The Kepco MSK20-5M is a 100 W linear DC power supply delivering 0–20 V at 0–5 A with exceptional output stability and noise performance. Built around a high-gain series-pass stabilizer topology, it produces less than 0.5 mV rms ripple in voltage mode and maintains load regulation of 0.01% across its rated output. Dual 10-turn potentiometers provide fine resolution control of voltage and current, while a Preview switch enables offline pre-configuration with digital meter readouts before applying load. The unit accommodates both 115 V AC and 230 V AC input via selectable voltage taps, operates across 50–65 Hz line frequencies, and includes heavy-duty front-panel binding posts rated for wire or banana-plug termination. Remote programming via variable resistance is supported. A quiet low-speed fan manages thermal load, and the supply automatically crosses over between constant-voltage and constant-current modes. Designed to EN 61010-1 and UL 3101 Category 2 / Pollution Degree 2 standards, this Class 1 instrument is suitable for laboratory, manufacturing test, and precision measurement applications requiring stable, low-noise DC power. Rack mounting is possible with an adapter. Weighs 17.45 lbs.
## Technical Specifications
• **Output Voltage Range:** 0–20 V DC
• **Output Current Range:** 0–5 A DC
• **Maximum Power:** 100 W
• **Ripple & Noise (Voltage Mode):** <0.5 mV rms, <3.0 mV peak-to-peak
• **Ripple & Noise (Current Mode):** <0.02%, <0.1%
• **Load Regulation (Voltage Mode):** 0.01% of 20 V max
• **Load Regulation (Current Mode):** 0.05% of 5 A max
• **Line Regulation:** 0.01% of rated value (voltage mode and current mode)
• **8-Hour Stability Drift:** 0.01% (voltage), 0.02% (current)
• **Temperature Coefficient:** 0.01% per °C (voltage), 0.02% per °C (current)
• **AC Input Voltage:** Selectable 105–125 V AC or 210–250 V AC
• **AC Input Frequency:** 50–65 Hz
• **AC Input Current:** 2.8 A @ 115 V; 1.4 A @ 230 V
• **Topology:** Linear series-pass stabilizer with quiet built-in fan
## Key Features
• 10-turn voltage and current controls for high-resolution adjustment
• Preview switch for offline voltage and current pre-setting
• Automatic voltage/current mode crossover
• Heavy-duty binding posts (wire or banana-plug compatible)
• Remote programming via variable resistance
• Ground terminal connected to chassis and local earth ground
• Class 1 design with protective earthing per EN 61010-1 and UL 3101
## Typical Applications
• Component and device testing requiring stable, low-noise DC power
• Laboratory instrumentation and precision measurement systems
• Manufacturing test stations and burn-in operations
• Research environments demanding minimal output ripple
## Compatibility & Integration
Output connections accept standard laboratory wiring and banana plugs via front-panel posts. Remote programming is enabled through variable resistance input. Optional rack-mount adapter available for integration into test rack systems. Operates on worldwide AC mains with dual voltage selection.
