UMI-S0063 Unitronics UMI 37kW Brk Res. 6kW, 480V

Why Choose the Unitronics UMI-S0063 Braking Resistor?

The Unitronics UMI-S0063 is a high-capacity dynamic braking resistor engineered for use with compatible Unitronics variable frequency drives (VFDs). Designed to dissipate regenerative energy generated during motor deceleration, it helps improve braking performance, protect drive electronics and prevent DC bus overvoltage faults in demanding industrial applications.

During rapid motor deceleration, excess energy is returned to the drive's DC bus. The UMI-S0063 safely converts this energy into heat, allowing the drive to maintain stable operation while delivering faster and more controlled stopping performance. This makes it particularly suitable for heavy-duty industrial machinery, material handling equipment and automation systems requiring rapid stopping and precise motor control.

Designed for 480 V AC three-phase systems, the UMI-S0063 features a 6 kW braking power rating, a 13.6 Ω resistance value and is suitable for applications using drives rated up to 37 kW (50 HP). Its industrial-grade construction ensures dependable operation in demanding manufacturing and process control environments.

Key Advantages

• Improves dynamic braking performance in VFD applications.
• Helps prevent DC bus overvoltage conditions during deceleration.
• 6 kW braking power rating for efficient energy dissipation.
• Compatible with 480 V AC three-phase systems.
• Suitable for drives rated up to 37 kW / 50 HP.
• Industrial-grade design for reliable long-term operation.

Key Features

• Unitronics UMI braking resistor series.
• 6 kW braking power.
• 37 kW (50 HP) drive compatibility.
• 13.6 Ω resistance value.
• 480 V AC three-phase operation.
• Designed for regenerative energy dissipation.
• Suitable for high-inertia applications.
• Industrial installation design.

Reliable Dynamic Braking for High-Power Drive Systems

Braking resistors are essential components in variable frequency drive systems where motors frequently decelerate. During braking, regenerative energy is returned to the drive DC bus. The UMI-S0063 safely dissipates this excess energy, helping maintain stable drive operation while enabling faster and more controlled stopping performance.

This improves machine productivity, protects drive electronics and enhances operational safety in applications requiring rapid speed changes, frequent stopping cycles or precise motor control.

Typical Applications

• Conveyor and material handling systems.
• Hoists, cranes and lifting equipment.
• Packaging and production machinery.
• Industrial fans and pumps.
• Machine tools and automation equipment.
• OEM machinery and manufacturing systems.