0.4 kW, 3000 rpm, with brake — what this servo delivers
The HC-KFS43 is a 0.4 kW Mitsubishi Electric servo motor from the HC-KFS Series, rated for 2.3 A continuous and 6.9 A peak. It spins at 3000 r/min rated, 4500 r/min max, with a permissible instantaneous ceiling of 5175 r/min — the margin above max speed is the overshoot budget the drive must manage during deceleration. The electromagnetic brake holds the load at rest when power is removed — critical for vertical-axis applications on pick-and-place or gantry stages where a coasting load would drop. Encoder resolution is 131072 pulses per revolution, which at 3000 rpm gives the drive 6.55 million position increments per second to close the velocity and position loops. The power rate at continuous rated torque is 36.7 kW/s — a measure of how fast the motor can accelerate its own rotor inertia, relevant for cycle-time budgeting in high-throughput indexing.
End-of-life sourcing — what that means for your BOM
Sourcing is through independent surplus and inventory channels. Each unit is confirmed available at quote time — no blanket stock claim. If your line depends on this MPN, securing a last-time buy quantity or qualifying a migration path to the current series is the prudent move. The HC-KFS43 is a legacy BOM line; plan for a motor-and-drive pairing update when spares run dry.