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MSA 150 Series

The MSA 150 series is an open-frame switch mode power supply with full medical approvals for patient monitoring and other portable medical equipment. The high efficiency series delivers an industry leading 9.8W/in³ power density and up to 94% converter efficiency. The MSA150 is offered in the industry standard 3 x 5 open frame and features a universal input range of 85VAC to 264VAC, enabling worldwide use. The MSA 150 delivers 150W of continuous power under free air convection and rises to 180W with just 100 LFM of forced air. The MSA 150 meets stringent medical safety approvals and features a very low safety ground leakage current of 150µA for medical applications. ICCNexergy MSA 150 Series

  • High Efficiency
  • Up to 180W with Forced Air
  • High Power Density 9.8W/in³
  • Lifetime Expectation > 5 years
  • Hold-Up Time > 25ms at full load
  • Medical Approval - EN60601-1 Class I
  • Energy Star Level V
  • EISA Compliant
  • CEC Compliant

Input Voltage 85 - 264VAC
100 - 240VAC Nominal
Input Frequency 47 - 63Hz
Input Current <2A rms
Inrush Current <37A at 230VAC cold start
Power Factor >0.97
Zero Load
Power Consumption
Earth Leakage Current <150µA @ 132VAC @ 60Hz
<250µA @ 264VAC @ 60Hz
Patient Leakage Current <50µA @ 132VAC @ 60Hz
<75µA @ 264VAC @ 60Hz
Output Voltage See table
Total Regulation +/-5%
Minimum Load No minimum load required
Start-Up Delay <1.5s
Hold-Up Time >25ms at any input voltage
Ripple & Noise <1% pk-pk**
Over Voltage Protection 110-135%
Over Temperature Protection Active - Recoverable; plus
Passive - Non Recoverable
Over Current Protection 120 - 180%
Short Circuit Protection Shutdown, auto-start
(hiccup mode)
**Ripple and noise measured with 20MHz bandwidth; 10µF tantalum capacitor in parallel with a 0.1µF ceramic capacitor.
Digi-Key Part Number Manufacturer P/N Output Voltage Output Current¹ Forced Air Current² Total Regulation³
EPS441-ND MSA150012A 12.0V 12.5A/15.0A PK 15.0A ±5%
EPS442-ND MSA150015A 15.0V 10.0A/12.0A PK 12.0A ±5%
EPS443-ND MSA150018A 18.0V 8.3A/10.0A PK 10.0A ±5%
EPS444-ND MSA150024A 24.0V 6.3A/7.5A PK 7.5A ±5%
1) With convection cooling. Peak load (180W) lasting up to 500ms with a maximum 10% duty cycle.
2) Sustained output current with minimum 100 LFM.
3) Includes initial setting, line regulation, load regulation, and thermal drift.