What are the termination types on military ceramic chips?
Military MLCC are available with either of two termination finishes. Our “Solderguard I” incorporates a Ni barrier layer to protect against leaching, with an over coating of Sn60 solder, applied by dipping. This termination meets the requirements of MIL-PRF-55681 “S” (solder coated, final), and “U” (base metallization – barrier metal – solder coated). For those customers requesting a plated termination, we offer “Solderguard II”, incorporating the same Ni barrier layer, which is then over-plated with pure matte Sn. This termination meets the current requirements of MIL-PRF-55681 “W” (base metallization – barrier metal – tinned or tin/lead alloy), or “Y” (base metallization – barrier metal – tinned – 100% Sn). In addition, we can supply gold plating over nickel, but this is considered a non-standard termination, and cannot be JAN branded.