Trimming potentiometers designed to meet the most demanding requirements
Vishay Foil Resistors' 1240 / 1260 Series Accutrim trimming potentiometers
are now available from Digi-Key. The Bulk Metal foil ultra-high-precision
Accutrim trimming potentiometers designed to meet and exceed the
requirements of MIL-PRF-39035 Char. H.
The approved 1/4-inch square RJ26-style 1240 series and 3/8-inch square
RJ24-style 1260 series devices offer low end-to-end TCR of ±10ppm/C from
-55C to 150C (25C reference) and ±25ppm/C through the wiper. They also offer
load life stability of 0.1% typical under full rated power at 85C for 10,000
hours and a < 0.05% typical settability.
The ultra-high-precision trimmers feature a Bulk Metal foil resistive
element with inherent temperature and load life stability. Their advanced,
virtually backlash-free (< 0.05%) adjustment mechanism makes them easy to
set quickly and accurately, and maintain that setting through temperature
cycling and vibration, as well as thermal and mechanical shock eliminating
the need for unwanted adjustments.