2R400-4S tubes equivalent, gas discharge tubes.
! Size:4.2mm*4.0mm ! DC Spark-over voltage: 75~2000V ! Stable breakdown voltage. ! High insulation resistance. ! Low capacitance (<1pF) ! High holdover voltage. ! Large a.
are high frequency telecommunication lines,stations, security systems,HID and high quality Surge Protection Devices (SPD.
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