KB404TXX Sanyo Denki
Wake Industrial LLC is not an authorized distributor of this product.
The Sanyo Denki KB404TXX is part of the K SANMOTION Servo Motors series and has a rated output of 40 W with a rated speed of 3000 min-1. This servo motor features a rated armature current of 2.7 A and a rated armature voltage of 24 V. It provides a peak stall torque of 0.76 N·m and weighs 0.49 kg.
Internal Product Review
The KB404TXX is a Sanyo Denki K SANMOTION servo motor rated at 40 W with a rated speed of 3000 min-1. A 24 V rated armature voltage and 2.7 A rated armature current make drive matching straightforward in compact motion systems. Continuous stall torque of 0.14 N·m gives this servo motor very good low-speed control for light-duty precision axes.
To contact sales for pricing and lead time:
Payment Methods
Shipping Methods
Our Credentials
Product Description:
The KB404TXX is a permanent-magnet DC motor produced by Sanyo Denki within the K SANMOTION Servo Motors series. Designed for closed-loop axes in compact assembly machines, it converts low-voltage electrical power into precisely controlled rotary motion. The rotor’s low inertia supports rapid speed changes, enabling pick-and-place arms, electronic component feeders, and miniature conveyors to follow tight motion profiles under servo control. Industrial automation platforms use this unit as the prime mover in small precision actuators where repeatable torque and compatible feedback are essential.
The drive windings accept a nominal supply of 24 V, and the motor draws 2.7 A at its rated operating point. Under rated electrical input, the motor delivers 40 W of output while maintaining a constant speed of 3000 rpm. The laminated rotor has an inertia of 0.084 × 10⁻⁴ kg·m², supporting short acceleration transients and minimizing overshoot. A torque constant of 0.057 N·m/A relates armature current to shaft torque, while a back-EMF voltage constant of 6.0 × 10⁻³ V per rpm supports closed-loop speed regulation. The housing has a mass of 0.49 kg, which places minimal load on compact actuator structures.
During continuous operation, the shaft supplies 0.13 N·m without exceeding its thermal limit, and the magnetic circuit provides a continuous stall torque of 0.14 N·m at the rated temperature. The motor can withstand short overloads of up to 0.76 N·m, providing additional torque for indexing starts or sudden external loads. The armature circuit has a resistance of 1.7 Ω, which limits steady-state current. Its inductance of 0.7 mH affects current rise time and smooths pulse-width modulation from the drive. Integrated tachogenerator terminals require a 10 kΩ load and produce 3 × 10⁻³ V per rpm with a tolerance of ±10%, enabling analog velocity feedback for compatible drive cards.
