Lambda / TDK / EMI EMS7.5

The Lambda/TDK EMS7.5 series comprises high-power switch-mode AC-to-DC power supplies engineered for applications requiring high efficiency, precise regulation, and compact form factor. These units operate as constant voltage/constant current sources with automatic crossover, delivering 7.5V DC output across multiple current and power ratings. Fully programmable via analog control or optional RSTL digital interface, the EMS7.5 integrates into demanding industrial and test environments.

Technical Specifications Output Characteristics

Output Voltage: 7.5V DC nominal

Output Current: 130A, 250A, 300A (model-dependent)

Output Power: 1 kW, 2 kW, 2.25 kW (model-dependent)

Efficiency: Up to 90% typical

Line Regulation: 0.1% of rated output voltage

Load Regulation: 0.1% of rated output voltage

Stability: 0.1% over 8 hours after 30 minutes warm-up Input Specifications

Single-phase: 170–265 VAC, 47–63 Hz

Three-phase 2.5 kW: 190–253 VAC at 47–63 Hz (28.5 A or 16.5 A, user selectable)

Three-phase 5 kW: 190–253 VAC at 24–30 A, 47–63 Hz or 342–418 VAC at 13.5–30 A, 50 Hz

Three-phase 480V: 342–528 VAC, 47–63 Hz Electrical Performance

AC Inrush Current: Less than full load current

Power Factor: 0.99 (single-phase), 0.94 (three-phase) at rated output power

Soft Start: Standard on all models

Key Features

Constant Voltage/Constant Current operation with automatic mode crossover

Programmable via analog signals or optional RSTL digital interface

Remote sensing available for models ≤300V output

CV/CC monitor, LOCAL/REMOTE, and ENABLE/DISABLE control signals

Soft-start circuit limits inrush current during power-on

Typical Applications High-current DC power delivery, test benches, industrial power distribution, battery charging systems, and precision laboratory equipment requiring stable, regulated output.

Compatibility & Integration Analog programming enables direct integration with existing control systems. Optional RSTL digital interface supports networked system architectures. Remote sensing maintains tight voltage regulation at load terminals, critical for high-current applications.