RZW02.1-011-025 Bosch Rexroth Indramat
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MPN: R911200027
The Bosch Rexroth Indramat RZW02.1-011-025 is part of the RZW Braking Resistors series and provides a power rating of 11 kW with a peak power of 10 kW. This resistor features a resistance of 23 ohms, IP20 protection, and has dimensions of 490 mm wide by 270 mm high by 300 mm deep. It weighs 9.5 kilograms and is designed with a cable cross-section of 4 mm².
Internal Product Review
The RZW02.1-011-025 is a Bosch Rexroth Indramat RZW braking resistor with 11 kW power data and 23 Ω resistor resistance. IP20 protection and a 25% operating factor support dependable braking performance in controlled industrial cabinets. A 10 kW peak power rating stands out as a strong advantage for intermittent energy dissipation.
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Product Description:
The RZW02.1-011-025 braking resistor is produced by Bosch Rexroth Indramat within the RZW Braking Resistors series. Installed on the DC link of Rexroth drive systems, it converts surplus motor energy into heat so the inverter bus voltage remains within safe limits during deceleration or operation with overhauling loads. By shunting current through a calibrated resistive element, the unit protects power modules and supports controlled braking in automated machinery.
The resistor has a continuous thermal capacity of 11 kW, which is the maximum average dissipation it can sustain. A peak absorption rating of 10 kW accommodates short regenerative bursts before the temperature rises excessively. Its operating factor of 25% SD applies to a 120-second load cycle, permitting conduction for up to 30 s followed by a required cooling period of 90 s. The network has a minimum resistance of 20 Ω, while the cold resistance of 23 Ω establishes the energy conversion behavior at ambient temperature. A reduction factor of 3.2 applies when several units share a common heat sink. This factor helps prevent thermal overstress when connected drives brake simultaneously.
The housing measures 490 mm wide and 300 mm deep, with a height of 270 mm that provides a low-profile footprint for cabinet installation. Its mass of 9.5 kg allows the assembly to be supported by standard control-cabinet rails without additional reinforcement. The enclosure has an IP20 protection rating, so it must be installed inside a ventilated cabinet that prevents accidental contact with live parts. A 4 mm² connection cable carries the expected discharge current, and an M10 mounting thread secures the body to a conductive backplate for heat distribution. The resistor has a thermal time constant of 100 seconds, indicating the rate at which its internal temperature responds to changes in electrical loading. The unit uses a Line 2, Design 1 configuration for integration with compatible Rexroth drive systems.
