OEM Sensors And Components - Resistor Products - Fixed Resistors
Selected familes applicable to instrumentation measurments.
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Vishay VRM Series
The VRM style is a miniaturized version of the now famous S102C. It is made with a foil element so it retains all of the inherent performance of foil resistors. It does not, however, have the value range, power rating, TCR or lead spacing of the S102C. It is a size for size replacement for certain wirewounds and finds application in situations where size constraints dictate the use of this miniature precision resistor.
FEATURES
• Temperature Coefficient of Resistance:
± 4ppm/°C (0°C to + 60°C); ± 8ppm/°C (– 55°C to + 125°C)
(TCR to ± 5ppm/°C ,– 55°C to + 125°C available.)
• Resistance Range: 5Ω to 50KΩ
• Tolerance:
5Ω to < 50Ω: ± 0.1%, ± 0.25%, ± 0.5%, ± 1.0%
50Ω to 50KΩ: ± 0.01%, ± 0.02%, ± 0.05%, ± 0.1%,
± 0.25%, ± 0.5%, ± 1.0%
• Power Rating: 0.25 W @ + 70°C; 0.125 W @ + 125°C
• Load Life Stability: ± 0.05% Maximum ∆R @ rated power
and temperature for 2,000 hrs.
• Non Inductive: < 0.08µH
• Thermal EMF: < 0.1µV/°C
• Long Term Stability: 0.0025% (25ppm) per year under
low power and room temperature conditions
• Voltage Coefficient: < 0.1ppm/V
• Maximum Working Voltage: 250 volts
• Shelf Life: 0.0025% (25ppm) per year |
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Vishay S102K series
The "S" series of resistors and in particular the S102C is the starting point in the selection of foil resistors. Vishay has the longest history and most supporting data on this product. All other foil resistors are offshoots of this initial endeavor and provide unique features beyond the range of the "S" series.
FEATURES
• S102K Series Nominal Temperature Coefficient of Resistance:
– 0.3ppm/°C (0°C to + 25°C); + 0.3ppm/°C (+ 25°C to + 60°C); – 1.0ppm/°C (– 55°C to + 25°C); +1.0ppm/°C (+ 25°C to + 125°C)
• S102C Series Nominal Temperature Coefficient of Resistance:
+ 0.6ppm/°C (0°C to + 25°C); – 0.6ppm/°C (+ 25°C to + 60°C); + 2.2ppm/°C (– 55°C to + 25°C); –1.8ppm/°C (+ 25°C to + 125°C)
• Selected TCR Tracking: to 0.5 ppm/°C (matched sets)
• Shelf Life Stability: ± 25ppm maximum for 1 year
• Power Rating: 0.6 to 2.0 Watts at + 70°C; 0.3 to 1.0 Watts at + 125°C (depending on model)
• Load Life Stability: ± 150ppm Maximum deltaR (2000 hours at rated power)
• Resistance Tolerance (Initial Resistance Accuracy):
± 0.005% tightest to ± 1.0% loosest (depends on resistor value)
• Resistance Range: 0.5W to 1MW
• Current Noise: 0.010mV (RMS)/Volt of Applied Voltage
• Thermal EMF: 0.1mV/°C Maximum; 0.05mV/∞C Typical;
1mV/watt (Model S102C, S102K)
• Rise/Decay Time: 1.0 nanosecond @ 1KW |
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