The Lambda/TDK EMI TCR7.5S115 is an SCR phase-controlled regulated DC power supply delivering 7.5 VDC at 115 A (860 W maximum output power). It combines constant voltage and constant current regulation with automatic crossover, selectable via local or external control. An internal RFI filter with ferrite toroidal chokes and VDE-listed capacitors reduces conducted RFI emissions by 1000× compared to previous SCR models, meeting VDE 875 Level N and VDE 871 Level A standards. Remote sensing compensates for voltage drops across the distribution system, maintaining tight regulation at the load. Soft-start circuitry eliminates inrush current on power-on or reapplication. The unit operates from 105–130 VAC, 47–63 Hz input and delivers output ripple and noise performance suitable for precision applications.
Technical Specifications
• Output Voltage: 7.5 VDC (max)
• Output Current: 115 A (max)
• Output Power: 860 W (max)
• Input AC Voltage: 105–130 VAC, 47–63 Hz
• Input AC Current: 9.5 A (max)
• Line Regulation: <0.1% of maximum rated output across full input range
• Load Regulation (CV Mode): <0.1% of maximum output voltage for 100% load change
• Load Regulation (CC Mode): <0.1% of maximum output current for 100% load change
• Temperature Coefficient (Voltage Setpoint): 0.02%/°C of rated output voltage
• Temperature Coefficient (Current Setpoint): 0.03%/°C of rated output current
• Efficiency: High operating efficiency
– Key Features
• Automatic CV/CC crossover with local and external control inputs
• Remote sensing for load-point voltage compensation
• 10-turn voltage control and one-turn current control potentiometers
• Voltage programming: 5000 Ω, 5 V, or 1 mA sensitivity
• Current programming: 100 Ω, 100 mV, or 1 mA sensitivity
• Internal RFI filter reducing conducted emissions 1000× over previous models
• Soft-start to prevent inrush current
• UL-rated AC input circuit breaker
• Analog panel voltage and current meters
– Typical Applications
Demanding applications requiring stable, efficient DC power conversion with tight line and load regulation, low EMI emissions, and remote load-point voltage sensing.
