For cost-critical applications, the HF100W-SF family of enclosed 100W ac/dc power supplies contains seven models offering switch-selectable inputs with ranges of 85 to 132 Vac or 170 to 264 Vac and single outputs of 5, 7.5, 12, 13.8, 15, 24, and 48 Vdc. In addition to EN60950 and CE approvals, standard features include a line/load regulation of less than 0.5%, input/output isolation of 3 kVdc, leakage current of less than 0.7 mA, and a 20-ms hold-up time. Each unit comes with output-overload, over-voltage, and short-circuit protection. Output is adjustable by ±10% and MTBF per MIL HDBK 217F is greater than 100,000 hours. All models in the family operate over a temperature range of -10°C to +50°C with no derating or heat sinking with cooling via free-air convection. Pricing is under $25 each in OEM quantities. MICROPOWER DIRECT, Stoughton, MA. (781) 344-8226.


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