HLL05.1W-04M0-S0475-N-11-01U2-NNNN Bosch Rexroth Indramat
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MPN: R911377947
The Bosch Rexroth Indramat HLL05.1W-04M0-S0475-N-11-01U2-NNNN is part of the HLL Bus Chokes series and has a current-compensated choke design. It features a rated current of 475 Amps, a nominal DC bus voltage of 1100 V DC, and a protection rating of IP00. The unit is air-cooled and weighs 85 kilograms with an inductance of 1.2 millihenries and 0.8 microfarads leakage capacitance.
Internal Product Review
The HLL05.1W-04M0-S0475-N-11-01U2-NNNN is a Bosch Rexroth Indramat HLL bus choke featuring a current-compensated design and air cooling. Rated for 475 A and 1100 V DC bus operation, the choke appears well suited for demanding drive systems and high-capacity DC bus filtering.
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Product Description:
Bosch Rexroth Indramat manufactures the HLL05.1W-04M0-S0475-N-11-01U2-NNNN, a current-compensated bus choke in the HLL Bus Chokes series. The component connects in the DC link of frequency converters to reduce harmonic content, attenuate line-side disturbances, and protect downstream power electronics. By increasing the impedance of the intermediate circuit, it limits inrush energy and smooths current flow so motor drives can operate within thermal and dielectric limits during continuous duty cycles in presses, packaging machines, and material-handling cells. Its current-compensated winding also suppresses common-mode noise that might otherwise interfere with sensitive control electronics. This makes the choke useful in systems exposed to rapid load changes and inverter switching noise.
Its thermal and magnetic design supports a continuous current of 367 A without saturation, while the silicon-steel core withstands a rated surge of 475 A during transient events such as regenerative braking. An inductance of 1.2 mH provides the impedance needed to filter high-frequency components on a DC bus operating at 1100 V DC. The winding construction has only 0.8 µF of leakage capacitance, so switching spikes are reduced without creating strong resonant peaks. This filtering action helps stabilize current flow through the intermediate circuit during normal operation and short transients. The choke uses ambient air convection for cooling, and its open IP00 frame requires installation inside an enclosed cabinet with forced airflow.
A built-in temperature switch closes at 160 °C to signal overheating before the insulation system is overstressed. The normally closed contact is rated for control circuits at 250 V AC or 24 V DC and can carry up to 1 A, allowing direct connection to drive interlock inputs or a fan controller. The thermal contact can be wired into a shutdown chain so the drive reacts before excessive heat damages the winding. With a mass of 85 kg, the choke must be fixed to a rigid baseplate, and its mass helps slow temperature rise during short overload periods.
