By Caroline Hayes 9th September 2021
Two high temperature film capacitors by Electrocube can be used in high temperature applications. The 433D and 463D foil capacitors are manufactured using Polytetrafluoroethylene (PTFE or Teflon) for extreme heat protection. The 433D series is Teflon and foil and the 463D series is metallised Teflon. The capacitors are available from New Yorker Electronics.
The capacitors are optimised for high temperature applications subject to AC and pulsing signals. The rugged, non-inductively wound film and foil capacitors have a high temperature outer wrap and an epoxy endfill which meets or exceeds flammability requirements of UL94V0. They are manufactured with proprietary processes, claimed to offer high frequency operation, high current and stability in a miniature package to handle high surge currents without degrading. The 433D series in particular, is suitable for applications such as avionics, wind generation, high power applications, underground exploration and turbines.
Both capacitors are designed with an extended electrode construction and standard tin-coated, oxygen-free solid copper leads, in both RoHS and non-RoHS versions. The 433D has tolerances of ±5%, ±10% and ±15%. The 463D series has tolerances of ±5%, ±10% and ±20%.
Both operate in frequencies up to 100kHz and have a temperature range of -55°C to +150°C without derating. They are also proven to withstand 150% of DC rated voltage (for a period not exceeding one minute at temperature of 25°C), according to New Yorker Electronics, and a maximum current of 5mA. They will withstand 140% of the DC-rated voltage at 150°C for 250 hours with not more than one failure in 12 permitted. The dissipation factor will not exceed 0.1% at 25°C and the dielectric absorption will not exceed 0.02% at 25°C per MIL-C-19978.
Protective clear wrap is offered, together with customisable insulating sleeves, mountings, special terminals, non-standard leads, circuit connections. New Yorker Electronics can offer assorted styles, ratings and customisation for unusual requirements, including units with a higher IR or lower DF. Models with different dimensions for all manufactured values are available on request. with the same volume.
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