{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SU1354-6FM20","brand":"Siemens","brandSlug":"siemens","productSlug":"5SU1354-6FM20","canonicalUrl":"https://aoctrl.com/siemens/5SU1354-6FM20","factsUrl":"https://aoctrl.com/api/mcp/products/5SU1354-6FM20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SU1 RCBO, 2-pole 1P+N, 20 A rated current, B tripping characteristic, 10 kA breaking capacity per EN 60898, Type A fault current, 2 MW wide.","salesMarkdown":"It protects a 1P+N final subcircuit against both overload/short-circuit (B-curve magnetic trip at 20 A) and earth leakage (Type A, sensitive to pulsating DC fault currents). ## Thermal derating — the real-world current limit The 20 A rating holds only at 30 °C ambient. In a crowded enclosure at 40 °C the continuous current drops to 18.8 A; at 50 °C it's 17.4 A; at 55 °C (the upper operating limit) it's 16.2 A. If your panel ambient runs 60 °C the part still carries 16.2 A, and at 70 °C it's 14.6 A. That derating curve is the number that governs the real load — size the downstream circuit for the temperature you actually see inside the board, not the label on the front. The 5SU1354-6FM20 snaps onto DIN rail, occupies 2 width units (36 mm), and accepts conductors from 0.75 mm² up to 35 mm² — solid or stranded. Mounting position is unrestricted, and the supply can enter from either top or bottom. The IP20 rating applies only when the distribution board is installed and conductors are connected — treat it as a panel-internal part, not a standalone surface-mount device.","metaTitle":"Siemens 5SU1354-6FM20 SENTRON RCBO, 20 A, B curve, 10 kA","metaDescription":"Siemens 5SU1354-6FM20 SENTRON RCBO, 2-pole 1P+N, 20 A, B tripping characteristic, 10 kA breaking capacity per EN 60898. Type A fault current, halogen-free. Available to order.","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","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":"A","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":"B","acc. to EN 60898 / rated value":"10 kA","For Testing Equipment / Minimum":"195 V","Position / of power supply cord":"Either top or bottom","Number of poles / with protection":"2","acc. to IEC 60947-2 / rated value":"20 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/e236b7527284376f78b04c55e1934dfe.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=128924&mlfb=5SU1354-6FM20","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SU1354-6FM20/alternatives.json"},"ai":{"faq":[{"question":"What is the 5SU1354-6FM20's breaking capacity?","answer":"10 kA rated value per EN 60898, which certifies it for use in standard final subcircuits up to that prospective fault level."},{"question":"What conductor sizes does the 5SU1354-6FM20 accept?","answer":"Solid and stranded conductors from 0.75 mm² up to 35 mm²."},{"question":"Where can I buy the 5SU1354-6FM20?","answer":"Sourced and quoted to order against an RFQ through independent distribution; availability and current pricing confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SU1354-6FM20","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/5SU1354-6FM20 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}}