ECM-B3M-CP0807SJ1-AC SERVO MOTOR .75KW 3000RPM 4.the B3M-CP0807SJ1-AC ECM Servo motors are strong, 0.75 kW, 3000 RPM motors made for exact torque and speed control. Strongly designed for industrial automation, it provides outstanding performance and dependability, making it ideal for increasing manufacturing lines and intricate gear.