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RoHS Compliant Conforming to Directive 2002/95/EC of the European Parliament on the restriction of the use of certain hazardous substances in electrical and electronic equipment. These hazardous substances are mercury, cadmium, lead, hexavalent chromium, PBBs (polybrominated biphenyls) and PBDEs (polybrominated diphenyl ethers). The Directive takes effect on July 1, 2006. Temperature, Ambient The environmental temperature which exists unmodified by the operation of dissipative apparatus. Temperature, Operating The environmental temperature that prevails when the power supply is operating, reflecting, therefore, the effect a dissipative power supply has on its own environment. Measured at the air intake or - for convection-cooled supplies - below the equipment. Also, the operating temperature range is the range of temperatures through which specified operation can be obtained. |
  Kepco is pleased to introduce a 300 Watt addition to its popular RTW series of single output, RoHS compliant power supplies. These supplies are ideal for new OEM designs in networking equipment and other products where low-profile, RoHS compliance and higher power are a must. The 300 Watt RTW model is available in seven models from 3.3 Volts to 48 Volts |
  Many industrial and particularly military applications require their electronics to withstand occasional extremes in ambient temperature. Two such examples might be powering outdoor LED signs (such as "Amber Alert" signs), traffic signals, and railroad crossing gates. In the military, second or third echelon military communications systems are obvious applications. For switch-mode power supplies, there is an inherent problem in starting the oscillator (switch) at extremely low temperatures where the electrolyte in electrolytic capacitors has frozen. Kepco is pleased to report that its RKW programmable series of single output 300, 600 and 1500 Watt power supplies may be operated down to -40° C ambient temperature and also will start up at this temperature based on a 1-hour cold soak test. Ripple and noise may initially increase above published specifications below -10° C ambient until the circuit self-warms. If the power supply will be repeatedly exposed to such conditions, Kepco strongly recommends that a factory-applied moisture proofing be ordered to protect against the effects of condensation inside the unit. At the high end of the temperature range, the RKW provide up to 40% of the rated output power at +74° C ambient. |
