The Lambda / TDK / EMI EMS20-250-2-D-RSTL is a 5 kW switch-mode AC-to-DC power supply engineered for high-current, low-voltage industrial applications. It delivers 0–20V at 0–250A with constant current/constant voltage regulation and automatic crossover. The unit operates from three-phase AC input (190–250 VAC, 47–63 Hz, 23A) and includes front-panel adjustable overvoltage protection, thermal shutdown, and soft-start circuitry. Fully programmable via analog control or optional RSTL (RS232/IEEE 488) digital interface, it supports master-slave configuration for series and parallel operation.
## Technical Specifications
• Output Power: 5 kW
• Output Voltage: 0–20 V
• Output Current: 0–250 A
• Regulation (Voltage Mode): <0.1% of maximum output voltage for 100% load change
• Regulation (Current Mode): <0.1% of maximum output current for 100% load change
• Output Ripple: 75 mV RMS (approximately 30% of P-P carrier ripple)
• Transient Response: 650 microseconds for 30% load step below 20 V
• Stability: ±0.05% maximum deviation over 8 hours at constant line, load, and temperature
• Temperature Coefficient (Voltage): 0.02% per 1°C of rated output voltage
• Temperature Coefficient (Current): 0.03% per 1°C of rated output current
• Input Frequency: 47–63 Hz
## Key Features
• Dual-mode regulation with automatic crossover between CC and CV
• Programmable via analog voltage/current inputs or RSTL digital interface
• Built-in overvoltage protection (front-panel adjustable)
• Thermal protection and soft-start standard
• Digital panel meters for real-time monitoring
• External air-cooled design
• Rack-mountable chassis (19 in × 25 in × 5.5 in, 56 lb)
## Typical Applications
• Semiconductor processing and equipment
• Medical device manufacturing
• Scientific research laboratories
## Compatibility & Integration
• Master-slave configuration for series/parallel stacking
• RSTL interface supports RS232 and IEEE 488 protocols
• Three-phase input options: 190–250 VAC (23A), 342–418 VAC, 360–440 VAC, 374–456 VAC (Five Wire configurations)
