Product Description:

The 04.91.020-CE07 is a compact industrial rectifier produced by KEB for its COMBITRON Rectifiers series. Used inside control cabinets, the device converts alternating mains power into direct current for spring-applied brakes, clutches, or other DC-excited loads, ensuring clean disengagement and engagement in motion systems. Its space-saving profile permits installation on DIN rails or terminal boards close to contactors and relays, simplifying wiring runs in machine tools, conveyors, and general factory automation.

The rectifier accepts line voltages up to CE 500 VAC – UL 240 VAC and functions correctly on supplies at 50/60 Hz within a ±2 % tolerance. Internally, a full-wave bridge and suppression network enable bidirectional control, while the stated switching capability supports AC/DC excitation so a single module can energize or quench magnetic loads. Thermal ratings are tied to enclosure temperature: it provides a continuous output of 2.0 A when ambient is 45 °C, but only 1.0 A can be maintained once the cabinet reaches 80 °C. Protection against accidental contact is afforded by an IP20 housing that still allows convection cooling.

Installation is uncomplicated because the terminals must be fastened with a torque of 0.5 Nm to secure vibration-prone machinery. The environmental rating follows IEC climatic category 3K3, indicating suitability for control rooms with elevated humidity and dust but without condensation. Physical dimensions—46 mm width, 28 mm height, and 18 mm depth—permit stacking next to other COMBITRON modules without blocking airflow. Combined with a full-wave topology and screw clamp connections, the unit offers predictable power dissipation across ambient ranges while keeping clearance distances inside slim metal enclosures, making it well suited for tight panel layouts.