Product Description:

The 04.91.010-0007 is a rectifier module manufactured by KEB for the COMBITRON Rectifiers series. Classified as a Combitron rectifier, it changes alternating supply voltage into controlled direct current for engaging and releasing electromagnetic brakes within automated drives and hoists. This makes it suitable for brake control circuits that require predictable DC output from an AC source. Its small panel footprint allows it to sit close to contactors, so brake circuits remain simple and responsive. Its lightweight construction also makes it easier to place in existing cabinets where space is limited.

The unit uses half-wave rectification, providing a single-diode path that limits inrush while maintaining reliable brake torque. Physical dimensions of 17 mm in depth, 25 mm in height, and 37 mm in width let it fit between adjacent terminal blocks without obstructing ventilation. An enclosure rated at IP20 keeps live conductors finger-safe inside a standard control cabinet. Climatic category 3K3 means it can operate in the moderate temperature and humidity conditions typically found in enclosed industrial panels. Because the rectifier has no moving parts, the slim housing supports passive heat dissipation through the molded body during normal operation.

For installation, 3.5 mm fixing holes spaced 31 mm apart accept M3 hardware for quick mounting. Spring terminals accommodate wires from 1.2–2 mm², and each terminal is tightened to 0.4 Nm. Adjacent conductors should remain 9.5 mm away to preserve insulation distances, and the terminal layout supports neat wiring in narrow control sections. The rating of CE 500 VAC - UL 240 VAC allows use on both 50 Hz and 60 Hz mains without tap changes. The module also helps keep the brake circuit separated from sensitive control wiring.