The SMC LEJS40S2A-400-S2A2 is a high-performance electric actuator from the LEJS-AC Series, designed with a high rigidity slider type ball screw drive and powered by an AC servo motor. This actuator boasts a low-profile design with a reduced height dimension by approximately 36%, enhancing its low center of gravity. It can handle a maximum workload of 85 kg, ensuring robust performance for demanding applications. With a positioning repeatability of ±0.02 mm, it offers precise and reliable operation. The actuator supports a maximum acceleration/deceleration of 20000 mm/S², making it suitable for high-speed applications. Additionally, it meets clean specifications compliant with ISO Class 4 (Class 10) standards, specifically for the 11-LEJS model. The LEJS40S2A-400-S2A2 is compatible with a range of drivers, including LECSA, LECSB(-T), LECSC(-T), LECSS, LECSS-T, LECSN-T, LECY, and several discontinued models, providing flexibility in integration and operation.