{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SU1656-0KV20","brand":"Siemens","brandSlug":"siemens","productSlug":"5SU1656-0KV20","canonicalUrl":"https://aoctrl.com/siemens/5SU1656-0KV20","factsUrl":"https://aoctrl.com/api/mcp/products/5SU1656-0KV20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 5SU1656-0KV20 FI/LS protector, Type AC (WS), 300mA residual current, 6kA breaking capacity, 1+N-pole, B-curve 20A.","salesMarkdown":"The Siemens 5SU1656-0KV20 is a combined residual-current device and miniature circuit breaker — an FI/LS protector — in a single 1+N-pole module. It combines Type AC residual-current detection at 300 mA with a B-curve thermal-magnetic overcurrent trip set at 20 A, all rated for a 6 kA breaking capacity. That means one unit handles both earth-leakage and short-circuit protection in a final subcircuit, saving a DIN-rail slot over separate RCD and MCB devices. This is a DIN-rail-mounted protector sized for distribution boards and sub-distribution panels in residential, commercial, or light-industrial installations. The 70 mm depth (D=70MM) fits standard enclosure depths without crowding the gland plate. The Type AC detection handles sinusoidal AC residual currents — the common case for lighting, socket outlets, and general-purpose circuits without electronic loads that generate pulsed or DC fault currents. The 300 mA residual-current threshold is a fire-protection level, not a personnel-protection level. It is specified where the circuit serves fixed equipment with some natural leakage.","metaTitle":"Siemens 5SU1656-0KV20 FI/LS Protector, Type AC 300mA 6kA B 2","metaDescription":"Siemens 5SU1656-0KV20 FI/LS protector, Type AC, 300mA residual, 6kA breaking capacity, 1+N-pole B-curve 20A. Current production. Sourced 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=387558&mlfb=5SU1656-0KV20","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SU1656-0KV20/alternatives.json"},"ai":{"faq":[{"question":"What is the 5SU1656-0KV20's rated residual current and breaking capacity?","answer":"It has a 300 mA Type AC residual-current detection and a 6 kA breaking capacity, with a 1+N-pole B-curve overcurrent trip set at 20 A."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SU1656-0KV20","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/5SU1656-0KV20 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}}