RZW03.1-045-025

The Bosch Rexroth Indramat RZW03.1-045-025 from the RZW Braking Resistors series is built for demanding industrial automation applications and features a robust Galvanized steel plate housing. This fixed resistor design is specified as a Fixed resistor, delivering a Power Class: 45 kW continuous dissipation and a Peak Power: 40 kW rating for transient braking energy. Its compact footprint of Dimension (width): 795 mm, Dimension (height): 770 mm, and Dimension (depth): 395 mm ensures efficient rack or cabinet integration without sacrificing thermal performance. The component is validated to an IP 23 protection class, offering ingress protection against solid objects larger than 12.5 mm and angled water spray according to IEC 60529.

Thermal management is optimized with a Thermal Time Constant: 150s, meaning the resistor takes 150 seconds to reach 63.2% of its equilibrium temperature after a power step. The element’s Resistance (ohms): 6.0 and Minimum Connectable Resistance Value: 6 ensure predictable current flow and braking torque under varying load conditions. Start-up profiles are accommodated by a Switch-on Duration: 6% to 60%, which regulates the allowable duty cycle during power application, while ambient considerations are addressed by a Maximum Operating Temperature: 40°C. Free air cooling is required, following the Supply Air Guidelines: Free from aggressive or conducting gases, to maintain peak performance and avoid accelerated corrosion within the galvanized enclosure.

Weighing 51 kg, the RZW03.1-045-025 delivers a balance of high power handling and mechanical stability for long service life in harsh environments. Its consistent electrical characteristics and rugged construction make it ideal for high-inertia motor braking, regenerative energy absorption, and safety circuits in industrial machinery. This resistor provides reliable deceleration control and energy dissipation essential for precision automation and protection of drive components.