Product Description:

The KB402XXX is a DC brush servo motor produced by Sanyo Denki within the K SANMOTION Servo Motors series. Its 42 mm square frame suits low-power positioning axes that need predictable torque in pick-and-place heads or miniature conveyors. Paired with a dedicated amplifier, it converts commanded current into controlled shaft rotation for closed-loop motion. A keyed output shaft supports direct coupling to gears or pulleys, and the factory-attached 1000 mm lead set simplifies wiring inside a control enclosure.

The KB402XXX delivers a rated mechanical output of 23 W while operating from a nominal armature supply of 20 V. The armature resistance of 3.2 Ω affects steady-state current draw and power dissipation, supporting efficient operation in battery-powered equipment or low-voltage cabinets. Under continuous duty, the motor reaches a rated speed of 3000 rpm and sustains a rated torque of 0.074 N·m. This operating point can be used to select suitable gear stages and feedback devices. An IP43 housing limits dust ingress and water spray, allowing installation in sheltered production areas without additional sealing. Thermal balance is aided by the 0.30 kg aluminum case, which dissipates winding heat into the surrounding air.

For transient loads, the KB402XXX can produce a peak stall torque of 0.42 N·m, while its continuous stall capability is 0.08 N·m, providing reserve torque for rapid indexing without causing thermal overload. Dynamic responsiveness is characterized by a mechanical time constant of 6.9 ms. Combined with a rotor inertia of 0.047 × 10⁻⁴ kg·m², this short time constant allows the drive to achieve commanded speed changes with minimal delay. The motor has a torque constant of 0.047 N·m/A, which supports accurate current-loop tuning in compatible servo amplifiers. A 42 mm square flange with through holes provides a direct mounting interface for miniature gearheads and compact machine assemblies.