Product Description:

The HNL05.1R-0045-N0327-N-A4-NNNN is a mains choke manufactured by Bosch Rexroth Indramat for the HNL Mains Chokes series. Installed between a regenerative supply module and the factory power line, this passive component limits harmonic currents and reduces voltage transients before they reach connected drive equipment. It also supports cleaner power flow during regenerative operation, allowing braking energy to return to the grid while helping protect inverters and motors in multi-axis automation systems.

The choke has an inductance of 45 µH, which provides useful impedance for filtering high-frequency content without creating excessive voltage drop at load. It carries a continuous current of 327 A, making it suitable for large drive cabinets with substantial power demand. Thermal losses are rated at 230 W, and the IP00 enclosure means heat must be removed by cabinet airflow rather than by a sealed housing. The unit measures 293 × 252 × 174 mm, which helps when planning panel space and mounting clearances. Operation is permitted at ambient temperatures up to 40 °C, and the choke is intended for regenerative supply applications where stable current handling is required in both motoring and energy-return conditions.

Overtemperature protection is provided by a bimetal switch that trips at 160 °C. When that temperature is reached, the normally closed monitoring contact opens and can interrupt control circuits rated up to 250 V AC, while also supporting 24 V DC signaling at 1 A for status monitoring. With a mass of 21 kg, the unit should be mounted on a rigid plate or rail to reduce vibration stress during operation. Because the monitoring contact uses normally closed logic, the control system can detect an overtemperature condition as soon as the circuit opens, which allows a direct fault signal without adding a separate interposing relay.