{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SU1656-1KV20","brand":"Siemens","brandSlug":"siemens","productSlug":"5SU1656-1KV20","canonicalUrl":"https://aoctrl.com/siemens/5SU1656-1KV20","factsUrl":"https://aoctrl.com/api/mcp/products/5SU1656-1KV20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 5SU1656-1KV20 FI/LS protector, Type AC (WS), 70mm wide, 300mA residual sensitivity, 6kA breaking capacity, 1+N-pole, C-curve 20A.","salesMarkdown":"The Siemens 5SU1656-1KV20 is an FI/LS combination unit — an RCD and MCB in one 70mm-wide module. The Type AC residual-current detection (300mA IΔn) handles sinusoidal AC fault currents to ground; it's the standard choice for general-purpose socket-outlet circuits where no DC or pulsed DC fault content is expected. The 6kA breaking capacity (IEC 60898) covers most domestic and light-commercial distribution boards fed from a transformer up to that prospective fault level. The C-curve 20A thermal-magnetic trip means it holds inrush from motorized loads (pumps, compressors) up to about 10x rated current, then trips magnetically above that. In a distribution board, it snaps onto the DIN rail and connects via the busbar system. The 1+N-pole configuration switches both line and neutral, with the neutral pole switching but not protected against overcurrent — standard for single-phase final circuits where neutral isolation is required.","metaTitle":"Siemens 5SU1656-1KV20 FI/LS Protector, 20A C, 300mA, 6kA","metaDescription":"Siemens 5SU1656-1KV20 FI/LS combination protector, Type AC, 300mA residual, 6kA breaking capacity, 1+N-pole C 20A. Current lifecycle stage. Quoted 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=439062&mlfb=5SU1656-1KV20","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SU1656-1KV20/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy the 5SU1656-1KV20 and get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm commercial offer."},{"question":"What does the description FI/LS-PROTECTOR TYPE AC (WS), D=70MM IFN 300MA, 6KA, 1+N-POLE C 20A mean?","answer":"It is a combined residual-current device (RCD) and miniature circuit breaker (MCB) — Type AC residual current detection at 300mA, 6kA breaking capacity, 1+N-pole configuration (switched line and neutral), C-curve thermal-magnetic characteristic rated 20A, in a 70mm-wide housing."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SU1656-1KV20","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/5SU1656-1KV20 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}}