RZW03.1-011-025 Bosch Rexroth Indramat
Wake Industrial LLC is not an authorized distributor of this product.
The Bosch Rexroth Indramat RZW03.1-011-025 is part of the RZW Braking Resistors series and features a power capacity of 11 kW with a resistance of 23 Ohms. Measuring 520 mm in height, 490 mm in depth, and 395 mm in width, this resistor has an IP23 protection class and weighs 26 kilograms. It operates with a surface temperature of 80 degrees Celsius and supports a maximum on-time of 30 seconds with a 25 percent operating factor.
Internal Product Review
The RZW03.1-011-025 is a Bosch Rexroth Indramat RZW braking resistor rated for 11 kW with 23 Ω resistance. IP23 protection and a 25% operating factor make this unit well suited for controlled braking duty in industrial drive systems. A 120 s load cycle with 30 s max on-time supports predictable thermal behavior, making this resistor a strong choice for dependable energy dissipation.
To contact sales for pricing and lead time:
Payment Methods
Shipping Methods
Our Credentials
Product Description:
The RZW03.1-011-025 is a braking resistor produced by Bosch Rexroth Indramat for the RZW Braking Resistors series. Connected to an AC drive’s DC bus, it converts surplus regenerative energy into heat so the drive can decelerate a motor without causing an overvoltage condition. The resistor supports automated axes that undergo frequent braking by providing a controlled path for energy returned from the motor. This function helps prevent excessive DC-bus voltage during rapid deceleration and allows the connected drive to manage regenerative loads safely.
The unit can absorb up to 11 kW of electrical power during each braking event, a value matched to its nominal resistance of 23 Ω. At this resistance, the minimum connectable limit of 20 Ω is respected, ensuring that the drive remains within its allowable current range. The housing carries a protection rating of IP23, so airborne particles larger than 12 mm and falling water at angles up to 60 degrees from vertical will not impair operation. An operating factor of 25% SD permits the resistor to remain energized for one-quarter of the 120-second load cycle before cooling. Heat stored in the resistor elements dissipates with a thermal time constant of 100 s, providing a reference for evaluating temperature changes during repeated braking. Copper cables with cross-sectional areas up to 4 mm² connect to M10 terminals. The frame uses design 1 within the product group.
The permitted energization window consists of a maximum on-time of 30 s followed by an off-time of at least 90 s. This operating pattern keeps the surface temperature from exceeding 80 °C under the stated operating conditions. The assembly measures 520 mm high, 395 mm wide, and 490 mm deep, allowing it to be installed beside standard control cabinets when the required ventilation clearances are maintained. The resistor weighs 26 kg, providing thermal mass that helps absorb heat generated during rapid braking sequences without external cooling hardware. Adequate space around the enclosure allows naturally circulating air to carry stored heat away from the resistor between operating periods.
