{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SU1653-6KV40","brand":"Siemens","brandSlug":"siemens","productSlug":"5SU1653-6KV40","canonicalUrl":"https://aoctrl.com/siemens/5SU1653-6KV40","factsUrl":"https://aoctrl.com/api/mcp/products/5SU1653-6KV40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 5SU1653-6KV40, FI/LS-PROTECTOR TYPE A (PSE/SSF), D=70MM IFN 300MA, 4.5KA, 1+N-POL B 40A.","salesMarkdown":"The Siemens 5SU1653-6KV40 is a combined residual current device and miniature circuit breaker — an RCBO — in a single 1+N-POL module. The 300 mA residual sensitivity is sized for fire protection rather than personal shock protection — it will not catch a 30 mA body-contact fault, but it prevents cable insulation deterioration from becoming a fire risk in distribution circuits. The 70 mm depth (D=70MM) fits standard distribution boards; the 1+N-POL form factor occupies one modular width for the live pole plus a switched neutral, which is typical for single-phase final circuits in TN-S or TN-C-S systems. Snap it onto DIN rail in the enclosure. For a BOM freeze or critical-spare holding, the 5SU1653-6KV40 is available to order. No need to stockpile against an EOL — but if you are maintaining a legacy panel that already has this exact code, keeping one in the cabinet is cheap insurance before a failure.","metaTitle":"Siemens 5SU1653-6KV40 RCBO Type A, 40A 300mA 4.5kA","metaDescription":"Siemens 5SU1653-6KV40 FI/LS protector, Type A, 40A B-curve, 300mA residual, 4.5kA breaking capacity. Current production. Quoted 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=428768&mlfb=5SU1653-6KV40","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SU1653-6KV40/alternatives.json"},"ai":{"faq":[{"question":"What does the Type A and 300 mA rating mean for my circuit?","answer":"Type A detects both sinusoidal AC and pulsating DC residual currents, which makes it suitable for circuits with rectifiers or switching power supplies. The 300 mA sensitivity is a fire-protection threshold, not a personal-protection threshold — it allows a higher leakage before tripping, so it is used on distribution or submain circuits where 30 mA would nuisance-trip."},{"question":"Where can I buy the 5SU1653-6KV40 and get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Submit a request; 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/5SU1653-6KV40","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/5SU1653-6KV40 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}}