Overview
The TB Woods WDB411 is a dynamic brake resistor designed for 460V AC industrial motor control systems. With a 48-ohm resistance value, 800W continuous rating, and 11 kW peak capacity, this unit dissipates kinetic energy to provide controlled deceleration of AC induction motors. Though discontinued by the manufacturer, the WDB411 remains a field-proven choice for retrofit and replacement applications where reliable braking performance is critical.
Key Features
- 48-ohm resistance for precise energy management
- 800W average power / 11 kW peak capacity
- Rated for 460V AC three-phase systems
- Compact modular design supports parallel connection for higher-capacity applications
- Proven reliability in crane, hoist, and conveyor systems
- Discontinued by manufacturer; limited availability through authorized surplus channels
Technical Specifications
- Resistance: 48 ohms
- Average Power Rating: 800W
- Peak Power Rating: 11 kW
- Input Voltage: 460V AC (three-phase)
- Part Number: WDB411
- Manufacturer: TB Woods
- Status: Discontinued by manufacturer
Typical Applications
The WDB411 excels in heavy-duty industrial motor control where rapid deceleration and load holding are safety requirements. Common deployments include:
- Cranes and hoists requiring emergency braking
- Conveyor systems with reversible or variable-speed drives
- Industrial machinery requiring controlled stop capability
- Lift and material-handling equipment
Compatibility & Replacements
Compatible With
- 460V AC three-phase motor control systems
- WFCHT series inverters (460V models)
- Variable frequency drives (VFDs) with external dynamic braking
- AC induction motor deceleration circuits
- Parallel-connected WDB series units for higher horsepower ratings
Replaces / Drop-In Replacement For
The WDB411 is a direct replacement for other discontinued TB Woods WDB411 units and equivalent 48-ohm, 800W resistor units from the same era. Verify that your system inverter/drive supports external dynamic brake connection before installation.
Works With
- TB Woods and Danfoss Vacon drive systems
- 460V three-phase motor control cabinets
- Industrial automation motion control networks
- Legacy and modern dynamic braking architectures
