The resistive element comprises a thin film of nickel-chrome alloy evaporated onto a high thermal conductivity ceramic element. Metal end caps are force fitted to the element prior to spiralling to value. Tinned copper lead wires are welded to the end caps and the components are then coated. One coat of phenolic resin is followed by three coats of epoxy resin. All resistors are tested for value and tolerance.
   
Key Features
■ Precision metal film resistors
    with tolerance to 0.1% and
    temperature coefficients to
    15ppm.
■ Metal film resistors have
    excellent stability under load
    and severe environmental
    conditions. They exhibit very
    low noise current and voltage
    coefficients. Precision metal
    film resistors are particularly
    suitable in all applications
    where long-term stability is
    important.