Vishay Intertechnology announced a series of thin film high-value precision single in-line resistors with resistance tolerance down to an industry-low 0.01% over a range of 50 kilohms to 10 megohms.
The Thin Film HVPS series of discrete resistors is intended for instrumentation amplifiers and precision voltage dividers in products such as medical and test equipment requiring high precision over a broad resistance range. HVPS devices offer designers compact and readily available alternatives to the wirewound resistors previously required for such applications.
In addition to precision performance over a high-value resistance range with a very low resistance tolerance, the thin film resistors provide excellent stability of 500ppm (2000 hours at +70C) and temperature coefficient ratio (TCR) values of 25ppm/C, 15ppm/C, 10ppm/C, and an ultra-low 5ppm/C.
The HVPS1 is available with a working voltage of 250V, a power rating of 0.125W, a resistance range of 50 kilohms to 5 megohms, and dimensions of 6.1x 6.6 x 2.8mm with 0.1" (2.54 mm) pin spacing.
Rated for a working voltage of 300V, a power rating of 0.250W, and a resistance range from 100 kilohms to 10megohms, the HVPS2 measures 8.1 x 6.6 x 2.8mm and features a 0.200" (5.08 mm) pin spacing.
A flame-resistant conformal coating that meets the UL94V-X rating protects epoxy body of the resistors, each of which also features a 99.6% alumina substrate, a TAMELOX (passivated nichrome) resistive element, and two copper terminals with a nickel barrier. Both resistor options are rated for an operating temperature range of -55C to +125C.
Samples and production quantities of the high-value precision resistors are available now, with a lead time of 10 weeks for larger orders.
Vishay Ltd, Attleborough, Norfolk NR17 AF, UK.