{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SU1653-0KV20","brand":"Siemens","brandSlug":"siemens","productSlug":"5SU1653-0KV20","canonicalUrl":"https://aoctrl.com/siemens/5SU1653-0KV20","factsUrl":"https://aoctrl.com/api/mcp/products/5SU1653-0KV20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 5SU1653-0KV20 FI/LS protector, Type AC (WS), rated In 20A, B-curve, IΔn 300mA, 4.5kA, 1+N-POL, D=70mm.","salesMarkdown":"The Siemens 5SU1653-0KV20 is a combined residual-current device and miniature circuit breaker — an FI/LS protector — in a single 1+N-POL module, Type AC, with a rated residual current IΔn of 300 mA, a B-curve trip characteristic at 20 A, and a short-circuit breaking capacity of 4.5 kA. It fits a standard DIN-rail enclosure alongside other modular protection devices, saving a module width compared to separate RCD and MCB units. The 70 mm depth (D=70mm) is typical for this class and clears most shallow consumer-unit or panel enclosures without gland-plate interference. The B-curve at 20 A means the magnetic trip operates between 3 and 5 times In (60–100 A) — suited for resistive and general-purpose loads with modest inrush, like lighting banks, control transformers, or heater circuits. The 300 mA residual-current threshold is a delayed-action Type AC trip, designed to detect sinusoidal AC earth faults; it is not intended for pulsating DC or smooth DC fault currents (Type A or F would be required for drives, UPS, or EV chargers). In a panel, verify the upstream SCCR coordination so the 4.5 kA rating is not exceeded under a bolted fault.","metaTitle":"Siemens 5SU1653-0KV20 FI/LS Protector, Type AC, 20A B-Curve,","metaDescription":"Siemens 5SU1653-0KV20 FI/LS protector, Type AC, 20A B-curve, 300mA, 4.5kA, 1+N-POL. Current lifecycle stage. Sourced to order against RFQ.","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=258988&mlfb=5SU1653-0KV20","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SU1653-0KV20/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy the 5SU1653-0KV20 and get a price?","answer":"The 5SU1653-0KV20 is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm commercial offer."},{"question":"What is the 5SU1653-0KV20's rated residual current and breaking capacity?","answer":"The 5SU1653-0KV20 is rated with a residual current IΔn of 300 mA (Type AC), a B-curve trip at 20 A, and a short-circuit breaking capacity of 4.5 kA in a 1+N-POL configuration."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SU1653-0KV20","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/5SU1653-0KV20 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}}