B-404-C-A3 Kollmorgen
Wake Industrial LLC is not an authorized distributor of this product.
Wake Industrial LLC is not an authorized distributor of this product.
The Kollmorgen B-404-C-A3 is part of the Goldline B and BH Motors series and features a rated power of 5400 Watts with a rated speed of 5000 RPM. This motor has a continuous stall torque of 13.1 Newton-meters, a back EMF constant of 40.2 Vrms per kRPM, and operates at a nominal voltage of 230 VAC. Its rotor inertia is 0.000656 kg-m2, with a shaft diameter of 24 mm and a peak stall current of 55.9 Arms.
Internal Product Review
The B-404-C-A3 is a Kollmorgen Goldline servo motor with 5400 W rated power and 5000 RPM rated speed. Continuous stall torque of 13.1 N-m and peak stall torque of 35.3 N-m support strong low-speed output and confident transient loading. A 0.66 N-m/Arms torque constant gives the motor an efficient, well-balanced drive character.
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Product Description:
The B-404-C-A3 is a brushless permanent-magnet servo motor manufactured by Kollmorgen for the Goldline B and BH Motors series. It is intended for use with matched digital drives so that commanded current produces proportional torque for coordinated motion in indexing tables, articulating robots, and high-speed packaging lines. A 24 mm keyed shaft provides mechanical power transfer, and resolver feedback is accommodated by the frame for closed-loop control. Its permanent-magnet design and feedback capability support accurate positioning and stable speed regulation during repetitive industrial motion.
The motor reaches a rated speed of 5000 RPM while sustaining a continuous shaft load of 13.1 N-m; this operating point is held with a continuous stall current of 19.8 Arms. Electrical conversion is tied to a back electromotive force of 40.2 Vrms/kRPM, meaning the drive must furnish proportional voltage as speed rises. A torque constant of 0.66 N-m/Arms links commanded phase current to produced torque, which helps keep drive response predictable. The phase resistance is 0.34 Ω and the inductance is 8.4 mH, values that influence current ripple and servo amplifier response. The windings are rated for 230 VAC line-to-line operation, enabling use with common industrial power systems through a suitable drive.
During acceleration or transient overloads, the rotor can deliver a peak torque of 35.3 N-m with a corresponding peak current of 55.9 Arms. At the nominal operating point, the electromagnetic system converts input power into a mechanical output of 5400 W. Dynamic performance is aided by a rotor inertia of 0.000656 kg-m², which balances quick response with rotational stability. Heat generated in the stator is conducted to the housing with a thermal resistance of 0.38 °C/W, and temperature changes follow a 25-minute thermal time constant so loads can vary without immediate derating. This operating profile suits servo axes that require rapid starts, controlled stops, and short periods of overload without unstable motor behavior.
