{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SU1654-1KV25","brand":"Siemens","brandSlug":"siemens","productSlug":"5SU1654-1KV25","canonicalUrl":"https://aoctrl.com/siemens/5SU1654-1KV25","factsUrl":"https://aoctrl.com/api/mcp/products/5SU1654-1KV25","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 5SU1654-1KV25 FI/LS protector, Type AC, 70mm wide, 300mA IΔn, 10kA, 1+N-pole, C-curve 25A.","salesMarkdown":"The Siemens 5SU1654-1KV25 is an FI/LS combination unit — an RCBO that packs both residual-current and overcurrent protection into one 70 mm wide, 1+N-pole package. Type AC detection means it trips on sinusoidal AC earth faults; the 300 mA IΔn is sized for circuits where a lower threshold would nuisance-trip (lighting, general sockets in commercial or industrial distribution boards). The C-curve 25 A thermal-magnetic characteristic handles moderate inrush from motorised loads or fluorescent banks without dropping out on start-up. ## Rated breaking capacity and coordination If your distribution board's upstream fault level exceeds that, the 5SU1654-1KV25 needs a current-limiting backup fuse or MCB ahead of it; a 16 A gG or similar will keep let-through energy within the device's rating. ## Panel integration The 70 mm width matches the standard Siemens FI/LS module footprint — clips onto the DIN rail, occupies two 17.5 mm modular spaces plus the neutral pole width. Phase and neutral conductors terminate under captive screws; the outgoing neutral is internal to the unit, so no separate N-terminal block needed downstream. For a 25 A C-curve RCBO, check the ambient temperature inside the enclosure: above 40 °C, the thermal trip threshold shifts, so either derate or leave ventilation slots clear.","metaTitle":"Siemens 5SU1654-1KV25 FI/LS Protector, Type AC, 25A C, 300mA","metaDescription":"Siemens 5SU1654-1KV25 FI/LS protector, Type AC, 25A C-curve, 300mA IΔn, 10kA breaking capacity, 1+N pole. Current production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Residual Current Breakers (RCCB/RCBO)"],"specifications":{"lifecycle_stage":"current"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=214006&mlfb=5SU1654-1KV25","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SU1654-1KV25/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 5SU1654-1KV25 and get current pricing?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What compliance documentation does Siemens provide for 5SU1654-1KV25?","answer":"The device carries IEC 60898-1 certification for the overcurrent side and IEC 61008-1 for the residual-current function. RoHS and CE marking apply per Siemens standard practice for this series."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SU1654-1KV25","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/5SU1654-1KV25 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}}