{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SU1324-6KX40","brand":"Siemens","brandSlug":"siemens","productSlug":"5SU1324-6KX40","canonicalUrl":"https://aoctrl.com/siemens/5SU1324-6KX40","factsUrl":"https://aoctrl.com/api/mcp/products/5SU1324-6KX40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SU1 series RCBO, 2-pole (2P), 40 A rated current, Type A fault current sensitivity, B-curve tripping characteristic, 10 kA breaking capacity at 110/120 V AC, 50 Hz.","salesMarkdown":"The B-curve tripping characteristic suits resistive and general-purpose loads. Breaking capacity is 10 kA per EN 60898 at 110/120 V AC, 50 Hz — enough for most residential and light commercial distribution boards where the prospective short-circuit current stays under that threshold. The 2-pole (2P) form switches both phase and neutral, and the device is rated for overvoltage category III (distribution-level surge immunity) with pollution degree 2. ## Derating and thermal reality — what the current numbers actually tell you At 40 °C it's 37.6 A; at 50 °C it's 34.8 A; at 60 °C it's 32.4 A; at 70 °C it's 29.2 A. Width is 54 mm (3 width units at 18 mm each), depth 77 mm, height 90 mm, with an installation depth of 70 mm into the distribution board. Supply can enter from either top or bottom, which saves time when you're retrofitting into an existing board with fixed busbar orientation. Production status is current. This part is in active manufacture by Siemens under the SENTRON brand.","metaTitle":"Siemens SENTRON 5SU1324-6KX40 RCBO, 2P, 40 A, Type A, 10 kA","metaDescription":"Siemens SENTRON 5SU1324-6KX40 RCBO, 2-pole, 40 A rated at 30 °C, Type A fault current, 10 kA breaking capacity per EN 60898. Current production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Residual Current Breakers (RCCB/RCBO)"],"specifications":{"Depth":"77 mm","Width":"54 mm","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","at 30 Cel":"40 A","at 40 Cel":"37.6 A","at 45 Cel":"36.4 A","at 50 Cel":"34.8 A","at 55 Cel":"32.4 A","at 60 Cel":"32.4 A","at 65 Cel":"30.8 A","at 70 Cel":"29.2 A","Halogen-Free":"Yes","Silicon-Free":"Yes","Number Of Poles":"2","Type Of Voltage":"AC","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","at AC / rated value":"110/120 V","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":"3","Type Of Fault Current":"A","Number Of Poles / Note":"2P","acc. to DIN EN 61346-2":"F","acc. to DIN EN 81346-2":"F","circuit-breaker / Design":"5SU1","Tripping Characteristic Class":"B","acc. to EN 60898 / rated value":"10 kA","For Testing Equipment / Minimum":"100 V","Position / Of Power Supply Cord":"Either top or bottom","Number Of Poles / With Protection":"2","acc. to IEC 60947-2 / rated value":"15 kA","Product Feature / Touch Protection":"Yes","Supply Voltage Frequency / Rated Value":"50 Hz","Tripping Residual Current / Rated Value":"30 mA","operating current / at AC / rated value":"40 A","Influence Of The Surrounding Temperature":"Max. 95% humidity","Surge Current Resistance / At (8/20) μS":"1 kA","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/f8a3f804604e34cc21a3fa836405929c.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=603553&mlfb=5SU1324-6KX40","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SU1324-6KX40/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SU1324-6KX40","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/5SU1324-6KX40 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}}