397 series

      The 397 series are kinds of subminiature fuses.Here you can get something about the features.First,it has surge proof for telecom applications.Secondly,it reduces PCB space requirements.Thirdly,it has direct solderable or plug-in versions.Fourthly,it has low internal resistance.Fifthly,it has shocksafe casing.Sixthly,it is resistant against vibration.At last,it is halogen free.
      The following is about the packaging. 397 series contains 000 which is tape/ammopack (1400 pcs.) and 044 which is short leads - bulk (1400 pcs.).Next is about the materials.The Base/Cap uses Brown Thermoplastic Polyamide PA 6.6, UL 94 V0.The round pins use copper and Sn plated.The operating temperature ranges from -40 ºC to +85 ºC(consider de-rating).Then we introduce something about the stock conditions.The temperature is from +10 ºC to +60 ºC.The relative humidity is lower than 75 % yearly average,without dew and the maximum value for 30 days is 95 %.The vibration resistance comes next.It has 24 cycles at 15 min. each (EN 60068-6),10 - 60 Hz at 0.75 mm amplitude and 60 - 2000 Hz at 10 g acceleration.The lead pull strength is 10 N (EN 60068-2-21).The solderability is 260 ºC, 3 s (Wave) and 350 ºC, 3 s (Soldering iron).The unit weight is 0.60 g (approx.).