Y146810R0000Q9L

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-Foil technology provides extremely low PCR under defined conditions. The low absolute TCR provided by the Z-Foil technology is measured over the temperature range of - 55 °C to + 125 °C or 0 °C to + 60 °C, + 25 °C reference.

All of these devices utilizing the Z-Foil technology are provided with a true 4 terminal Kelvin connection. This is a must for precise current sensing when the R-value is less than 100 O. The VHP4Z and VPR247Z types add the additional benefit of hermeticity. The welded construction and nitrogen backfill provide maximum protection against environmental stresses and assures 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.

• Rapid ?R stabilization under transient loads
• Tenfold improvement of power coefficient of resistance (PCR): 4 ppm/W
• Low temperature coefficient of resistance : 0.05 ppm/°C typical (0 °C to + 60 °C) 0.2 ppm/°C typical (- 55 °C to + 125 °C, + 25 °C ref.)
• Resistance range: 0R25 to 500R
• Resistance tolerance: to ± 0.01 %
• Thermal resistance: 6 °C/W
• Electrostatic discharge (ESD) up to 25 000 V
• Rise time: 1 ns, effectively no ringing
• Power rating: 10 W on heatsink at + 25 °C 3 W in free air at + 25 °C
• Thermal stabilization time < 1 s (nominal value achieved within 10 ppm of steady state value)
• Load life stability: ± 0.005 % (50 ppm), 3 W on heatsink at + 25 °C, 2000 h ± 0.01 % (100 ppm), 3 W in free air at + 25 °C, 2000 h
• Voltage coefficient: < 0.1 ppm/V
• Current noise: 0.010 µVRMS/V of applied voltage (< - 40 dB)
• Inductance: 0.1 µH maximum; 0.08 µH typical
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