{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SU9156-7VK25","brand":"Siemens","brandSlug":"siemens","productSlug":"5SU9156-7VK25","canonicalUrl":"https://aoctrl.com/siemens/5SU9156-7VK25","factsUrl":"https://aoctrl.com/api/mcp/products/5SU9156-7VK25","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SU9 series, RCD-operated circuit breaker (RCBO), 2-pole 1P+N, 25 A rated, Type A fault current, tripping characteristic C, breaking capacity 6 kA per EN 60898 / 10 kA per IEC 60947-2.","salesMarkdown":"The Siemens 5SU9156-7VK25 is a SENTRON RCBO — a combined overcurrent and residual-current device in a 2-module (36 mm wide) package. The Type A fault-current detection catches pulsating DC faults up to the rated residual current, which matters for VFD-fed loads and single-phase rectifier circuits common in industrial control panels. The 6 kA EN rating is the domestic/commercial standard; the 10 kA IEC rating gives headroom for higher available fault current in plant-floor panels. ## Thermal derating and conductor sizing At 40 °C it derates to 23.5 A, at 45 °C to 22.75 A, at 50 °C to 21.75 A, and at 55 °C to 20.25 A. The terminals accept solid or stranded conductors from 0.75 mm² up to 35 mm², which covers everything from 1.5 mm² lighting circuits to 10 mm² feeder tails. Snaps onto standard DIN rail, 36 mm wide (2 width units), 90 mm tall, 77 mm deep with 70 mm installation depth. Mounting position any orientation. Supply can enter from top or bottom — no mandatory polarity for the line/load side. IP20 with the distribution board installed and conductors connected; overvoltage category III, so it's rated for fixed installation downstream of the main panelboard. Halogen-free and silicon-free construction, which matters for clean-room or semiconductor-adjacent installs where outgassing contaminates optics. Listed as current production. The 5SU9 series is Siemens' standard RCBO line for the European and export markets; no phase-out notice or last-buy window is published for this order code.","metaTitle":"Siemens 5SU9156-7VK25 SENTRON RCBO, 25 A, Type A, 6 kA","metaDescription":"Siemens 5SU9156-7VK25 SENTRON RCBO, 2-pole 1P+N, 25 A rated, Type A fault current, 6 kA (EN 60898) / 10 kA (IEC 60947-2), tripping characteristic C. Current production. Sourced to","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":"36 mm","Height":"90 mm","Maximum":"1.5 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","Energy limiting class":"3","Number of width units":"2","Type of fault current":"A","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":"C","acc. to EN 60898 / rated value":"6 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":"2.5 ... 3 N·m","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/b34f6fc73c9041808a51740cbf4a36b4.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=629244&mlfb=5SU9156-7VK25","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SU9156-7VK25/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SU9156-7VK25?","answer":"6 kA per EN 60898 and 10 kA per IEC 60947-2. The IEC rating governs in industrial distribution panels with higher available fault current."},{"question":"What conductor sizes does 5SU9156-7VK25 accept?","answer":"Solid or stranded conductors from 0.75 mm² up to 35 mm². This covers 1.5 mm² branch circuits through 10 mm² feeder connections."},{"question":"What is the thermal derating for 5SU9156-7VK25?","answer":"Full 25 A at 30 °C, derating to 23.5 A at 40 °C, 22.75 A at 45 °C, 21.75 A at 50 °C, and 20.25 A at 55 °C."},{"question":"Where can I buy 5SU9156-7VK25?","answer":"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/5SU9156-7VK25","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/5SU9156-7VK25 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}}