Product Description:

The RZW02.1-003-006 braking resistor is produced by Bosch Rexroth Indramat for the RZW Braking Resistors series. This component is wired across the DC bus of a drive controller so that surplus regenerative energy is converted into heat rather than causing bus overvoltage. By providing a controlled dissipation path, the resistor protects inverters, motors, and connected loads during rapid deceleration or the lowering of a vertical axis. It fits into control cabinets that accept IP20 devices and connects through conductors with a 2.5 mm² cross section.

The resistor has a resistance of 68 Ω, which controls the braking current drawn at a given DC bus voltage. Steady thermal loading is supported by a continuous rating of 3 kW, while short energy bursts can be absorbed at a rating of 2.7 kW. These electrical limits correspond to an operating factor of 6% SD, allowing the device to conduct for that proportion of a 120 s duty window without exceeding its permitted internal temperature rise. The IP20 housing supports protected mounting inside a ventilated enclosure while preventing accidental contact with hazardous internal parts. A minimum connection resistance of 30 Ω allows compatible drive diagnostics to identify cabling faults or an unsuitable resistor connection.

Thermal behavior is characterized by a time constant of 300 s, so heat stored during a braking pulse dissipates gradually over approximately five minutes. Under rated cycling, the aluminum body can reach a surface temperature of 80 °C, making suitable clearance from nearby wiring and heat-sensitive components important. With a mass of 1.2 kg and a width of 389 mm, the unit can be attached directly to a suitable DIN rail or panel plate without heavy structural supports. Its remaining dimensions are 75 mm in depth and 87 mm in height, allowing it to share cabinet space with contactors, filters, and fuses while retaining adequate room for cooling airflow.