CDH250 – AC/DC Power Supplies Single Output: 250W

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.

The CHD250 series offers a low no-load power consumption of less than 0.5 W. Featuring an almost flat efficiency curve over the entire load range, the series achieves an exceptional efficiency of between 93 and 94% typical at 230 VAC and full load, assisting end customers in meeting energy saving criteria of new ‘green’ standards and minimising waste heat. In addition, the high efficiency allows the units to be convection-cooled, eliminating the need for cooling fans, making the series especially suitable for low audible noise requirements.

he range comprises five models, providing output voltages of + 12, 15, 24, 28 and 48 VDC. Standard features include a power fail signal, output inhibit and remote sense, plus adjustment of the output voltage by the user of +5/-4%. To ensure that customers only pay for what they need, options for this series include a 5 VDC / 0.5A standby output for powering memory or logic and a covered version.



Model Input Output Power
CHD250PS12 80 to 264 Vac 12 V / 20.8 A 250W
CHD250PS15 80 to 264 Vac 15 V / 16.7 A 250W
CHD250PS24 80 to 264 Vac 24 V / 10.4 A 250W
CHD250PS28 80 to 264 Vac 28 V / 8.9 A 250W
CHD250PS48 80 to 264 Vac 48 V / 5.2 A 250W


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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