RZW02.1-037-040 Bosch Rexroth Indramat
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MPN: R911200030
The Bosch Rexroth Indramat RZW02.1-037-040 is part of the RZW Braking Resistors series and weighs 33 kilograms. It has a rated power of 37 kW, resistance of 8.1 ohms, and an IP20 protection class. The resistor has dimensions of 800 mm depth, 490 mm width, and 270 mm height, with a terminal thread size of M10.
Internal Product Review
The RZW02.1-037-040 is a Bosch Rexroth Indramat RZW braking resistor engineered for controlled energy dissipation at 37 kW with 8.1 Ω resistance. IP20 protection and a 40% operating factor support dependable integration in drive cabinets and repetitive braking duty. A well-balanced choice for demanding deceleration circuits, highlighted by a 2.2 peak-to-continuous ratio.
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Product Description:
The RZW02.1-037-040 is a resistor module manufactured by Bosch Rexroth Indramat within the RZW Braking Resistors series. In a drive system, this component connects across the DC link of an inverter and converts excess electrical energy generated during motor deceleration into heat, keeping the link voltage within safe limits. By providing a dedicated thermal path for that energy, the module protects power electronics and enables rapid braking cycles in industrial automation cells that rely on high-inertia axes.
Its power capability reaches 37 kW, and the element has a cold resistance of 8.1 Ω. The resistor may stay active for 48 s and must then remain idle for 72 s, resulting in a cyclic duty rating of 40% SD. These ratings indicate the load the module can dissipate without exceeding its temperature limits. The line terminals accept conductors up to 25 mm², while the ground connection requires a 10 mm² conductor. A minimum external resistance of 7 Ω must be maintained when multiple units share a drive, and the threaded M10 posts support rigid bus-bar mounting. The unit is part of Line 2 and uses design 1 for compatibility with matching inverters.
The housing measures 270 mm high, 490 mm wide, and 800 mm deep, and it weighs 33 kg. Its peak-to-continuous ratio of 2.2 indicates how much the short-term dissipation can rise above the steady-state limit during abrupt stops. The enclosure has an IP20 protection class, making it suitable for ventilated indoor cabinets where the enclosure prevents finger contact with live parts. A thermal time constant of 100 s causes the internal temperature to respond gradually to load changes, allowing the drive system to estimate resistor heating during repeated braking cycles. Cabinet placement must provide enough space around the housing for unrestricted airflow and heat removal.
