{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SU9306-0KK25","brand":"Siemens","brandSlug":"siemens","productSlug":"5SU9306-0KK25","canonicalUrl":"https://aoctrl.com/siemens/5SU9306-0KK25","factsUrl":"https://aoctrl.com/api/mcp/products/5SU9306-0KK25","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SU9 series, RCD-operated circuit breaker, 25 A, B characteristic, 6 kA, 1P+N, 18 mm width.","salesMarkdown":"The Siemens SENTRON 5SU9306-0KK25 is an RCD-operated circuit breaker (RCBO) combining overcurrent and residual current protection in a single 18 mm wide unit. Rated 25 A at 30 °C with a B tripping characteristic, it handles AC fault currents and provides 6 kA breaking capacity per EN 60898 and IEC 60947-2. The 1P+N configuration protects one live pole while switching the neutral. The 25 A rating at 30 °C is the headline figure, but the derating curve matters in a warm panel: at 40 °C it carries 23.5 A, at 45 °C it drops to 22.75 A, and at 55 °C it's 20.25 A. If your enclosure ambient sits at 45 °C, size the load to 22.75 A continuous, not the 25 A nameplate. In a domestic or light commercial distribution board with a typical upstream fuse or MCB rated 6 kA or less, it coordinates without requiring a current-limiting device upstream. Supply can enter from either top or bottom, which simplifies busbar routing in a crowded board. Mounting position is unrestricted, so it can be installed horizontally or vertically without derating. The IP20 rating applies only when the distribution board is installed and conductors are connected — treat it as a panel-internal device, not for standalone outdoor use. Touch protection is built in (fingertip-safe terminals).","metaTitle":"Siemens SENTRON 5SU9306-0KK25 RCD Circuit Breaker, 25 A, B C","metaDescription":"Siemens SENTRON 5SU9306-0KK25 RCD-operated circuit breaker, 25 A rated current at 30 °C, B tripping characteristic, 6 kA breaking capacity per EN 60898. 1P+N, 18 mm width. Current","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Residual Current Breakers (RCCB/RCBO)"],"specifications":{"Depth":"77 mm","Solid":"0.75 ... 35 mm²","Width":"18 mm","Height":"125 mm","Maximum":"0.75 W","Stranded":"0.75 ... 35 mm²","at 30 Cel":"25 A","at 40 Cel":"23.5 A","at 45 Cel":"22.75 A","at 50 Cel":"21.75 A","at 55 Cel":"20.25 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 ... +45 °C","Product designation":"RCD-operated circuit breaker","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":"1","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":"5SU9","Current / at AC / rated value":"25 A","Tripping characteristic class":"B","acc. to EN 60898 / rated value":"6 kA","For Testing Equipment / Minimum":"115 V","Position / of power supply cord":"Either top or bottom","Number of poles / with protection":"1","acc. to IEC 60947-2 / rated value":"6 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":"1.2 ... 2 N·m","Product function / neutral conductor switching":"No","Mechanical service life (switching cycles) / typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/afd84d4cd92063d3fe7003ce39deab53.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=629273&mlfb=5SU9306-0KK25","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SU9306-0KK25/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SU9306-0KK25?","answer":"It is rated 6 kA per both EN 60898 and IEC 60947-2, which covers standard domestic and light commercial distribution boards."},{"question":"What conductor sizes does 5SU9306-0KK25 accept?","answer":"The terminals accept solid or stranded conductors from 0.75 mm² up to 35 mm²."},{"question":"Where can I buy 5SU9306-0KK25?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SU9306-0KK25","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/5SU9306-0KK25 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}}