Designed to be direct replacements for select wirewound devices, the VPR5Z and the VPR7Z ultra-high-precision Bulk Metal Z-Foil power current sensing resistors feature low TCR of ±0.05 ppm/°C from 0° to 60°C and ±0.2 ppm/°C from –55°C to 125°C, 25°C ref, and resistance tolerance to ±0.01. For high-power applications, the VPR5Z offers a power rating of 5 W at 25°C, while the VPR7Z offers a power rating of 7 W and load life stability of ±0.01% at 70°C for 2,000 hours at rated power.
Other features include a value range of 5 Ω to 100 kΩ, a rise time of 1 ns, with effectively no ringing, thermal EMF of 0.05 µV/°C typ, and a thermal stabilization time of ≤1 s. Both the VPR5Z and the VPR7Z have four-terminal construction, heavy fixed leads, and flexible wire leads. (From $14.97 — 5 days for samples; 8 weeks for standard orders.)
By Christina D’Airo
Vishay Precision Group , Malvern , PA
Marti Spalding 919-374-5515
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