Product Description:

The HLR01.1N-0300-N17R5-A-007-NNNN is a braking resistor manufactured by Bosch Rexroth Indramat for the HLR Brake Resistors series. In a regenerative drive system, it converts excess kinetic energy from a servo axis into heat so the connected inverter is protected from overvoltage. It is installed between the drive controller DC bus and the cabinet ventilation path, where it provides a controlled energy sink during rapid deceleration or emergency stops. It is suited to applications with frequent stopping, reversing, or short deceleration ramps, where regenerated energy would otherwise raise bus voltage.

The resistor can continuously dissipate up to 0.3 kW of electrical power as heat, matching the braking power envelope of mid-range motion axes. Its resistance of 37 Ω limits braking current to a predictable level and keeps the load on the braking circuit within the intended range. A single braking pulse may last only 1 s, and during that interval the unit can absorb 37 kWs of energy from a moderate-inertia load coming to rest. In cyclic duty, the element may remain energized for up to 120 s before a mandatory cool-off interval, which helps keep average winding temperature within insulation limits.

The housing stands 300 mm tall, spans 123 mm in width, and extends to a depth of 196 mm, so it fits beside standard drive controllers without obstructing service clearances. With a mass of 3 kg, the unit adds little static load to DIN rails or backplates, which supports mounting high inside an enclosure where warm air accumulates. The rectangular profile promotes vertical convection paths, and the exposed surfaces help release heat generated during repeated braking cycles. This form factor also makes it easier to place the resistor in cabinets where airflow direction and spacing around heat-producing components must be considered.