VSMP Series is the industry’s first device to provide high rated power and excellent load life stability along with extremely low TCR — all in one resistor.
One of the most important parameters influencing stability is the Temperature Coefficient of Resistance (TCR). Although the TCR of foil resistors is considered extremely low, this characteristic has been further refined over the years. The VSMP Series utilizes ultra high precision Bulk Metal® Z-Foil. The Z-Foil technology provides a significant reduction of the resistive element’s sensitivity to ambient temperature variations (TCR) and to self heating when power is applied (Power Coefficient of Resistance, or PCR). Along with the inherently low PCR and TCR, Z-Foil technology also provides remarkably improved load life stability, low noise and tight tolerances.
The VSMP resistor has a full wraparound termination which assures secure contact during the manufacturing process, as well as providing stability during multiple thermal cyclings.
Resistance tolerance: to ± 0.01 %
Power rating: to 750 mW at + 70 °C
Load life stability: to ± 0.005 % at 70 °C, 2000 h at rated power
Resistance range: 5k to 125 k
Vishay Foil resistors are not restricted to standard values, we can supply specific “as required” values at no extra cost or delivery (e.g. 1K2345 vs. 1K)
Thermal stabilization time < 1 s (nominal value achieved within 10 ppm of steady state value)
Electrostatic discharge (ESD) at least to 25 kV
Short time overload: 0.005 %
Non inductive, non capacitive design
Rise time: 1 ns effectively no ringing
Current noise: 0.010 µVRMS/V of applied voltage (< - 40 dB)
Voltage coefficient < 0.1 ppm/V
Non inductive: < 0.08 µH
Non hot spot design
Terminal finishes available: lead (Pb)-free, tin/lead alloy