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Kollmorgen B-604-C-A3
Overview:
The B-604-C-A3 is a variant within the Kollmorgen B-604 braking resistor product line. The “C” suffix denotes a specific configuration option (typically a different terminal style or mounting arrangement compared to the “B” variant), while “A3” specifies the connector/terminal type. This resistor serves the same core function as the B-604-B-A3 — dissipating regenerative energy — but with configuration differences suited to specific drive or cabinet layouts.
Detailed content
Key Specifications:
| Parameter | Value |
|---|---|
| Resistance Value | 4 Ω (±5%) |
| Rated Continuous Power | 600 W |
| Peak Power (10 sec) | 1200 W |
| Max DC Bus Voltage | 565 VDC |
| Enclosure | Extruded Aluminum, Anodized |
| Cooling | Natural Convection |
| Terminal Type | Screw terminals — A3 configuration |
| Operating Temperature | -20°C to +80°C |
| IP Rating | IP20 |
| Weight | Approximately 1.5 kg |
Structural Features:
- Identical aluminum housing construction to B-604-B-A3
- “C” variant may feature modified mounting flange orientation or terminal position
- Pre-wired leads with ring terminals (A3) for quick field connection
- Fin geometry optimized for vertical or horizontal mounting
Working Principle:
Identical to B-604-B-A3. When the servo drive’s DC bus voltage exceeds the braking threshold during deceleration, the drive activates an internal braking transistor, routing regenerative current through the B-604-C-A3. The NiCr wire-wound resistor element converts the electrical energy to heat, which is dissipated through the aluminum housing fins via natural convection.
Advantages:
- Same high-reliability, maintenance-free design as B-604-B-A3
- “C” configuration offers alternative mounting/terminal options for constrained cabinet layouts
- Direct compatibility with S700 and AKD series drives
- No fan, no filter — zero maintenance
Applicable Industries:
Same as B-604-B-A3: CNC, hoists, conveyors, winding equipment, elevators.
Installation Requirements:
- Minimum 100 mm clearance on all sides for airflow
- Mount using provided flanges — torque mounting screws to 2.5 Nm
- Wire gauge: minimum 10 AWG (6 mm²)
- Ground to cabinet chassis
Usage Precautions:
- Surface temperature can exceed 150°C during operation
- Match resistance value to drive’s braking resistor parameter setting
- For continuous regeneration duty >50%, upsize to B-606 or B-610 series
