250W Encapsulated AC-DCs feature PFC

The PPF 250-P59X series of fully-encapsulated, industrial quality ac-dc power supplies from Absopulse Electronics Ltd. deliver up to 250W output power from a universal 95- to 264-Vac power factor corrected (PFC) input. The units provide a single, regulated output of 12Vdc, 24Vdc, 48Vdc, 72Vdc, 110Vdc or 125Vdc. A dc-input version, which offers a 95- to 350-Vdc input range, is also available. Typical conversion efficiency is 80% at full load.

The power supplies are specifically designed for operation in extreme environments. The units are fully-encapsulated with a thermally-conductive MIL-grade silicon rubber compound with a UL94V-0 flammability rating to ensure protection from high levels of shock and vibration, moisture and other contaminants. They also meet environmental criteria as requested in MIL-810C, D. Conduction cooling via the baseplate enables operation within a -40 to +70 degrees C temperature range for full specification with no derating required.

The power factor is corrected to a minimum of 0.97 at full load for the entire input range in compliance with EN6100-3-2 for low input harmonic distortion. The power supplies are filtered to meet EN55022 EMI Class A with generous margins. Filtering to meet Class B is available on request. Full electronic protection on the input and output includes 4300Vdc input/output isolation, overload, overvoltage, short-circuit protection and thermal shutdown with auto-resetting.