The SMC LEJS40T6A-300B is a high-performance electric actuator from the LEJS Series, designed for applications requiring precision and reliability. This actuator features a high rigidity slider type ball screw drive, powered by an AC servo motor that is compatible with the LECS-T Series Driver. Its low-profile design reduces the height dimension by approximately 36%, enhancing stability with a lower center of gravity. The actuator can handle a maximum workload of 85 kg and offers exceptional positioning repeatability of ±0.02 mm, ensuring precise operations. It boasts a maximum acceleration/deceleration of 20000 mm/S², making it suitable for high-speed applications. Additionally, the clean specification complies with ISO Class 4 (Class 10) standards, ensuring suitability for cleanroom environments (11-LEJS only). Compatible with a range of drivers, including LECSA, LECSB(-T), LECSC(-T), LECSS, LECSS-T, LECSN-T, LECY, and several discontinued models, this actuator is versatile and adaptable to various industrial needs.