{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SU9104-1KK45","brand":"Siemens","brandSlug":"siemens","productSlug":"5SU9104-1KK45","canonicalUrl":"https://aoctrl.com/siemens/5SU9104-1KK45","factsUrl":"https://aoctrl.com/api/mcp/products/5SU9104-1KK45","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SU9 series, RCBO (RCD-operated circuit breaker), 45 A, 10 kA, Type C, 1P+N, 18 mm wide.","salesMarkdown":"The Siemens 5SU9104-1KK45 is a 1P+N RCBO — an RCD-operated circuit breaker from the SENTRON 5SU9 series. It combines overcurrent protection and residual current detection in a single 18 mm wide module, rated 45 A at 30 °C with a C tripping characteristic and 10 kA breaking capacity per EN 60898 and IEC 60947-2. This is the part you reach for when you need to protect a final subcircuit against both overload/short-circuit and earth leakage, all in one DIN-rail slot. The 45 A rating at 30 °C is the headline number, but the derating curve matters more in a warm panel: at 40 °C it's 42.3 A, at 45 °C it's 40.95 A, and at 55 °C it drops to 36.45 A. If your enclosure ambient sits at 45 °C and the load pulls 41 A, this RCBO is already at its limit — size up or ventilate. The residual current side is instantaneous (design of the product: instantaneous) and AC-type (type of fault current: AC), meaning it detects sinusoidal AC earth faults only — not pulsating DC or smooth DC. That's fine for general-purpose final circuits feeding resistive, inductive, or electronic loads with a simple bridge rectifier, but if the downstream equipment has variable-speed drives or switched-mode power supplies that generate pulsed DC leakage, you'd need a Type A or Type F RCBO instead. This one is for the straightforward AC residual current job. ## Where it lives in the panel It snaps onto a DIN rail (mounting position any) and occupies one width unit (18 mm wide, 125 mm tall, 77 mm deep, 70 mm installation depth). The supply can come from either the top or bottom terminals (position of power supply cord: either top or bottom), which simplifies busbar routing in a crowded enclosure.","metaTitle":"Siemens 5SU9104-1KK45 SENTRON RCBO, 45 A, 10 kA, Type C","metaDescription":"Siemens 5SU9104-1KK45 SENTRON RCBO, 45 A rated current, 10 kA breaking capacity, Type C characteristic, 1P+N, 18 mm wide. Current production. 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":"18 mm","title":"5SU9104-1KK45","Height":"125 mm","Maximum":"0.75 W","Stranded":"0.75 ... 35 mm²","at 30 Cel":"45 A","at 40 Cel":"42.3 A","at 45 Cel":"40.95 A","at 50 Cel":"39.15 A","at 55 Cel":"36.45 A","description":"RCBO, 10 kA, 1P+N, Type AC, 10 mA, C-Char, In: 45 A, Un AC: 230 V, pigtail 600 mm, solid N","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":"45 A","Tripping characteristic class":"C","acc. to EN 60898 / rated value":"10 kA","For Testing Equipment / Minimum":"125 V","Position / of power supply cord":"Either top or bottom","Number of poles / with protection":"1","acc. to IEC 60947-2 / rated value":"10 kA","Product feature / Touch protection":"Yes","Supply voltage frequency / rated value":"50 Hz","Tripping residual current / rated value":"10 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,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/29e0dff621df343745c5e1f89652fe86.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=629224&mlfb=5SU9104-1KK45"},"ai":{"faq":[{"question":"Where can I buy 5SU9104-1KK45 and get a price?","answer":"We source this RCBO to order against an RFQ. Submit a request and we'll confirm availability and current pricing at quote time."},{"question":"What is the rated current and breaking capacity of 5SU9104-1KK45?","answer":"Rated current is 45 A at 30 °C (derated at higher temperatures), with a 10 kA breaking capacity per EN 60898 and IEC 60947-2."},{"question":"What conductor sizes does 5SU9104-1KK45 accept?","answer":"Both solid and stranded conductors from 0.75 mm² up to 35 mm²."},{"question":"What compliance documentation is available for 5SU9104-1KK45?","answer":"The part carries EN 60898 and IEC 60947-2 ratings, is halogen-free and silicon-free, and is designed to overvoltage category III with touch protection. Specific RoHS/REACH declarations are available on request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SU9104-1KK45","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/5SU9104-1KK45 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}