Kepco MSK20-5M

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.