HLR01.1N-44K0-N03R3-B-007-NNNN Bosch Rexroth Indramat
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MPN: R911325710
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The Bosch Rexroth Indramat HLR01.1N-44K0-N03R3-B-007-NNNN is part of the HLR Brake Resistors series and features a continuous power rating of 44 kW with a peak power of up to 187 kW at 785 VDC. This brake resistor is self-cooled, has an IP23 protection class, and supports free assembly mounting style. It weighs 101 kg and is capable of maximum energy absorption of 3550 kWs.
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Product Description:
The HLR01.1N-44K0-N03R3-B-007-NNNN is a DC-bus brake resistor engineered by Bosch Rexroth Indramat for the HLR Brake Resistors series. The component connects to converter or servo drive units and converts regenerative electrical energy into heat during deceleration cycles, which helps protect power electronics from overvoltage. It is used where controlled braking is required in automated machinery with a shared DC bus.
The unit delivers continuous dissipation of 44 kW, meaning it can convert that amount of electrical power into heat during steady operation without exceeding its temperature range. During short, high-energy stops, it accepts up to 3550 kWs of energy before cooling time is required. Peak power handling reaches 140 kW at a 680 V DC link and rises to 187 kW when the link is 785 V DC, allowing compatibility with common servo drive bus voltages. Cabling uses a conductor cross-section of 50 mm², which helps keep current density within safe limits. Cooling is provided by self-cooling airflow, and the IP23 housing with a free-assembly mounting style supports installation in switchgear cabinets or machine frames. The physical dimensions are 995 mm wide, 770 mm high, and 490 mm deep.
A nominal resistance of 3.3 Ω sets the current drawn from the DC bus during braking. The thermal relay should be adjusted to 115 A so that the circuit disconnects if overheating occurs. Surface temperature may climb to 250 °C under severe load, so adjacent components need suitable clearance and shielding. The steel enclosure weighs 101 kg, which adds thermal mass between successive braking events. The design does not require active fans or liquid cooling, which keeps installation simpler in enclosed electrical assemblies.
Frequently Asked Questions about HLR01.1N-44K0-N03R3-B-007-NNNN:
Q: What is the resistance rating of the HLR01.1N-44K0-N03R3-B-007-NNNN brake resistor?
A: The resistance value for the HLR01.1N-44K0-N03R3-B-007-NNNN brake resistor is 3.3 Ω.
Q: How much continuous power can the HLR01.1N-44K0-N03R3-B-007-NNNN handle?
A: The continuous power rating for this brake resistor is 44 kW.
Q: What is the peak power of the HLR01.1N-44K0-N03R3-B-007-NNNN at 785 VDC?
A: Peak power output at 780 VDC for this model is 187 kW.
Q: How much energy can the HLR01.1N-44K0-N03R3-B-007-NNNN absorb at maximum?
A: Maximum energy absorption for this brake resistor is 3550 kWs.
Q: What type of cooling does the HLR01.1N-44K0-N03R3-B-007-NNNN utilize?
A: The cooling method used for this brake resistor is self-cooling.
