250W Convection-cooled AC-DC Power Supply

The universal AC input CHD250 provides 250W of convection cooled output power in a 3″ x 5″ industry standard package, over the temperature range -20°C to +50°C with derating to +70°C.Approved for IT and Medical and with a feature set including a 5V standby output, <0.5W input power when in standby mode, power fail and inhibit signals the CHD250 is ideal for a wide range of applications where fan cooling is not desirable.


CHD250PS1280 to 264 Vac12 V / 20.8 A250W
CHD250PS1580 to 264 Vac15 V / 16.7 A250W
CHD250PS2480 to 264 Vac24 V / 10.4 A250W
CHD250PS2880 to 264 Vac28 V / 8.9 A250W
CHD250PS4880 to 264 Vac48 V / 5.2 A250W


Dimensions:CHD250: 5.00 x 3.00 x 1.43 in (115.0 x 76.0 x 36.0 mm)
CHD250-C: 5.50 x 3.48 x 1.75 in (139.7 x 88.5 x 44.4 mm)
Input Voltage:80-264 VAC (see datasheet)
No Load Input Power<0.5 W
Harmonic Currents:EN61000-3-2 Class A EN61000-3-2 Class C for load >60 W
Efficiency:91-92% typical
Operating Temp:-20 °C to +70 °C derate from 100% load at 50 °C to 50% load at 70 °C
Isolation:4000 VAC Input to Output, 2 x MOPP
1500 VAC Input to Ground 1 x MOPP
1500 VAC Output to Ground 1 x MOPP
Worldwide Safety Approvals:IEC60950-1 Ed 2, IEC60601-1 Ed 3 Including Risk Management
European Safety Approvals:EN60950-1, EN60601-1, CE Mark LVD & RoHS
US Safety Approvals:UL60950-1, CSA 22.2 No.60950-1-1:08, ANSI/AAMI ES60601-1:2005 & CSA C22.2, No.60601-1:08
EMC:EN55022/11, Level B conducted & Level A radiated

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Selecting the right power supply for your application is not a small task. Let our technical sales engineers guide you through the process of choosing the right solution for your needs.

Below some parameters usually required to size and select the right power supply:

  • Power & control requirements
  • Output & Input Voltage / Multioutput Voltage / Variable Voltage
  • Redundancy level
  • Mounting
  • Inrush Current
  • Environmental specifications (Temperature, altitude, vibration, shock)
  • Specific Industries Standards (Railway, Military, Medical)
  • Terminals

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Contact our team of experienced engineers to discuss your unique power conversion and backup needs. We offer a wide range of highly reliable components that can be integrated and customized to create a solution that meets or exceeds your requirements.

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