Power current sensing resistors have a TCR of ±0.2 ppm/°C
Designed to provide optimal performance when mounted on a chassis or cooled heat sink, the VCS331Z, VCS332Z, VFP4Z, and CSNG Series feature low TCR of ±0.2 ppm/°C from -55°C to +125°C, +25°C ref., PCR (ΔR due to self-heating) of 4 ppm/W typical, and tolerances to ±0.01%. For high-power applications, the devices offer power ratings up to 10W (on heatsink) and a four-terminal Kelvin configuration in order to remove the unwanted influence of lead resistance and lead sensitivity to temperature.
The resistors offer excellent load-life stability to ±0.005% typical (50 ppm) at 3 W (heat sink) and +25°C for 2,000 hours, a thermal stabilization time of under 1s (within 10 ppm of steady state value), and a wide resistance range from 0.25 Ω to 500 Ω. Any resistance value within this range is available at any tolerance with no additional cost or lead time effect. The resistors offer a rise time of 1.0 ns with effectively no ringing, current noise of 0.010 µVrms/V of applied voltage (<-40 dB), and a voltage coefficient of <0.1 ppm/V. The devices withstand ESD to at least 25 kV for increased reliability, and they offer a non-inductive (<0.08 μH), non-capacitive design.
The VCS331Z, VCS332Z, and VFP4Z are differentiated by power rating, thermal EMF, and configuration. The CSNG is a custom version of these resistors that can be uniquely designed and tailor-made to the customer’s specific applications and which has already been used by several research institutes and test and measurement companies. Samples and production quantities are available now, with lead times of five working days for samples and six weeks for larger orders.
Visit Vishay Foil Resistors at www.vishayfoilresistors.com
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