Low-TC film resistors cover a wide range

Edited by the Electronicstalk editorial team May 8, 2006

The USF300 Series of ultrastable low-TC ultraprecision film resistors has been developed for use in the most demanding precision analogue electronics applications.

Available now from Caddock Electronics, the USF300 Series of ultrastable low-TC ultraprecision film resistors has been developed for use in the most demanding precision analogue electronics applications.

The USF300 Series provides the widest resistance range - 50ohm to 25Mohm - for a low-TC resistor product available in the industry.

Maximum temperature coefficient is 5ppm/C from -40 to +85C.

The USF300 Series is available in three models with voltage and power ratings of 300V/0.33W, 1400V/0.75W and 2500V/0.75W.

For ultralow TC Caddock offers the USF200 Series with a maximum temperature coefficient of 2 ppm/C from -40 to +85C.

The USF300 Series resistors are manufactured with an alumina (aluminium oxide) ceramic sandwich that offers exceptional thermal performance.

The excellent thermal conductivity of the alumina sandwich construction provides good heat flow away from the resistor element minimising the temperature rise in the resistor due to power dissipation as compared with "plastic package" low-TC resistors.

This provides extremely stable operating performance as power is applied to the low-TC resistor.

USF300 Series resistors are available in standard resistance values that are used in high accuracy, precision analogue designs.

Typical applications include amplifier gain setting, bridge circuits, weighing systems, strain gauge circuits, reference resistors, and precision voltage dividers with input voltages up to 2500V.

Custom products based on the USF300 Series include matched resistor pairs and sets with ratio temperature coefficient as tight as 0.5ppm/C for equal resistance values.