Model Code Breakdown:

• 604 = AKD Braking Resistor Series
• C = Resistance Value Code
• A3 = Power Rating Code

Resistance Value: 47 Ω (±5%)

Power Rating: 300 W (continuous)

Peak Power Rating: 900 W (10 seconds)

Voltage Rating: 480 VDC maximum

Enclosure Type: Aluminum housing with mounting brackets

Dimensions (W × H × D): 150 mm × 80 mm × 120 mm (approximate)

Weight: 1.8 kg

Terminal Type: Screw terminals, 6 mm² wire capacity

Cooling: Natural convection (forced air optional for derated operation)

Operating Temperature: -25°C to +70°C

Insulation Class: Class B (130°C)

Protection Rating: IP20 (install in NEMA 1 enclosure for industrial use)

Certifications: CE, UL, cUL, RoHS

Compatible Drives: AKD2G, AKD-P, S-Series, T-Series (any Kollmorgen servo drive with brake chopper output)

Key Advantages:

• External mounting allows placement away from heat-sensitive components
• 300 W continuous rating suits medium-inertia applications
• Screw terminals simplify field wiring

Applicable Industries:

• Vertical axis servo drives
• High-speed deceleration applications
• Robot joints with frequent direction reversal
• Conveyor brake-to-stop cycles

Installation Requirements:

• Mount on vertical surface with 100 mm clearance above and below
• Connect to drive brake chopper terminals (B+/B-)
• Use 4 mm² copper wire, max length 5 m
• Ensure ambient temperature does not exceed 50°C for full 300 W rating

Usage Notes:

• Derate power by 2% per °C above 40°C ambient
• Do not block ventilation openings on resistor housing
• For continuous regen duty, calculate average brake power: P_brake = 0.5 × J × ω² / t_decel
• Replace if resistance drifts beyond ±10% of nominal value