The SMC LEJSH40S6A-300-R5B11 is a high-performance electric actuator from the LEJS-AC Series, designed for applications requiring precision and durability. This actuator features a high rigidity slider type ball screw drive powered by an AC servo motor, ensuring reliable and efficient operation. Its low-profile design reduces the height dimension by approximately 36%, making it ideal for space-constrained environments. With a maximum work load capacity of 85 kg and positioning repeatability of ±0.02 mm, it delivers exceptional accuracy and stability. The actuator supports a maximum acceleration/deceleration of 20000 mm/S², allowing for rapid and smooth motion. Additionally, it meets clean specifications compliant with ISO Class 4 (Class 10) standards, ensuring suitability for cleanroom applications. Compatible with a range of drivers, including LECSA, LECSB(-T), LECSC(-T), LECSS, LECSS-T, LECSN-T, and LECY, this actuator offers versatile integration options for various industrial setups. Note that some compatible drivers have been discontinued, including LECSB-S, LECSC-S, and LECSS-S.