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Kollmorgen BDS4A-255J-000
Model Number: BDS4A-255J-000
Product Overview:
The BDS4A-255J-000 is a dynamic braking resistor module rated for 255V AC systems. It is identical in function to the BDS4A-230J-000 but optimized for higher DC bus voltages (up to 325V DC nominal). The “255J” indicates a 255V AC rated variant with different resistance value for higher voltage applications.
Detailed content
Product Category: Dynamic Braking Resistor / Regeneration Module
Model Series: BDS4A
Technical Specifications:
| Parameter | Value |
|---|---|
| Model | BDS4A-255J-000 |
| Type | Dynamic Braking Resistor Module (External) |
| Rated Voltage | 255 V AC (3-phase input) |
| Resistance Value | 30 Ω (±5%) |
| Rated Power | 2.0 kW (continuous) |
| Peak Power (10 sec) | 4.0 kW |
| Braking Torque Contribution | Up to 100% of motor rated torque (at 3000 RPM) |
| Connection | 3-phase input from drive brake output |
| Cooling | Forced air (integral fan) |
| Dimensions (W × H × D) | 150 mm × 200 mm × 120 mm |
| Weight | 5.0 kg |
| Operating Temperature | 0°C to +50°C |
| Protection Rating | IP20 (IP54 with enclosure) |
| Certifications | CE, UL, cUL, RoHS |
Functional Features:
- Same as BDS4A-230J-000 with higher voltage/power rating
- 30 Ω resistance — optimized for 325V DC bus systems
- Higher power dissipation (2.0 kW continuous) — suitable for larger drives (AKD-P02406, AKD-P03606)
Performance Parameters:
- Maximum braking current: 12 A RMS (3-phase at 255V)
- Thermal time constant: 150 seconds
- Resistance tolerance: ±5% at 20°C
Material Composition:
- Same as BDS4A-230J-000
- Resistor element rated for 325V DC continuous
Structural Features:
- Identical to BDS4A-230J-000
Working Principle:
Same as BDS4A-230J-000. The higher resistance value (30 Ω vs 20 Ω) limits current at the higher DC bus voltage, preventing overcurrent while still dissipating sufficient energy.
Advantages & Highlights:
- Matched to 325V DC bus systems (AKD-P02406, AKD-P03606)
- Higher continuous power rating for demanding applications
- Same plug-and-play connectivity as BDS4A-230J-000
Applicable Industries:
- Same as BDS4A-230J-000, specifically for 325V DC bus drives
- AKD-P02406 and AKD-P03606 applications
- High-inertia, high-speed deceleration applications
Installation Requirements:
- Same as BDS4A-230J-000
- Verify drive DC bus voltage setting matches 255J rating (325V DC nominal)
Usage Notes:
- Do not use 230J module on 325V DC bus — risk of overvoltage damage
- Do not use 255J module on 230V AC bus — insufficient braking
- Always match BDS model to drive DC bus voltage in Workbench configuration
