Astrodyne / RO MK320S-24 Compact 300 Watt Enclosed Switching Power Supply

The Astrodyne / RO MK320S-24 is a compact, enclosed switching power supply delivering 300 watts of regulated 24 VDC output at 12.5 A. Purpose-built for ITE applications, this unit combines a small 7″ × 4″ × 2″ footprint with universal AC input compatibility and 85% efficiency to minimize thermal load in space-constrained installations.

## Technical Specifications

• **Output:** 24 VDC, 12.5 A (300 W)
• **Input Voltage:** 88–264 VAC (universal auto-range)
• **Input Frequency:** 47–63 Hz
• **Efficiency:** 85%
• **Isolation:** 3000 V
• **Ripple/Noise:** 100 mV peak-to-peak (24 VDC output, typical)
• **Inrush Current:** 20 A at 100 VAC; 40 A at 200 VAC (typical)
• **Operating Temperature:** −10°C to +60°C

## Key Features

• Compact enclosed chassis mount design fits confined spaces
• Auto-ranging universal input accepts 88–264 VAC without manual configuration
• Built-in EMI filtering minimizes conducted and radiated interference
• Convection cooling requires no forced air
• Regulated output maintains stable voltage under load variation
• Low ripple (100 mV p-p) supports noise-sensitive circuits

## Physical & Safety

• Dimensions: 178 mm × 102 mm × 51 mm
• Weight: 1.35 lbs (0.61 kg)
• UL60950-1 2nd edition compliance

## Typical Applications

Information Technology Equipment (ITE) requiring compact, efficient DC power conversion from global AC mains. Suitable for industrial controllers, distributed power systems, and embedded compute platforms where space and thermal efficiency are critical.