RZW03.1-022-006 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat RZW03.1-022-006 is part of the RZW Braking Resistors series and has a power rating of 22 kilowatts with a peak power of 20 kilowatts. This E3 resistor features a resistance of 12 ohms, operates with a protection class of IP23, and weighs 15 kilograms. Its physical dimensions are 480 mm in height, 290 mm in width, and 200 mm in depth.
Internal Product Review
The RZW03.1-022-006 is a Bosch Rexroth Indramat RZW braking resistor engineered for effective energy dissipation with 22 kW power data and 12 Ω resistance. An IP23 protection class and 20 kW peak power make the unit a strong choice for demanding braking circuits and stable thermal performance. A 6% operating factor with a 150 s thermal time constant supports dependable cycling performance.
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Product Description:
The RZW03.1-022-006 belongs to the RZW Braking Resistors series manufactured by Bosch Rexroth Indramat. Intended for regenerative drive systems, this resistor converts excess kinetic energy into heat so DC-bus voltage stays within safe limits during deceleration cycles. In automated machinery, the part protects inverters and motors by providing a predictable discharge path whenever dynamic braking is engaged. It is suited for drive systems that experience repeated braking events and frequent speed changes.
The unit has a continuous power rating of 22 kW and a short-term absorption capacity of 20 kW during high-inertia stops. Service duty is limited to an operating factor of 6% SD, meaning the resistor may conduct for short intervals before a cooling period is required. Each braking cycle may remain energized for a maximum of 7.2 s. The enclosure has a protection class of IP23, allowing installation inside ventilated cabinets while blocking objects larger than 12 mm and falling water drops. Electrical connection to the drive uses 4 mm² cables, and the minimum connectable external resistance is 11.6 Ω, which keeps current within the range expected for the internal 12 Ω element. Mechanical fastening uses Design 1 hardware with an M8 fixing thread, and the resistor type is E3.
Once a duty period finishes, the assembly needs a cooling interval of 112.8 s. Its thermal time constant is 150 s, so stored heat dissipates gradually after the load is removed. The aluminum housing helps spread heat across the resistor body during repeated braking pulses. The housing measures 480 mm in height, 290 mm in width, and 200 mm in depth, providing surface area for natural convection without forced airflow. Total mass is 15 kg, so the mounting surface must support that load. Conductor clearances and the housing geometry maintain spacing suitable for industrial insulation practice.
