1240/1260 Series Accutrim™ Trimming Potentiometers

Vishay Foil's improved 1240 and 1260 series Bulk Metal foil ultra-high-precision Accutrim trimming potentiometers

Vishay Foil Resistors' 1240 / 1260 Series Accutrim™ Trimming PotentiometersVishay Foil Resistors offers two series of 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" square RJ26-style 1240 series and 3/8" square RJ24-style 1260 series devices offer low end-to-end TCR of ±10 ppm/°C from -55°C to 150°C (25°C reference) and ±25 ppm/°C through the wiper. They also offer load life stability of 0.1% typical under full rated power at 85°C for 10,000 hours and a < 0.05% typical settability. 

Vishay Foil’s 1240 and 1260 series of ultra-high-precision trimmers feature a Bulk Metal foil resistive element that possesses a unique inherent temperature and load life stability. Their advanced, virtually backlash-free (< 0.05%) adjustment mechanism makes them easy to set quickly and accurately, and maintains that setting through temperature cycling and vibration, as well as thermal and mechanical shock. A unique feature of the Vishay foil trimmer is its stability in the vibration environment, which eliminates the need for unwanted adjustments.

The devices offer a multi-fingered, noble metal wiper engaging a planar surface of etched foil for low TCR end-to-end (five times tighter than required by MIL-PRF-39035 Char. H) and through the wiper. Other technologies, such as wirewound and cermet trimmers, have a fair TCR end-to-end, but cannot be relied upon to demonstrate an acceptable TCR through the wiper, which is an important element in the precise adjustment of circuits subject to temperature fluctuations.

In addition to their low TCR and excellent load life stability, the 1240 and 1260 trimmers feature a 0.1% typical setting stability, a wide resistance range from 5 Ω to 10 kΩ, and standard resistance tolerances of ±5% and ±10%. The devices offer a 0.25 W power rating at +85°C and for increased reliability provide the utmost in ESD immunity, withstanding electrostatic discharges up to 25 kV.

The devices provide unidirectional, infinite resolution, which when synthesized by a combination of an absolutely uniform resistance material, multiple wiper contact points, and multiple resistance circuit paths, yields a uniquely accurate settability of less than < 0.05%. There are no turns of wire to be traversed, causing a step function, and no contact resistance variation to cause an irregular change in resistance with mechanical adjustment.

1240-1260 Series Accutrim

ImageManufacturer Part NumberDescriptionAvailable Quantity
TRIMMER 2K OHM 0.25W PC PINY40532K00000J0LTRIMMER 2K OHM 0.25W PC PIN531 - Immediate
Y40532K00000J0L product page link
TRIMMER 10K OHM 0.25W PC PINY405310K0000J0LTRIMMER 10K OHM 0.25W PC PIN2749 - Immediate
Y405310K0000J0L product page link
TRIMMER 1K OHM 0.25W PC PINY40531K00000J0LTRIMMER 1K OHM 0.25W PC PIN819 - Immediate
Y40531K00000J0L product page link
TRIMMER 100 OHM 0.25W PC PINY4053100R000J0LTRIMMER 100 OHM 0.25W PC PIN111 - Immediate
Y4053100R000J0L product page link
TRIMMER 10K OHM 0.25W PC PINY006910K0000J0LTRIMMER 10K OHM 0.25W PC PIN23 - Immediate
Y006910K0000J0L product page link
TRIMMER 5K OHM 0.25W PC PINY40535K00000J0LTRIMMER 5K OHM 0.25W PC PIN88 - Immediate
Y40535K00000J0L product page link
TRIMMER 500 OHM 0.25W PC PINY0069500R000J0LTRIMMER 500 OHM 0.25W PC PIN52 - Immediate
Y0069500R000J0L product page link
TRIMMER 2K OHM 0.25W PC PINY00692K00000J0LTRIMMER 2K OHM 0.25W PC PIN37 - Immediate
Y00692K00000J0L product page link
TRIMMER 2K OHM 0.25W PC PINY00532K00000J0LTRIMMER 2K OHM 0.25W PC PIN27 - Immediate
Y00532K00000J0L product page link
TRIMMER 10K OHM 0.25W PC PINY505310K0000J0LTRIMMER 10K OHM 0.25W PC PIN90 - Immediate
Y505310K0000J0L product page link
TRIMMER 200 OHM 0.25W PC PINY4053200R000J0LTRIMMER 200 OHM 0.25W PC PIN18 - Immediate
Y4053200R000J0L product page link
TRIMMER 500 OHM 0.25W PC PINY4053500R000J0LTRIMMER 500 OHM 0.25W PC PIN7 - Immediate
Y4053500R000J0L product page link
TRIMMER 2K OHM 0.25W PC PINY50532K00000J0LTRIMMER 2K OHM 0.25W PC PIN33 - Immediate
Y50532K00000J0L product page link
TRIMMER 5K OHM 0.25W PC PINY00535K00000J0LTRIMMER 5K OHM 0.25W PC PIN0Y00535K00000J0L product page link
Published: 2012-06-29