{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SU1356-0KV40","brand":"Siemens","brandSlug":"siemens","productSlug":"5SU1356-0KV40","canonicalUrl":"https://aoctrl.com/siemens/5SU1356-0KV40","factsUrl":"https://aoctrl.com/api/mcp/products/5SU1356-0KV40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 5SU1356-0KV40, FI/LS-PROTECTOR TYPE AC (WS), D=70MM IFN 30MA, 6KA, 1+N-POLE B 40A.","salesMarkdown":"The Siemens 5SU1356-0KV40 is a combined residual-current device and miniature circuit breaker (RCBO) — a single module that does both jobs: 30 mA earth-leakage protection (Type AC, meaning it detects sinusoidal AC fault currents only, not pulsed DC) and overcurrent/short-circuit protection via the B-curve thermal-magnetic trip at 40 A rated current. The 6 kA breaking capacity (per IEC 61009-1) is sized for domestic and light commercial final circuits where the prospective fault current stays under that threshold; in a panel with higher SCCR upstream you'd need a current-limiting upstream MCB or fuse to keep the let-through within 6 kA. ## Deployment context Mounts on standard DIN rail in a distribution board or consumer unit. The 1+N-Pole form factor (switching the line, solid neutral) is the common European final-circuit layout. The 70 mm depth (D=70MM) fits standard enclosures; check gland-plate clearance if the board is shallow.","metaTitle":"Siemens 5SU1356-0KV40 FI/LS Protector, Type AC, 30mA, 6kA, 1","metaDescription":"Siemens 5SU1356-0KV40 FI/LS protector, Type AC, 30mA, 6kA, 1+N-Pole B 40A. 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=280774&mlfb=5SU1356-0KV40","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SU1356-0KV40/alternatives.json"},"ai":{"faq":[{"question":"What is the 5SU1356-0KV40 used for?","answer":"It is a combined RCD/MCB (RCBO) providing 30 mA earth-leakage protection (Type AC) and overcurrent/short-circuit protection (B-curve, 40 A, 6 kA) in a single DIN-rail module for final circuits."},{"question":"Where can I buy the 5SU1356-0KV40?","answer":"It is sourced and quoted to order against an RFQ through independent distribution channels. 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/5SU1356-0KV40","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/5SU1356-0KV40 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}}