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  • Effects of Harmonic Currents on Semiconductor Fuse Ratings
    to be made to allow for ambient temperature, size of connecting cables and any air cooling. Standard type tests are done at 50 or 60Hz, but in modern power electronic applications the frequency may be much higher. It is not widely recognized that this may require de-rating of the fuses. A recent
  • U.S. Battery and Fuel Cell Patents :: ABT Online :: March 2009 :: Advanced Battery Technology ::
    Hori, Yoichiro Tsuji, Akihiko Yoshida, Takeshi Yonamine, and Makoto Uchida, Panasonic Corp. (JP) and Asahi Glass Co., Ltd. (JP). U.S. 7,473,487 (20090106), Temperature fuse, and battery using the same, Kenji Senda, Atsushi Kono, and Tatsuya Wada, Panasonic Corp. (JP). U.S. 7,473,488 (20090106), Battery
  • PPTC Design Considerations for Automotive Circuits
    and overloads. Current limiting can be accomplished by using a resistor, fuse, switch or PTC (positive temperature coefficient) device. Resistors are rarely an acceptable solution because an expensive high-power resistor is usually required, although they are used occasionally for very low power loads
  • Powder Metal Molding
    Powder metal molding uses heat and pressure to form precision parts and shapes. The process begins by filling a die with powder and then compacting it at room temperature to form an engineered shape. Next, this compacted shape is ejected from the press and fed through a high-temperature furnace
  • Ferro Techniek's E-FAST® Sensor Technology
    Why use E-FAST®? Because our elements are high powered, fast and extremely responsive, any lack of dissipation of the heat due to abnormal use, dirt or scaling should be detected immediately. Bimetal switches, thermal fuses, NTC's and other present-day temperature protective devices are limited
  • Circuit Protection Design Considerations for LCD (Liquid Crystal Display) TV Power Supplies and I/O Ports (.pdf)
    of circuit protection devices can be used to help protect the LCD screen from damage caused by excessive current or voltage transients. Overcurrent protection may take the form of a fuse or a resettable PPTC (polymeric positive temperature coefficient) device. Deciding whether to specify a PPTC device
  • Full Overheating Protection
    by an overheated part of a heating track. According to Gerd Kloppers, Ferro's development engineering manager, temperature protective devices such as bimetal switches, thermal fuses and negative temperature coefficient thermistors (NTCs) are limited in their performance by providing only local
  • Automotive Bladed Device Tech Brief (.pdf)
    . The solid-state design of the PolySwitch device, as opposed to the multi-part mechanical design of the bimetal device, provides significant advantages in automotive applications. The device's resettable functionality, high resistance to shock, vibration and rough handling, lower surface temperature and power

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