Overview
The Lambda LYS-5-28 is a regulated linear power supply from Lambda Electronics’ LYS series, engineered to provide stable 5V DC output for industrial automation, servo drives, and control systems. This legacy model features the quality engineering Lambda is recognized for, making it suitable for applications where precise voltage regulation and reliability are essential. The used unit is fully functional and serves as an effective replacement for legacy systems requiring 5V regulated power.
Key Features
- 5V DC regulated output with tight line and load regulation
- Linear regulation design ensures low output ripple and noise
- Built for continuous operation in industrial environments
- Compact form factor suitable for OEM integration
- Remote sensing capability for accurate voltage compensation over cable runs
- Constant voltage source operation with thermal load derating
Technical Specifications
- Output Voltage: 5V DC ±5%
- Output Current Rating: 28A at 40°C ambient
- Power Output: 140W nominal
- Regulation (Line/Load): Typical 0.4%/0.8%
- Output Ripple: ≤15 mV RMS
- Operating Temperature: 0°C to +50°C ambient (derating applies above 40°C)
- Input Voltage: AC mains (230V nominal, 50/60Hz typical for LYS series)
- Protection: Constant voltage with current limiting on overload
Typical Applications
- Servo drive auxiliary power supplies and control circuits
- Industrial automation control systems and digital logic circuits
- Legacy PLC and motion control system power backup
- Laboratory and test equipment power
- OEM system cabinet power distribution
- Applications requiring low-noise regulated DC from AC mains
Compatibility & Replacements
Compatible With
- 5V logic and servo control circuitry
- Standard industrial control systems and enclosures
- AC mains 50/60Hz distribution
- Applications using remote sensing for voltage regulation
Replaces / Drop-In Replacement For
- Other Lambda LYS series 5V regulated supplies
- Legacy 5V linear power supply applications requiring 28A output
- Verify specific connector and terminal configurations with your system integrator before installation
Works With
- Standard 230V AC single-phase mains input
- Remote voltage sensing leads for cable drop compensation
- Industrial DIN rail or chassis mounting configurations
- Programmable overvoltage protection modules (optional accessories)




