{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SU1353-0KV20","brand":"Siemens","brandSlug":"siemens","productSlug":"5SU1353-0KV20","canonicalUrl":"https://aoctrl.com/siemens/5SU1353-0KV20","factsUrl":"https://aoctrl.com/api/mcp/products/5SU1353-0KV20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 5SU1353-0KV20 FI/LS protector, Type AC (WS), 30 mA, 4.5 kA, 1+N-pole, B characteristic 20 A.","salesMarkdown":"Siemens 5SU1353-0KV20 is a combined residual-current device and miniature circuit breaker (RCBO), often called an FI/LS protector in European panel practice. It integrates Type AC residual current detection at 30 mA with overcurrent protection on a B-curve 20 A, single-pole plus neutral, rated to 4.5 kA breaking capacity. The 'WS' designation indicates a neutral-switching variant — the neutral pole opens with the line pole, which matters for circuits where the neutral must be positively disconnected during fault clearing or isolation. The 70 mm depth (D=70MM) fits standard Siemens distribution board cutouts and most European modular enclosures. Type AC detection covers sinusoidal AC residual currents — the common fault type in domestic and light commercial circuits feeding resistive, inductive, or electronic loads without DC components. For circuits with variable-speed drives, UPS, or LED drivers that generate pulsed or DC fault currents, a Type A or Type F RCD would be required instead.","metaTitle":"Siemens 5SU1353-0KV20 FI/LS Protector, AC, 30mA, 4.5kA, B 20","metaDescription":"Siemens 5SU1353-0KV20 FI/LS protector, Type AC, 30mA, 4.5kA, 1+N-pole B 20A. Current lifecycle stage. Sourced to order. Request a quote.","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=437803&mlfb=5SU1353-0KV20","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SU1353-0KV20/alternatives.json"},"ai":{"faq":[{"question":"What is 5SU1353-0KV20 used for?","answer":"The 5SU1353-0KV20 is a combined RCD/MCB (FI/LS protector) for final circuits requiring both 30 mA earth leakage protection and B-curve overcurrent protection up to 20 A, typically in residential or commercial distribution boards."},{"question":"What does Type AC mean on this RCBO?","answer":"Type AC means the residual current detection is sensitive only to sinusoidal AC fault currents. It is the standard type for circuits without non-sinusoidal or DC fault components."},{"question":"Where can I buy 5SU1353-0KV20?","answer":"This part is 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/5SU1353-0KV20","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/5SU1353-0KV20 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}}