RZW02.1-018-006 Bosch Rexroth Indramat
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MPN: R911200632
The Bosch Rexroth Indramat RZW02.1-018-006 is a braking resistor from the RZW Braking Resistors series, featuring a power rating of 18.5 kW and resistance of 18 Ohms. It has an IP20 protection class, weighs 5.2 kilograms, and measures 586 mm wide, 185 mm deep, and 120 mm high. The resistor supports a load cycle of 120 seconds and uses an M6 mounting thread.
Internal Product Review
The RZW02.1-018-006 is a Bosch Rexroth Indramat RZW braking resistor with 18.5 kW power data and 18 Ω resistance. A 120 s load cycle and 6% SD operating factor support controlled energy dissipation during dynamic braking events. IP20 protection and a 300 s thermal time constant make this unit a dependable choice for well-managed cabinet installations.
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Product Description:
The RZW02.1-018-006 braking resistor is manufactured by Bosch Rexroth Indramat as part of the RZW Braking Resistors series. Designed for regenerative servo and inverter systems, this component connects across the DC link and converts surplus electrical energy into heat so the drive can decelerate motors quickly without causing an overvoltage fault. The unit serves as a dedicated thermal load inside control cabinets, allowing repeatable electronic braking while helping control DC-bus voltage during motor deceleration. Its mechanical outline supports horizontal installation near the power stage and accommodates the grounding conductors commonly used in multi-axis machines.
The resistor element provides a fixed resistance of 18 Ω, allowing it to absorb braking current while keeping the DC bus below its trip threshold. Under the specified duty cycle, it can dissipate up to 18.5 kW of peak power. The operating factor is 6% SD, so the average energy over the 120-second load cycle must not exceed the permitted fraction of the peak level. Within each cycle, the device may conduct for a maximum of 7.2 s. This operating period must be followed by 112.8 s of off-time, which allows the resistor to release accumulated heat before the next braking event. Observing these timing limits protects the resistor element from excessive thermal loading during repetitive indexed motion.
A thermal time constant of 300 s indicates that the housing temperature changes gradually as the resistor absorbs intermittent energy bursts. The perforated casing provides IP20 protection, helping prevent accidental finger contact while permitting natural convection airflow through the enclosure. The package has an overall width of 586 mm, while its depth of 185 mm and height of 120 mm allow installation in relatively shallow panels. A mass of 5.2 kg must be considered when selecting the mounting surface and hardware. Installation is supported by M6 threaded bosses, and a 10 mm² ground lug provides a path for fault current. The surface temperature is limited to 80 °C, so the required spacing and airflow must be maintained around the resistor without obstructing its ventilation openings.
