RZW03.1-022-025 Bosch Rexroth Indramat
Wake Industrial LLC is not an authorized distributor of this product.
MPN: R911200824
The Bosch Rexroth Indramat RZW03.1-022-025 is part of the RZW Braking Resistors series and has a power rating of 22 kW with a continuous power of 6.25 kW. This resistor features a resistance of 14 ohms and is protected by an IP23 rating. It weighs 36 kg and measures 595 mm wide, 520 mm high, and 490 mm deep.
Internal Product Review
The RZW03.1-022-025 is a Bosch Rexroth Indramat RZW braking resistor rated for 6.25 kW continuous power with 14 Ω resistance. IP23 protection and a 25% operating factor support stable thermal performance in demanding braking circuits. The 22 kW power rating makes this unit a strong choice for dynamic deceleration service.
To contact sales for pricing and lead time:
Payment Methods
Shipping Methods
Our Credentials
Product Description:
The RZW03.1-022-025 is a braking resistor element produced by Bosch Rexroth Indramat for the RZW Braking Resistors series. Installed alongside a frequency converter or servo drive, it dissipates surplus DC-link energy generated when a motor decelerates, preventing overvoltage trips and keeping automated production cells within safe electrical limits. The device is intended for cabinet or frame mounting where forced convection can carry away the released heat. Its enclosure and mounting location must permit unrestricted airflow around the resistor while maintaining suitable separation from heat-sensitive components.
Its continuous thermal load is rated at 6.25 kW, indicating the power that the element can convert into heat indefinitely without exceeding its temperature limits. For short braking peaks, the resistor can accept 22 kW, supporting rapid stops or heavy momentary loads. The base resistance is 14 Ω, and it must be matched to the voltage and current limits of the drive’s braking chopper. A 25% SD operating factor indicates that sizing must account for the ratio of braking time to rest time rather than continuous dissipation alone. The enclosure has an IP23 rating, providing protection against objects larger than 12.5 mm and water sprayed at angles of up to 60 degrees from vertical. Indoor installation should prevent exposure to excessive moisture, conductive dust, and restricted ventilation.
The permitted energizing cycle allows a maximum on-time of 30 seconds, followed by an off-time of 90 seconds. This operating cycle works with the resistor’s 100-second thermal time constant to limit heat accumulation in the winding core. The surface temperature may reach 80 °C, so adequate clearance and airflow are necessary to protect nearby wiring and equipment. With a mass of 36 kg, the steel enclosure requires secure mounting on a structure capable of supporting its weight during operation. Electrical connections use M10 terminals that accept a 10 mm² conductor, providing a robust path for braking current. The housing measures 520 mm high, 595 mm wide, and 490 mm deep, so the installation area must provide sufficient space for the enclosure, conductors, airflow, and terminal access.
