The PQ-28 DC input power conditioning module from Calex has a wide (10:1) input range of 11 to 100 Vdc. The unit is rated up to 200 W and is housed in a compact 2.28" x 2.4" x 0.5"H package. The PQ-28 is designed to interface with the MIL-STD-1275, 28 Vdc power bus and to meet UL60950. It is optimized for use with the company's dc/dc converters. The efficiency of the module is 95%, with a switching frequency of 200 kHz. Temperature coefficient is 150 ppm/°C and baseplate-to-pin isolation is 700 Vdc, with an operating temperature range of -40 to 100°C. MTBF according to MIL-HDBK-217F is just over 170,000 hours. The PQ-28 is made in the USA and is available from stock to six weeks.