RD42.1-5R-026-L/S135

The Bosch Rexroth Indramat RD42.1-5R-026-L/S135 from the RD 500 Drive Controllers series is a regenerative power supply module engineered for industrial drive systems. It delivers a rated output at 3-phase AC 400V of 26 kW and sustains a rated current of 50 A under continuous operation. As a Device Variant Regenerative module, it returns braking energy into the line and features forced air cooling to maintain thermal stability. This compact unit supports seamless DC link integration for REFUdrive inverters and is optimized for three-phase mains at 500 V AC.

In typical operation, the module’s DC bus nominal power of 26 kW is pre-charged via series resistors and an auxiliary contactor, with automatic interruption in case of a fault. It accommodates input voltage variations of ±10% and requires a recommended fuse rating of 63 A for line protection. The power supply sustains a peak current of 75 A (60 s), and at 400 V AC it can briefly deliver a peak output of 40 kW. When supplied with 500 V AC, it provides up to 33 kW rated output and a 50 kW peak output, ensuring robust performance under dynamic load demands.

Designed for global deployment, the RD42.1-5R-026-L/S135 draws a line supply rated current of 45 A with a near-unity power factor and exhibits power losses of approximately 0.8 kW at its rated output. The absence of an integrated brake chopper simplifies the architecture while the regenerative feedback remains active in both standby and run modes. Backed by a one-year warranty, this module delivers reliable, high-efficiency power conversion and regenerative capabilities for demanding automation and drive applications.