{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SU1356-6KV40","brand":"Siemens","brandSlug":"siemens","productSlug":"5SU1356-6KV40","canonicalUrl":"https://aoctrl.com/siemens/5SU1356-6KV40","factsUrl":"https://aoctrl.com/api/mcp/products/5SU1356-6KV40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 5SU1356-6KV40 FI/LS protector, Type A (PSE/SSF), 40A B-curve, 30mA residual current, 6kA breaking capacity, 1+N-pole, 70mm width.","salesMarkdown":"The Siemens 5SU1356-6KV40 is a combined residual-current and miniature circuit breaker (FI/LS protector) in a single 70 mm wide unit. It integrates Type A residual-current detection at 30 mA with a B-curve overcurrent trip set at 40 A, all rated for a 6 kA breaking capacity. This is the 1+N-pole variant, meaning it switches and protects the phase conductor while the neutral is switched but not protected against overcurrent — standard for single-phase final circuits where neutral protection is not required by local code. The B-curve overcurrent characteristic (40 A rated current, In) means the magnetic trip activates at 3 to 5 times In (120–200 A), suited for resistive and general-purpose loads with moderate inrush — think lighting banks, socket outlets, small heaters. The 70 mm width (4 module spaces) is wider than a standard single-module MCB — account for this in DIN-rail layout and enclosure fill calculations.","metaTitle":"Siemens 5SU1356-6KV40 FI/LS Protector, Type A, 40A B-Curve,","metaDescription":"Siemens 5SU1356-6KV40 FI/LS protector, Type A (PSE/SSF), 40A B-curve, 30mA residual, 6kA breaking capacity. Current lifecycle stage. 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=394876&mlfb=5SU1356-6KV40","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SU1356-6KV40/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy the 5SU1356-6KV40 and get a price?","answer":"The 5SU1356-6KV40 is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What does the description FI/LS-PROTECTOR TYPE A (PSE/SSF), D=70MM IFN 30MA, 6KA, 1+N-POLE B 40A mean?","answer":"It is a combined residual-current device and miniature circuit breaker (FI/LS protector), Type A residual-current detection, 70 mm width, 30 mA rated residual current, 6 kA breaking capacity, 1+N-pole configuration, B-curve overcurrent release at 40 A rated current."},{"question":"What compliance documentation does Siemens provide for the 5SU1356-6KV40?","answer":"Standard Siemens FI/LS protectors in the 5SU1 series carry CE marking, comply with IEC 61009-1 (combined RCD/MCB standard), and are typically RoHS compliant. Specific documentation (declaration of conformity, RoHS/REACH certificates) is available on request at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SU1356-6KV40","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/5SU1356-6KV40 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}}