU1353-1KL20/alternatives.json"},"ai":{"faq":[{"question":"What conductor sizes does 5SU1353-1KL20 accept?","answer":"Both solid and stranded conductors from 0.75 mm² up to 35 mm². That covers final subcircuit wiring and larger incoming tails within a single terminal range."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SU1353-1KL20","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/5SU1353-1KL20 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}