RZW03.1-160-040 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat RZW03.1-160-040 is part of the RZW Braking Resistors series and has a peak power of 144 kW with a continuous power rating of 160 kW. This resistor features a parallel connection mode, a line cross-section of 95 mm², and a protection class of IP23. It has a minimum connectable resistance of 2.2 ohms and an operating factor of 40 percent SD.
Internal Product Review
The RZW03.1-160-040 is a Bosch Rexroth Indramat RZW braking resistor with parallel connection mode and IP23 protection. A 120 s load cycle and 40% SD operating factor support steady thermal behavior in repeated deceleration service. The 100 s thermal time constant highlights a well-balanced braking resistor for consistent industrial drive protection.
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Product Description:
The RZW03.1-160-040 braking resistor assembly is produced by Bosch Rexroth Indramat within the RZW Braking Resistors series. It is installed on the DC link of drive converters to absorb surplus kinetic energy whenever a motor decelerates, preventing overvoltage trips and reducing stopping distances in automated production lines. The unit’s F7 resistor elements are arranged in a dual stack and wired in parallel so that the heat load is divided between two identical paths. This arrangement keeps the overall dimensions compatible with standard enclosure layouts while distributing thermal stress across both elements.
The resistor network is rated for continuous power dissipation of 160 kW, which is the maximum thermal load it can carry during steady braking sequences without exceeding material limits. Its short-duty power rating is 144 kW, which applies during brief braking events such as emergency stops or rapid indexing moves. An operating factor of 40% SD permits the resistor to dissipate energy for 40 percent of each duty cycle, leaving the remaining time for cooling. Each energization period is limited to 48 seconds, after which the assembly must be de-energized to remain within its load-cycle rating. A minimum connectable impedance of 2.2 ohms restricts current flow when the resistor is paired with other braking modules, helping protect the DC bus from excessive current.
A thermal time constant of 100 seconds indicates how quickly the housing temperature responds to changes in power dissipation. This value allows the connected drive to estimate when the resistor has cooled enough for another braking event. The enclosure has an IP23 rating, allowing top-entry airflow while protecting against solid objects larger than 12 mm and water spray at angles of up to 60 degrees from vertical. The terminal block accepts power cables with conductor cross sections of up to 95 mm², accommodating the high current associated with the parallel connection. Each resistor bar has an intrinsic resistance of 4.8 ohms, and the two bars operate together in the assembly’s parallel topology.
