KB402TXX Sanyo Denki
Wake Industrial LLC is not an authorized distributor of this product.
The Sanyo Denki KB402TXX is a servo motor from the K SANMOTION Servo Motors series with a flange size of 42 millimeters square and a mass of 0.34 kilograms. It offers a rated output of 23 Watts, a rated speed of 3000 min^-1, and a rated torque of 0.074 Newton meters. This motor has an armature resistance of 3.2 Ohms and a rated armature voltage of 20 Volts.
Internal Product Review
The KB402TXX is a Sanyo Denki K SANMOTION servo motor with a 23 W rated output and 3000 min^-1 rated speed. Low rotor inertia of 0.047 x10^-4 kg·m² and 0.074 N·m rated torque give the unit crisp acceleration and dependable positioning in compact motion axes. A very well-balanced servo motor for applications that value responsive performance and stable control.
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Product Description:
The KB402TXX is a servo motor produced by Sanyo Denki and supplied through the K SANMOTION Servo Motors series. This low-power unit converts drive current into controlled rotary motion for positioning valves, indexing small pick-and-place heads, or following tension setpoints on light web lines. Its compact 42 mm frame allows direct integration into machines where space is limited. The motor’s tachogenerator provides speed feedback to the drive for closed-loop regulation in industrial automation applications.
The armature winding has an inductance of 0.9 mH and a resistance of 3.2 Ω, so current rise is limited enough to smooth drive pulses while still supporting quick torque buildup. A rated armature voltage of 20 V supports a continuous shaft output of 23 W. At the rated voltage, the rotor reaches 3000 rpm, and the voltage constant of 4.9 × 10⁻³ V/rpm indicates the back electromotive force generated in relation to speed. The electrical time constant is 0.28 ms, meaning current in the armature settles rapidly after a change in command. The minimum load resistance of 10 kΩ prevents the control circuit from placing an excessive load on the tachogenerator. A tacho coil resistance of 37 Ω establishes the feedback loop impedance for speed measurement.
The shaft provides a continuous torque of 0.074 N·m, based on a torque constant of 0.047 N·m/A. Rotor inertia is 0.047 × 10⁻⁴ kg·m², which keeps acceleration demands moderate during changes in direction. Dynamic response is characterized by a mechanical time constant of 6.9 ms, supporting short-stroke, high-cycle motion. The square flange measures 42 mm on each side, allowing installation with many NEMA 17-sized mounting brackets. The motor weighs 0.34 kg, minimizing the supported mass on small linear slides or belt-driven stages.
