Standard delivery
£8 ex VAT · free over £200UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.
Heavier items may be charged at a weight-based or pallet rate, shown at checkout.
UMI-S0064 Unitronics UMI 45-75kW Brk Res. 12kW, 480V
Unitronics UMI-S0064 braking resistor designed for high-power variable frequency drive applications, featuring 12 kW braking power, 6.8 ohm resistance and compatibility with 400-480 V AC three-phase systems.
£480.48
Why Choose the Unitronics UMI-S0064 Braking Resistor?
The Unitronics UMI-S0064 is a heavy-duty dynamic braking resistor designed for use with compatible Unitronics variable frequency drives (VFDs). Engineered for high-power industrial applications, it safely dissipates regenerative energy generated during motor deceleration, helping improve braking performance, protect drive electronics and prevent DC bus overvoltage faults.
During rapid deceleration, motors act as generators and return excess energy to the drive. The UMI-S0064 converts this regenerative energy into heat, allowing the drive system to maintain stable operation while achieving faster and more controlled stopping performance. This makes it particularly suitable for high-inertia loads and demanding automation systems.
Designed for 480 V AC three-phase systems, the UMI-S0064 features a 12 kW braking power rating, a 6.8 Ω resistance value and is suitable for applications using drives rated from 45 kW to 75 kW (60 HP to 100 HP). Its industrial-grade construction ensures dependable performance in manufacturing, material handling and heavy industrial environments.
Key Advantages
- Improves dynamic braking performance in high-power VFD applications.
- Helps prevent DC bus overvoltage conditions during rapid deceleration.
- 12 kW braking power rating for efficient energy dissipation.
- Compatible with 480 V AC three-phase systems.
- Suitable for drives rated from 45 kW to 75 kW.
- Industrial-grade construction for reliable long-term operation.
Key Features
- Unitronics UMI braking resistor series.
- 12 kW braking power.
- 45-75 kW (60-100 HP) drive compatibility.
- 6.8 Ω resistance value.
- 480 V AC three-phase operation.
- Designed for regenerative energy dissipation.
- Suitable for high-inertia industrial applications.
- Industrial installation design.
Reliable Dynamic Braking for High-Power Drive Systems
Braking resistors are critical components in high-power variable frequency drive systems where motors frequently decelerate under load. During braking, regenerative energy is returned to the drive DC bus. The UMI-S0064 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, high inertia braking or precision motor control.
Typical Applications
- Conveyor and material handling systems.
- Cranes, hoists and lifting equipment.
- Heavy industrial machinery.
- Process automation systems.
- Mining and aggregate equipment.
- OEM machinery and manufacturing systems.
Technical Specifications
Tick the specs you need, then view products that match.
| Coil / Supply Voltage | 400–480 V AC | |
|---|---|---|
| Device Type | Drive / Servo Accessory | |
| Product Series | Unitronics Servo / Drives | |
| Power | 12 kW | |
| Voltage | 480 V | |
| Phase | Three Phase | |
| Product type | Braking resistor | |
| Braking power | 12 kW | |
| Drive power range | 45 kW to 75 kW | |
| Motor rating | 60 HP to 100 HP | |
| Resistance | 6.8 Ω | |
| Supply voltage | 400-480 V AC | |
| Nominal voltage | 480 V AC | |
| Phase compatibility | Three-phase | |
| Dimensions (H × W × D) | Approx. 685 × 410 × 140 mm | |
| Application | Dynamic braking for VFD systems | |
| Mounting | Industrial panel or enclosure installation |
Frequently Asked Questions
What is the Unitronics UMI-S0064 used for?
The UMI-S0064 is a braking resistor used with compatible variable frequency drives to dissipate regenerative energy generated during motor deceleration.
What braking power does the resistor provide?
The resistor provides a 12 kW braking power rating.
What drive size is it suitable for?
The UMI-S0064 is designed for applications using drives rated from 45 kW to 75 kW (60 HP to 100 HP).
What is the resistance value?
The braking resistor has a nominal resistance value of 6.8 Ω.
What supply voltage is supported?
The UMI-S0064 is designed for use with 400-480 V AC three-phase drive systems.
Trusted for Heavy-Duty Drive Braking Applications
Unitronics braking resistors are widely used in industrial automation systems to improve deceleration performance, protect VFDs from overvoltage conditions and enhance machine control during demanding operating cycles.
