{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"HC-KFS43B-S9","brand":"Mitsubishi Electric","brandSlug":"mitsubishi","productSlug":"HC-KFS43B-S9","canonicalUrl":"https://aoctrl.com/mitsubishi/HC-KFS43B-S9","factsUrl":"https://aoctrl.com/api/mcp/products/HC-KFS43B-S9","rawCanonicalId":null},"summary":{"shortDescription":"Mitsubishi HC-KFS43B-S9 AC Servo Motor, spring-loaded safety brake, 24V DC, 7.9 W, encoder 131072 pulse/rev, 20000 braking cycles.","salesMarkdown":"The Mitsubishi HC-KFS43B-S9 is an AC servo motor fitted with a spring-loaded safety brake, rated for 24V DC operation and drawing 7.9 W. The brake engages on power loss, holding the motor shaft stationary — critical for vertical-axis loads or any axis where a coast-down would cause a crash. Encoder resolution is 131072 pulses per revolution, supporting both absolute and incremental position feedback. The 20000-cycle brake life means this motor is sized for applications with moderate hold-cycle counts — think a pick-and-place Z-axis or a tool-changer spindle lock, not a high-cycle clamp station where the brake cycles every few seconds. Brake looseness at the shaft is specified at 0.12 to 1.2 degrees, which is typical for a spring-set brake; if your position tolerance after stop is tighter than that, the brake alone won't hold it — you need the servo loop to park the shaft before the brake sets. ## Integration notes The 24V DC brake coil is separate from the motor power windings — wire it through a dedicated safety relay or contactor that drops out on E-stop. The encoder output is a standard A/B/Z incremental plus absolute position data; check your drive's encoder input compatibility for 131072 ppr resolution. Rated voltage is 24V DC; verify your brake supply is regulated — a rectified AC supply without filtering can cause chatter.","metaTitle":"Mitsubishi HC-KFS43B-S9 AC Servo Motor, Spring-Loaded Brake,","metaDescription":"Mitsubishi HC-KFS43B-S9 AC servo motor with spring-loaded safety brake, 24V DC, 7.9W, encoder 131072 ppr. End-of-life hot — source to order via RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Servo Motors with Brake"],"specifications":{"Type":"Spring-loaded safety brake","Product No":"HC-KFS43B-S9","Manufacturer":"Mitsubishi Electric","Product Type":"AC Servo Motor","Rated voltage":"24V DC","Shipping Weight":"5kg","lifecycle_stage":"eol_hot","Release delay time":"0.1","Estimated Lead Time":"Usually ships in 1 - 10 working days.","Power consumption [W]":"7.9","Speed/position detector":"Encoder common to absolute position and incremental detection systems (Resolution per servo motor 1 rotation : 131072 pulse/rev)","Number of braking cycles (times)":"20000","Brake looseness at servo motor shaft (degrees)":"0.12 to 1.2"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$695.00","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/HC-KFS43B-S9/alternatives.json"},"ai":{"faq":[{"question":"What is the brake type on this motor?","answer":"It is a spring-loaded safety brake, rated for 24V DC, 7.9 W power consumption, with a release delay of 0.1 seconds and a rated life of 20000 cycles."},{"question":"What encoder does the HC-KFS43B-S9 use?","answer":"It uses an encoder common to absolute and incremental detection systems, with a resolution of 131072 pulses per revolution."},{"question":"How do I source this part now that it's EOL?","answer":"Through independent distributor or broker channels. Submit an RFQ with your target quantity; availability is limited to existing surplus stock."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/mitsubishi/HC-KFS43B-S9","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/mitsubishi/HC-KFS43B-S9 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}}