Product Description:

The RZK01.1-400-BW is a heat exchanger module from Bosch Rexroth Indramat's RZK Heat Exchangers series. Installed on the outside of a control cabinet, the unit transfers thermal energy from the panel interior to ambient air so drives and inverters remain within their permitted temperature range. In automated lines, it helps keep electronics below thermal limits and reduce unplanned machine stops.

This model delivers a cooling capacity of 2 × 5 kW, meaning each of its two internal circuits can remove five kilowatts of waste heat under rated conditions. The housing carries a protection class of IP20, so it helps prevent accidental contact with live conductors and is intended for clean indoor areas. For rapid load surges, it can absorb up to 2 × 370 kW for 0.1 seconds, providing short-term overload handling during braking or inrush events. Its resistor assemblies have a combined resistance of 2 × 1.6 Ω, so excess electrical energy is converted into heat for removal by the cooling system. A maximum housing temperature of 80 °C keeps the structure and insulation within an acceptable operating limit during continuous duty.

The continuous removal rate is supported by a nominal power draw of 2 × 2.5 kW, which keeps energy use predictable during normal operation. The exchanger weighs 2 × 23 kg, which is useful to know for mounting and support planning. Thermal response is described by a time constant of 14.3 s, showing how quickly the unit approaches 63% of its final temperature after a sudden load change. To maintain airflow, a top clearance of 200 mm is required so exhaust air can leave the enclosure without recirculation, while NSGAFOU cabling, 4 × 16 mm² brake line conductors, and 2 × 16 mm² ground straps can be routed without blocking the outlet path.