{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SU1653-1KV20","brand":"Siemens","brandSlug":"siemens","productSlug":"5SU1653-1KV20","canonicalUrl":"https://aoctrl.com/siemens/5SU1653-1KV20","factsUrl":"https://aoctrl.com/api/mcp/products/5SU1653-1KV20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 5SU1653-1KV20 FI/LS protector, Type AC (WS), D=70mm, IΔn 300mA, 4.5kA, 1+N-P, C 20A.","salesMarkdown":"The Siemens 5SU1653-1KV20 is a combined residual-current device and miniature circuit breaker (RCD/MCB), known as an FI/LS protector. It combines Type AC residual current detection at 300 mA with a C-curve overcurrent trip at 20 A, all in a single 1+N-P module. The 4.5 kA short-circuit breaking capacity handles typical domestic and light commercial fault levels. The 300 mA residual sensitivity is a delayed (S-type) characteristic, intended as a fire-protection or selective earth-leakage device upstream of 30 mA RCDs. It will not trip on the leakage from a single person touching a live conductor; that is the 30 mA level. The D=70 mm dimension refers to the depth behind the panel, so verify enclosure depth if retrofitting into a shallow consumer unit. This is a 1+N-P module — it switches and protects the line conductor only; the neutral is switched but not protected. If the fault level exceeds 4.5 kA, an upstream backup fuse or MCB is required.","metaTitle":"Siemens 5SU1653-1KV20 FI/LS Protector, Type AC, 20A C, 300mA","metaDescription":"Siemens 5SU1653-1KV20 FI/LS protector, Type AC, 20A C-curve, 300mA, 4.5kA, 1+N-P. Lifecycle stage: current. 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=270274&mlfb=5SU1653-1KV20","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SU1653-1KV20/alternatives.json"},"ai":{"faq":[{"question":"What is the 5SU1653-1KV20 used for?","answer":"It is a combined RCD/MCB (FI/LS protector) for final circuits. The 300 mA residual sensitivity makes it suitable for fire protection or as a selective upstream device, while the 20 A C-curve overcurrent protects general socket and lighting circuits."},{"question":"Where can I buy the 5SU1653-1KV20?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at the time of quotation."},{"question":"What does Type AC mean on this RCD?","answer":"Type AC residual current detection responds only to sinusoidal AC fault currents. It is the standard type for circuits without electronic loads that generate pulsed DC or high-frequency leakage."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SU1653-1KV20","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/5SU1653-1KV20 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}}