The TDK-Lambda EMI EMS40-250 is a 10 kW programmable DC power supply engineered for industrial test, burn-in, and automated test equipment (ATE) applications. Operating as a constant voltage/constant current source with automatic crossover, it delivers up to 40 VDC at 250 A with exceptional load regulation and thermal stability. The unit features forced air cooling with fan speed control, supports zero-stacking configuration, and operates across 0°C to 50°C at full output. Programmable via analog or optional digital interfaces, it integrates into demanding laboratory and production environments requiring precision power delivery and system automation.
## Technical Specifications
**Power Output & Voltage**
• 10 kW maximum output
• 40 VDC maximum output voltage
• 250 A maximum output current
**Input Specifications**
• 3-Phase 208 VAC (3P208): 180 to 253 Vac, 47–63 Hz
• Power Factor: 0.9 or higher (active power factor correction)
• Efficiency: Up to 85%
**Output Regulation & Stability**
• Voltage Mode: < 0.1% deviation on 100% load change
• Current Mode: < 0.1% deviation on 100% load change
• Line Regulation: 0.05% maximum deviation (voltage and current) over 8-hour period
• Temperature Coefficient: 0.02% per 1°C (voltage); 0.03% per 1°C (current)
• Ripple: Approximately 30% of peak-to-peak carrier ripple; reduced ripple option (40 mV P-P carrier) available on EMS II models
• Switching Frequency: 240–260 kHz
**Mechanical & Thermal**
• 19" rack mount form factor
• Forced air cooling with fan speed control
• Zero-stacking capable (side-by-side placement)
• Operating Temperature: 0°C to 50°C at full output; derating above 50°C
## Key Features
• Constant voltage/constant current operation with automatic crossover
• Full programmability via 0–5 V or 0–10 V analog programming (user-selectable DIP switches)
• Optional digital control interfaces for system integration
• High efficiency minimizes operating cost and heat generation
• Compact, lightweight design for space-constrained installations
## Typical Applications
• Industrial burn-in testing
• Automated test equipment (ATE) systems
• Laboratory research and development
• High-current DC load applications
## Compatibility & Integration
The EMS series shares design philosophies with GENESYS™ and ESS product families. Multiple input voltage configurations are available for regional power specifications. Analog programming with rear-panel DIP switch configuration supports flexible voltage and current setpoint control.
