RZW02.1-037-006 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat RZW02.1-037-006 is a braking resistor in the RZW Braking Resistors series with a power rating of 37 kW and resistance of 7.4 Ohms. It features a protection class of IP20, has dimensions of 490 mm width by 300 mm depth by 270 mm height, and weighs 9.5 kg. The resistor supports a maximum on-time of 7.2 seconds and a load cycle of 120 seconds.
Internal Product Review
The RZW02.1-037-006 is a Bosch Rexroth Indramat braking resistor rated for 37 kW with 7.4 Ω resistance. IP20 protection and a 6% operating factor support dependable integration in controlled industrial enclosures. A 120 s load cycle highlights well-balanced thermal behavior for dynamic braking applications.
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Product Description:
The RZW02.1-037-006 braking resistor is built by Bosch Rexroth Indramat for the RZW Braking Resistors series. Installed on the DC link of servo and inverter systems, it converts surplus kinetic energy into heat during rapid deceleration or operation with overhauling loads, preventing bus overvoltage and protecting drive electronics. This passive component is suitable for machine cycles that involve repetitive braking because it offers predictable thermal behavior without adding moving parts or control complexity.
This model can dissipate up to 37 kW during its rated duty cycle, which is the maximum regenerative power the connected drive may return within that cycle. A resistance of 7.4 Ω sets the current drawn from the DC bus at a given voltage, directly influencing braking torque. The unit has a width of 490 mm, a height of 270 mm, and a depth of 300 mm, allowing it to fit on a panel beside line reactors or filters. The housing is rated IP20, providing protection against finger contact for indoor installations. With a thermal time constant of 100 s, the resistor reaches 63% of its final temperature slowly enough for standard panel ventilation to remove heat while supporting successive stops in automated equipment. The unit weighs 9.5 kg, and an M10 threaded insert provides a secure fastening point.
The electrical design maintains a minimum resistance of 7 Ω, ensuring that the current does not exceed the limits of Line 2 wiring, which uses a 10 mm² cross section. An operating factor of 6% SD suits motion profiles in which energy is dissipated during a small portion of each cycle. Within the 120-second load period, the element may conduct for a maximum of 7.2 s and must cool for at least 112.8 s to prevent thermal saturation. The unit has a design designation of 1 and uses a single resistor stack sized for medium-power drives.
