SMC 11-LEFS16B-250B-S3 | Clean Room Electric Actuator LEFS Series Ball Screw 16mm Width 250mm Stroke B-Type Motor S3 Configuration

The SMC 11-LEFS16B-250B-S3 is a clean room specification electric actuator from the LEFS series with B-type motor configuration and S3 specification. Part number decoded: LEFS = LEFS series ball screw electric actuator, 16 = 16mm width, B = B-type motor (different from the AA step motor servo — typically a servo motor with different performance characteristics), 250 = 250mm stroke, B = additional specification, S3 = specific configuration option (controller interface, cable, or special mounting).

The B-type motor differentiates this from the AA (step motor servo) variants. The B motor typically provides different torque-speed characteristics, encoder resolution, or controller interface compared to the AA configuration. Selecting between AA and B motor types depends on the application's speed requirements, positioning resolution, duty cycle, and which SMC controller platform is installed in the equipment. The S3 suffix adds a specific configuration that may relate to the controller communication protocol, special cable routing, or mounting modification.

The LEFS16B-250B-S3 provides an alternative motor and configuration to the LEFS16AA-250 at the same 16mm width and 250mm stroke. For the AA step motor servo option, the LEFS16AA-250 provides the standard servo-step motor configuration. For longer stroke with B-type motor, specify LEFS16B-300B with appropriate suffix. Always verify motor type compatibility with your installed SMC controller before ordering, as AA and B motors require different controller configurations. Requires compatible motor controller. Clean series (11-). RoHS compliant.