RZW02.1-004-060 Bosch Rexroth Indramat
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MPN: R911201096
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The Bosch Rexroth Indramat RZW02.1-004-060 is a 4 kW braking resistor from the RZW Braking Resistors series with a resistance of 47 ohms and an IP20 protection class. This unit measures 586 mm wide, 120 mm high, 275 mm deep, and weighs 7.5 kilograms. It supports a maximum housing surface temperature of 80°C, has a 60% operating factor, and a load cycle of 120 seconds.
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Product Description:
The RZW02.1-004-060 braking resistor is produced by Bosch Rexroth Indramat and belongs to the RZW Braking Resistors series. The unit is assigned to line 2 and design 1 for use with compatible regenerative drive systems. During motor deceleration, it converts excess kinetic energy returned to the DC link into heat. This process helps prevent excessive bus voltage that could interrupt inverter operation or damage power-stage components. The resistor is suitable for industrial automation equipment such as conveyors, packaging machines, and material-handling systems in which repeated braking can return substantial energy to the drive.
This model has a continuous power rating of 4 kW, indicating the thermal load that it can dissipate during operation. Its resistor element has a resistance of 47 Ω, which controls the braking current drawn from the DC bus. During cyclic operation, the housing may remain energized for up to 72 s before requiring a cooling period of 48 s. These operating and cooling periods form a 120-second load cycle with an operating factor of 60% SD. The aluminum fins may reach a surface temperature of 80 °C under permitted operating conditions. Adequate cabinet airflow and clearance are therefore required to keep nearby wiring and components within their allowable temperature limits.
The resistor has a thermal time constant of 300 s, indicating that its body heats and cools gradually as braking energy changes. Its enclosure has an IP20 protection rating, providing protection against finger contact while requiring installation inside a suitable control cabinet. The housing measures 586 mm wide, 275 mm deep, and 120 mm high, allowing its mounting position and required clearances to be planned accurately. With a mass of 7.5 kg, the assembly must be secured to panel supports capable of carrying its weight during normal machine operation. When multiple braking resistors are connected in parallel, the installation must maintain a minimum connectable impedance of 30 Ω. Conductors and terminals must also be sized for the applicable braking current and routed away from hot surfaces to support safe energy dissipation.
