HLL05.1F-04M0-S0202-N-D7-01U2-NNNN Bosch Rexroth Indramat
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The Bosch Rexroth Indramat HLL05.1F-04M0-S0202-N-D7-01U2-NNNN is part of the HLL Bus Chokes series and features liquid cooling with a weight of 23 kg. It offers a nominal current of 202 Amps, nominal DC bus voltage of 750 V, and a nominal inductance of 4 mH. The bus choke has a power dissipation of 230 Watts to air and 400 Watts to water, with an IP00 protection rating.
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Product Description:
The HLL05.1F-04M0-S0202-N-D7-01U2-NNNN is a bus choke manufactured by Bosch Rexroth Indramat and supplied within the HLL Bus Chokes series. As a current-smoothing element for the DC link of drive systems, the unit reduces ripple and limits peak currents that can damage power semiconductors. Installing this choke between the rectifier and the inverter improves electromagnetic compatibility and extends component life in industrial automation cells.
Its nominal inductance is 4 mH, a value selected to attenuate high-frequency harmonics without introducing excessive voltage drop on the link. The choke supports a continuous load of 202 A at a rated DC bus of DC 750 V, aligning with converters in the 400 to 480 V class. When natural convection is used, heat losses to ambient air reach 230 W; with the integrated cooling channels connected to a water circuit, dissipation rises to 400 W, allowing the choke to remain inside tightly sealed cabinets. Current-compensated windings cancel common-mode noise while maintaining the intended magnetic energy storage. At 23 kg, the assembly can be mounted on a panel or within a liquid-cooled power module frame.
The bus bars are uninsulated, so the degree of protection is IP00 and the device must be fitted behind a cover to meet touch-safe requirements. An embedded thermal contact opens at 160 °C; the sensor is wired in N/C format and handles a switching current of 1 A at up to 250 V AC or 24 V DC, giving the drive controller a simple way to trigger a shutdown if coil temperature rises above its limit. Liquid cooling channels circulate through the copper conductors and core laminations to stabilize temperature swings and keep insulation within its operating range. Because the construction is current-compensated, magnetostrictive noise stays low even near the nominal current limit.
