{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SU1353-7KL20","brand":"Siemens","brandSlug":"siemens","productSlug":"5SU1353-7KL20","canonicalUrl":"https://aoctrl.com/siemens/5SU1353-7KL20","factsUrl":"https://aoctrl.com/api/mcp/products/5SU1353-7KL20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON RCBO, 2-pole, 20 A rated, C characteristic, Type A residual current, 4.5 kA per EN 60898, 2 MW, 77 x 36 x 90 mm.","salesMarkdown":"## RCBO for mixed-load final circuits The C curve (5–10× In magnetic trip) suits mixed loads with moderate inrush — lighting banks, small motorised valves, or socket circuits in commercial panels. Type A RCD detects pulsating DC fault currents, covering electronics-fed loads like switched-mode supplies and variable-speed drives, which a plain AC type would miss. Breaking capacity is 4.5 kA per EN 60898 and 5 kA per IEC 60947-2, sufficient for most final sub-distribution boards in residential or light commercial installations where the prospective fault current stays under those thresholds. ## Thermal derating — real-world current The 20 A rating holds only at 30 °C ambient. At 40 °C it derates to 18.8 A; at 50 °C to 17.4 A; at 60 °C to 16.2 A; at 70 °C to 14.6 A. If the panel runs warm — typical inside a packed distribution board — size the upstream protective device and load accordingly. The full derating table runs from 30 °C through 70 °C in 5 °C steps. Two modular-width units (36 mm) snap onto standard DIN rail. Depth is 77 mm, installation depth 70 mm — it clears most 80 mm-deep enclosures. Touch protection is built in, IP20 when the distribution board is closed. Halogen-free and silicon-free construction matters in environments sensitive to outgassing — clean rooms, medical facilities, or areas with silver contacts that corrode under silicone vapour.","metaTitle":"Siemens 5SU1353-7KL20 SENTRON RCBO, 2-pole 20A C-curve, Type","metaDescription":"Siemens 5SU1353-7KL20 SENTRON RCBO, 2-pole, 20 A rated, C tripping characteristic, Type A residual current, 4.5 kA breaking capacity per EN 60898. Active production, sourced to ord","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Residual Current Breakers (RCCB/RCBO)"],"specifications":{"Depth":"77 mm","Width":"36 mm","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Halogen-Free":"Yes","Silicon-Free":"Yes","Number Of Poles":"2","lifecycle_stage":"current","Mounting Position":"any","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"2","Operating Frequency":"50 Hz","Product Designation":"RCBO","acc. to IEC 81346-2":"F","at AC / rated value":"20 A","protection class IP":"IP20, if the distribution board is installed, with connected conductors","Overvoltage Category":"III","Design Of The Product":"Instantaneous","Residual Current Type":"A","acc. to DIN EN 61346-2":"F","Energy Limitation Class":"3","Weight / With Packaging":"298 g","at 30 °C / rated value":"20 A","at 40 °C / rated value":"18.8 A","at 45 °C / rated value":"18.2 A","at 50 °C / rated value":"17.4 A","at 55 °C / rated value":"16.2 A","at 60 °C / rated value":"16.2 A","at 65 °C / rated value":"15.4 A","at 70 °C / rated value":"14.6 A","Number Of Modular Width Units":"2","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":"5 kA","Product Feature / Touch Protection":"Yes","Tripping Fault Current / Rated Value":"30 mA","insulation voltage (Ui) / rated value":"264 V","Supply Voltage Frequency / Rated Value":"50 Hz","Surge Voltage Resistance / Rated Value":"4 000 V","Influence Of The Surrounding Temperature":"Max. 95% humidity","Surge Current Resistance / At (8/20) μS":"1 kA","Type Of Voltage / Of The Operating Voltage":"AC","Product Component / Neutral Conductor Switching":"Yes","Mechanical Service Life (Switching Cycles) / Typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=310491&mlfb=5SU1353-7KL20","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SU1353-7KL20/alternatives.json"},"ai":{"faq":[{"question":"What is the depth of 5SU1353-7KL20?","answer":"Depth is 77 mm; installation depth (behind the panel face) is 70 mm."},{"question":"What is the width of 5SU1353-7KL20?","answer":"Width is 36 mm, which is 2 modular-width units on standard DIN rail."},{"question":"Will 5SU1353-7KL20 drop into a panel specified around 5SL6550-7BB without rewiring?","answer":"Both are 2-pole RCBOs on a 36 mm footprint, so the mechanical fit is the same. However, 5SL6550-7BB is a 50 A B-curve device with different breaking capacity and RCD type — verify the load current and selectivity before swapping."},{"question":"Where can I buy 5SU1353-7KL20?","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/5SU1353-7KL20","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/5SU1353-7KL20 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}}