The series should be selected where rapid .R stabilization and resistance stability under transient power conditions is required. These products achieve optimum performance when mounted on a chassis or cooled heat sink. The Z Based Technology provides extremely low WCR under defined conditions (see Figure 1 and Figure 2). The low absolute TCR provided by the Z Based Technology is measured over the temperature range of - 55 C to + 125 C, + 25 C reference (see Figure 3). All of these devices utilizing the Z Based Technology are provided with a true 4 terminal Kelvin connection. This is a must for current sensing when the R-value is less than 100 . The VHP4Z and VPR247Z types add the additional benefit of hermeticity. The welded construction and nitrogen backfill provide maximum protection against environmental stresses and insures long term stability. Typical applications for this new series includes electron beam circuitry, electron microscopes, fire control radar display systems, high speed video display, deflection amplifier circuits, constant current power supplies and forced balance electronic scales. Custom high power designs can be developed for your specific applications.