KB402XS0 Sanyo Denki
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The Sanyo Denki KB402XS0 is a servo motor from the K SANMOTION Servo Motors series with a flange size of 42 mm square and a mass of 0.40 kg. It offers a rated output of 23 W, a rated speed of 3000 min-1, and a rated current of 1.8 A. The motor is equipped with a 2000 pulse per revolution encoder and delivers a peak stall torque of 0.42 N·m.
Internal Product Review
The KB402XS0 is a Sanyo Denki K SANMOTION servo motor with 23 W rated output and 3000 min-1 rated speed, offering well-balanced performance for light-duty motion axes. A 2000 P/R encoder with line driver output supports clean feedback and dependable positioning response. Peak stall torque of 0.42 N·m gives the motor impressive short-duration servo performance.
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Product Description:
The KB402XS0 is a brushless servo motor built by Sanyo Denki within the K SANMOTION Servo Motors series. Its miniature square-frame construction lets it integrate into pick-and-place heads, index tables, and small actuators that demand precise positioning. In industrial automation, the motor receives commanded current from a servo amplifier, converts it into proportional torque, and feeds back the rotor angle so the controller can close the position loop with millisecond accuracy. Its electrical design targets low-voltage control systems used in semiconductor tools and compact conveyance modules.
At the rated operating point, a supply of 20 V is applied to the stator windings. Under this condition, a phase current of 1.8 A is required, and the motor outputs 23 W of mechanical power. The continuous operating point delivers 0.074 N·m of shaft torque while maintaining a speed of 3000 rpm. With a torque constant of 0.047 N·m/A, the drive can estimate the load through current monitoring. The low rotor inertia of 0.047 × 10⁻⁴ kg·m² minimizes overshoot during rapid reversals. Copper loss stays limited at this power level, supporting continuous duty in confined enclosures.
During acceleration, the shaft can reach a peak stall torque of 0.42 N·m, providing more than five times the continuous torque for short bursts. The drive can command velocities up to 5000 rpm when process cycles require higher throughput. The winding resistance is 3.2 Ω, keeping voltage drop low and preserving servo bandwidth. Mechanical integration is simplified by the square 42 mm flange and a mass of 0.40 kg, which reduces the load on miniature slides. Position feedback is provided by a 2000 P/R incremental encoder powered from a +5 VDC ±5% rail, and its differential line-driver outputs maintain signal integrity. A continuous stall rating of 0.08 N·m supplies thermal margin for static holding applications without a separate brake.
