AC/DC power supplies meet Class II safety for medical devices

XP Power has released a new series of 500-W AC/DC power supplies that provides Class II safety certification, including BF (body floating) class insulation. The power supplies target medical device applications that require Class II (without earth) installation and excellent electromagnetic compatibility (EMC) performance.

The PBL500 series offers power levels up to 500 W when forced cooled or fitted with an integral fan and 250 W when convection cooled. Other key specs include a wide, universal input of 80 VAC – 264 VAC at 47 Hz to 63 Hz and single output voltages from 12 V to 57 V . These wide ranges enable the series to target a variety of applications.

The series is available in two mechanical formats: U-channel and top fan cover. The U-channel units provide 250 W when convection cooled and 450 – 500 W with external forced air cooling. The top fan cover version, including a variable speed integral cooling fan for low audible noise, provides a complete 450 – 500 W solution.

The power supply series offers a low patient leakage current and provides 2 x MOPP from input to case, 2 x MOPP from input to output, and 1 x MOPP from output to ground. Input to case and input to output isolation is rated at 4000 VAC and output to ground is 1500 VAC. Both conducted and radiated emissions are class B, and the series is compliant with IEC/ES/EN 60601-1 edition 3.1 and 60601-1-2 edition 4.

Other features includes a 5-V standby supply, overvoltage and overcurrent protection, remote sense, thermal shutdown, an ‘AC OK’ signal, and remote on/off control. The U-channel version also provides a 12 V, 0.3 A output suitable for powering system cooling fans.

The PBL500 power supplies are priced from $192 for 500+ piece orders. The power supplies come with a three-year warranty. They can be purchased direct from XP Power or through its distribution partners Allied Electronics, Digi-Key, Mouser, and Newark.