Product Description:

The HLR01.1N-04K5-N18R0-A-007-NNNN is a dynamic brake resistor produced by Bosch Rexroth Indramat in the HLR Brake Resistors series. It is used alongside Rexroth drive controllers to turn surplus kinetic energy from decelerating motors into heat instead of returning it to the DC link during repeated braking events. By presenting a precisely matched resistive load, the unit protects the power electronics from overvoltage during rapid stops or positioning cycles common in automated machinery. Because the device is passive, it does not interfere with control loops and only needs correct wiring to the chopper circuit.

During braking pulses, the resistor can absorb a continuous thermal load of 4.5 kW without exceeding its design temperature. The resistance value of 20.2 Ω sets the current that flows for a given DC-link voltage and shapes the deceleration profile. An energy capacity of 432 kWs indicates how much energy can be accepted in one event before a cool-down period is required. To protect the ceramic elements, the allowable conduction window is limited to 13 s per braking cycle; exceeding this interval would raise internal temperatures beyond safe limits and shorten service life.

The housing measures 400 mm wide, 490 mm deep, and 270 mm high, so it fits on panel backplates or inside machine frames while still allowing airflow. With a mass of 13 kg, the assembly mounts with standard brackets and does not require an oversized support structure. The enclosure offers enough surface area for convective cooling, and the terminal layout follows the standard arrangement used for this resistor line. Insulation clearances are maintained to support installation in drive cabinets with comparable brake resistor assemblies and standard panel spacing.