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UMI-S0400 Unitronics UMI-B7 Brk Res. 390W for 0.75k 230V & 2.
Unitronics UMI-S0400 dynamic braking resistor with 150 Ohm resistance and 390 W braking power, designed for selected 2.2 kW 400-480 V three-phase variable frequency drive applications.
£22.31
Why Choose the Unitronics UMI-S0400 Braking Resistor?
The Unitronics UMI-S0400 is a high-performance dynamic braking resistor designed for use with compatible Unitronics variable frequency drives (VFDs). Engineered to dissipate regenerative energy generated during motor deceleration, this braking resistor helps improve stopping performance, reduce braking times and enhance overall drive system efficiency in demanding industrial applications.
When motors decelerate rapidly, regenerative energy is returned to the drive's DC bus. The UMI-S0400 safely dissipates this excess energy as heat, helping prevent overvoltage faults and enabling controlled braking performance. This makes it particularly suitable for applications requiring frequent starts, stops or rapid deceleration cycles.
Designed for 400-480 V three-phase drive systems, the UMI-S0400 features a resistance rating of 150 Ω and a braking power rating of 390 W, making it suitable for selected 2.2 kW (3 HP) Unitronics VFD applications.
Key Advantages
- Designed for compatible Unitronics VFD systems.
- Improves motor deceleration performance.
- Helps prevent DC bus overvoltage faults.
- 150 Ω resistance rating.
- 390 W braking power capacity.
- Suitable for demanding industrial automation applications.
Key Features
- Unitronics UMI-S0400 braking resistor.
- Designed for dynamic braking applications.
- 150 Ω resistance value.
- 390 W braking power rating.
- Compatible with selected 400-480 V drives.
- Suitable for 2.2 kW (3 HP) drive applications.
- Industrial-grade construction.
- Supports rapid motor deceleration.
Reliable Dynamic Braking Performance
Dynamic braking resistors play a critical role in variable frequency drive systems by dissipating excess regenerative energy generated when motors decelerate. This allows machinery to stop more quickly and efficiently while protecting the drive from overvoltage conditions.
The UMI-S0400 is ideal for industrial applications where precise stopping, rapid deceleration and improved motion control are required. Its robust industrial design supports long-term operation in demanding automation environments.
Typical Applications
- Conveyor systems.
- Material handling equipment.
- Packaging machinery.
- Industrial hoists and lifting equipment.
- Machine tools.
- General industrial automation systems.
Technical Specifications
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| Product Series | Unitronics Servo / Drives | |
|---|---|---|
| Device Type | Drive / Servo Accessory | |
| Power | 2.2 kW | |
| Voltage | 230 V | |
| Phase | Three Phase | |
| Product type | Dynamic braking resistor | |
| Resistance | 150 Ω | |
| Braking power | 390 W | |
| Input voltage compatibility | 400-480 V AC | |
| Input phases | Three-phase | |
| Compatible drive rating | 2.2 kW | |
| Compatible motor rating | 3 HP | |
| Duty cycle | 10% ED | |
| Application | Dynamic motor braking | |
| Brand | Unitronics |
Frequently Asked Questions
What is the Unitronics UMI-S0400 used for?
The UMI-S0400 is a dynamic braking resistor used to dissipate regenerative energy generated during motor deceleration in VFD applications.
What is the resistance value of the UMI-S0400?
The braking resistor has a resistance rating of 150 Ω.
What is the braking power rating?
The UMI-S0400 provides a braking power capacity of 390 W.
Which drive sizes is it designed for?
The resistor is designed for selected 2.2 kW (3 HP) Unitronics drive applications operating on 400-480 V three-phase supplies.
Why is a braking resistor required?
A braking resistor dissipates excess regenerative energy during motor deceleration, helping prevent overvoltage faults and improving stopping performance.
Trusted for Industrial Motion Control
Unitronics braking resistors are trusted by automation engineers and machine builders to provide reliable dynamic braking performance, improved deceleration control and enhanced protection for industrial drive systems.
