Vishay Releases New Series Of Miniature Z-Foil Resistors

Vishay Intertechnology, Inc. announced the Z202 series of miniature ultra-high-precision Z-Foil resistors, which provide a typical TCR of ±0.05ppm/°C from 0 to +60°C, PCR (ΔR due to self heating) of ±5ppm at rated power, tolerances to ±0.01%, load life stability of ±0.01%, and can be trimmed to any specific value at any tolerance within the standard resistance range of 5 to 30kΩ.

The Z202 is a miniaturized version of Vishay’s Z201. Constructed with a Bulk Metal® Z-Foil element, it is said to provide all of the inherent performance benefits of Z-Foil resistors. Vishay’s Z-Foil technology significantly reduces the resistive component’s sensitivity to ambient temperature variations and applied power changes. This level of stability, said to be more than an order of magnitude better than that offered by other resistor technologies such as thin film, wirewound, and thick film, is said to allow designers to guarantee a high degree of accuracy in fixed-resistor applications.

Applications for the new Z202 series include precision amplifiers, high-precision instrumentation, medical and automatic test equipment, high-end stereo equipment, electron beam scanning and recording equipment, and military, aerospace, and down-hole equipment and instrumentation.

The Z202 devices have a load-life stability of ±0.01% for 2000 hours at 70°C; a power rating of 0.125W at +125°C (0.25W at +70°C); current noise of < -40dB; and thermal EMF of 0.1µV/°C. They offer a non-inductive (<0.08μH), non-capacitive design, feature a voltage coefficient of <0.1ppm/V, and provide ESD protection above 25000V. The Z202 is available with both RoHS-compliant, lead (Pb)- free terminations and tin/lead terminations. Matched sets are also available upon request.

Production quantities are available now, with lead times of four to six weeks. Pricing begins at $2.30 depending on value, tolerance, and quantity.