{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SU1356-1KK20","brand":"Siemens","brandSlug":"siemens","productSlug":"5SU1356-1KK20","canonicalUrl":"https://aoctrl.com/siemens/5SU1356-1KK20","factsUrl":"https://aoctrl.com/api/mcp/products/5SU1356-1KK20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SU1356-1KK20 RCBO, 1P+N, C-curve, 20 A at 30 °C, 6 kA (EN 60898) / 15 kA (IEC 60947-2), instantaneous design, 2 MW, IP20.","salesMarkdown":"It protects a single-phase final subcircuit against overload, short-circuit, and earth leakage. The 1P+N construction switches the line conductor and breaks the neutral, with one protected pole. This is the instantaneous (non-time-delayed) version, so it trips on residual current without intentional delay — standard for general-purpose socket and lighting circuits where no upstream selectivity is needed. The breaking capacity is 6 kA per EN 60898 for domestic-type coordination and 15 kA per IEC 60947-2 for industrial installation — meaning it can clear a fault up to 15 kA at the supply terminals without welding its contacts. That dual rating gives the specifying engineer flexibility: the 6 kA figure satisfies most residential and commercial boards; the 15 kA figure covers industrial distribution where fault current is higher. ## Temperature derating — the real current you get The 20 A rating is only valid at 30 °C ambient inside the panel. At 40 °C it derates to 18.8 A; at 50 °C to 17.4 A; at 60 °C to 16.2 A; and at 70 °C to 14.6 A. The derating curve is published; factor it into the load calculation before committing the BOM line. Depth is 77 mm, installation depth 70 mm.","metaTitle":"Siemens 5SU1356-1KK20 SENTRON RCBO, C-curve 20 A, 6/15 kA","metaDescription":"Siemens 5SU1356-1KK20 SENTRON RCBO, 1P+N, C-curve, 20 A at 30 °C, 6 kA (EN 60898) / 15 kA (IEC 60947-2). Current production. Sourced to order. RFQ for volume pricing.","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","Design Of Pole":"1P+N","Number Of Poles":"2","lifecycle_stage":"current","Mounting Position":"any","at AC rated value":"230/240 V","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"2","Operating Frequency":"50 Hz","Product Designation":"RCBO","protection class IP":"IP20, if the distribution board is installed, with connected conductors","Overvoltage Category":"III","Design Of The Product":"Instantaneous","Weight With Packaging":"283 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","Energy Limitation Class":"3","For Testing Equipment Minimum":"195 V","Number Of Modular Width Units":"2","Position Of Power Supply Cord":"Either top or bottom","Tripping Characteristic Class":"C","Number Of Poles With Protection":"1","according to EN 60898 rated value":"6 kA","insulation voltage (Ui) rated value":"264 V","Supply Voltage Frequency Rated Value":"50 Hz","Surge Voltage Resistance Rated Value":"4 000 V","according to IEC 60947-2 rated value":"15 kA","Surge Current Resistance At (8/20) μS":"1 kA","Influence Of The Surrounding Temperature":"Max. 95% humidity","Type Of Voltage Of The Operating Voltage":"AC","Mechanical Service Life (Operating Cycles) Typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/25c2993a8719cf5a37d11f186ab3e87b.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=168974&mlfb=5SU1356-1KK20","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SU1356-1KK20/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SU1356-1KK20?","answer":"6 kA per EN 60898 and 15 kA per IEC 60947-2. The higher figure applies when the device is used in an industrial coordination context."},{"question":"Will 5SU1356-1KK20 drop into a panel specified around 5SU9354-7KK16?","answer":"Both are 2-MW DIN-rail RCBOs with the same 36 mm width and 77 mm depth, so the mechanical fit is identical. The functional difference is the tripping characteristic and rating — verify the C-curve and 20 A rating match your load schedule before swapping."},{"question":"Where can I buy 5SU1356-1KK20 and how is it quoted?","answer":"Sourced to order through independent distribution. Submit an RFQ for current pricing and lead time — availability is confirmed at quote time."},{"question":"What compliance documentation is available for 5SU1356-1KK20?","answer":"The device is halogen-free and silicon-free. It carries a CE mark per the Low Voltage Directive and is designed to EN 60898 and IEC 60947-2. Specific RoHS/REACH declarations are available from the manufacturer upon request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SU1356-1KK20","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/5SU1356-1KK20 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}}