{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SU1653-0KV40","brand":"Siemens","brandSlug":"siemens","productSlug":"5SU1653-0KV40","canonicalUrl":"https://aoctrl.com/siemens/5SU1653-0KV40","factsUrl":"https://aoctrl.com/api/mcp/products/5SU1653-0KV40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 5SU1653-0KV40 FI/LS-PROTECTOR TYPE AC (WS), D=70MM IFN 300MA, 4.5KA, 1+N-POL B 40A.","salesMarkdown":"## What this FI/LS protector carries The Siemens 5SU1653-0KV40 is a Type AC residual current device with integrated miniature circuit breaker — an FI/LS combination unit in a 1+N-POL form factor. It combines a 40 A B-curve MCB with a 300 mA RCD, rated for 4.5 kA breaking capacity. The 300 mA sensitivity is sized for fire protection and general equipment protection rather than personal shock protection (which typically requires 30 mA or less). The 70 mm depth (D=70MM) fits standard DIN-rail enclosures with typical gland-plate clearance. The 1+N-POL arrangement occupies a single modular width on the rail, with the neutral pole switched internally. The B-curve trip characteristic (3-5 In) suits resistive and general-purpose loads — lighting, small motor circuits, and control transformers — where inrush is moderate.","metaTitle":"Siemens 5SU1653-0KV40 FI/LS Protector, Type AC, 40A B-Curve,","metaDescription":"Siemens 5SU1653-0KV40 FI/LS combination protector. Type AC, 40A B-curve MCB, 300mA RCD, 4.5kA. 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=440342&mlfb=5SU1653-0KV40","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SU1653-0KV40/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings of 5SU1653-0KV40?","answer":"It is a Type AC FI/LS protector with a 40 A B-curve MCB, 300 mA residual current sensitivity, 4.5 kA breaking capacity, and a 1+N-POL configuration. The 70 mm depth fits standard DIN-rail enclosures."},{"question":"Where can I buy 5SU1653-0KV40?","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 commitment."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SU1653-0KV40","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/5SU1653-0KV40 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}}