Product Description:

The 175U3007 braking resistor is supplied by Danfoss within the VLT Brake Resistors series. The component connects to the DC link of a VLT frequency converter and converts regenerated motor energy into heat so the drive can decelerate loads quickly without exceeding the permissible bus voltage. Its role in industrial automation is to provide controlled energy dissipation during stopping or downward motion, keeping drive electronics protected while allowing precise torque commands.

The resistor supports a continuous thermal load of 200 W. When rapid stops are required, it can momentarily absorb 3.05 kW at a 10% duty cycle or 0.75 kW at a 40% duty cycle, covering both light and moderate cyclic braking profiles. The element has a resistance of 270 Ω, limiting fault currents and matching the DC bus of typical VLT inverters. Its aluminum enclosure carries an IP54 rating, providing protection against dust and water splashes encountered in general-purpose control cabinets. The enclosure has an overall length of 251 mm, and a fixed power lead sized at 1.5 mm² simplifies connection to the drive terminals. Thermal monitoring is provided by an embedded bimetal switch with a normally closed contact; the switch handles 2 A at up to 250 V AC through 0.5 mm² signal wires, enabling the drive to trip if excessive body temperature is detected.

The factory-terminated installation cable measures 1000 mm, providing enough reach for mounting on a cabinet backplate while retaining the proper bend radius. The resistor conductors are insulated for 600 V, matching the DC-link voltage range of standard 400 V-class inverters. Overheat protection activates at a set point of 180 °C, ensuring that the braking circuit disconnects before insulation damage occurs. The assembly adds only 0.54 kg to the panel, minimizing the load on DIN rails or angle brackets and helping maintain low vibration mass for mobile or lightweight equipment.