HNL01.2E-0400-N0051-A-480-NNNN Bosch Rexroth Indramat
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MPN: R911335903
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The Bosch Rexroth Indramat HNL01.2E-0400-N0051-A-480-NNNN is part of the HNL Mains Chokes series and features a nominal inductance of 400 microhenries. It supports a mains connection voltage of 3 x AC 400 to 480 V at 50 or 60 Hz with a nominal current of 51 Amps. The design offers IP10 protection and is suitable for feeding supply systems.
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Product Description:
The HNL01.2E-0400-N0051-A-480-NNNN is a mains choke in the HNL Mains Chokes series produced by Bosch Rexroth Indramat. Placed between the utility supply and drive inverters, this passive component adds line impedance to moderate inrush current, attenuate harmonics, and protect downstream power electronics during switching events in automated machinery. It also helps smooth input conditions for connected drives when several power conversion stages share the same plant supply. By limiting line-side stress, it can reduce the severity of current spikes that would otherwise reach rectifier and capacitor stages at power-up.
This model is designed for a supply of 400–480 V AC three-phase power, allowing it to operate directly on common industrial feeders without an isolation transformer. That arrangement makes it suitable for cabinets where the drive front end is connected directly to plant mains. Under these conditions, the choke carries a nominal current of 51 A, so the copper windings and laminations support continuous operation at that load. The magnetic path is tuned to a nominal inductance of 400 µH, and this reactance influences voltage drop while reducing high-frequency ripple generated by pulse-width-modulated drives. A housing rating of IP10 indicates that the device is open on the cooling sides and must be mounted inside a control cabinet. The supply-side classification is feeding, which shows that the choke is intended for the line side rather than for motor cables or DC bus connections.
The product is in design revision 2 and carries internal series code 01. These identifiers place the unit within a specific product generation and mounting format without changing its stated electrical duty. Compatibility with 50/60 Hz grid frequencies allows use on either common utility standard while maintaining stable inductive behavior and expected thermal performance at rated current. Because it is a passive magnetic component, it operates without active control electronics and works in the incoming power path ahead of the inverter section. The open construction requires cabinet installation with suitable spacing so ambient air can move around the core and windings during operation.
