USF300 Series Film Resistors

Caddock's film resistors well suited for demanding precision analog electronics applications

Image of Caddock Electronics' USF300 Series Film ResistorsCaddock Electronics' USF300 series of film resistors provides a wide resistance range of 50 Ω to 25 MΩ. These resistors are available in three models: USF340 (300 V, 0.33 W), USF370 (1400 V, 0.75 W), and USF371 (2500 V, 0.75 W).

The USF300 series resistors are manufactured with an aluminum oxide (alumina) ceramic sandwich that offers exceptional thermal performance. The thermal conductivity of the alumina package provides good heat flow away from the resistor element, minimizing the temperature rise in the resistor. This is contrary to plastic molded low TC foil resistors, which cannot provide these thermal benefits.

General Specifications
  • Voltage ratings: 300 V to 2500 V at +85°C
  • Power ratings: 0.33 W to 0.75 W at +85°C
  • Temperature coefficient: maximum ±5ppm/°C, -40°C to +85°C, ref. to +25°C
  • Resistance values: 50 Ω to 25 MΩ
  • Tolerances: ±0.01% or ±0.10%
  • Load life stability: 2,000 hours at rated voltage/power at +85°C, %ΔR (+0.015% ±0.015%) maximum

USF Series

ImageManufacturer Part NumberDescriptionPart StatusResistanceAvailable QuantityView Details
USF340-5.00M-0.01%-5PPM datasheet linkRES 5M OHM 1/3W 0.01% RADIALUSF340-5.00M-0.01%-5PPMRES 5M OHM 1/3W 0.01% RADIALActive5 MOhms237 - Immediate
USF340-5.00M-0.01%-5PPM product page link
USF340-10.0M-0.01%-5PPM datasheet linkRES 10M OHM 1/3W 0.01% RADIALUSF340-10.0M-0.01%-5PPMRES 10M OHM 1/3W 0.01% RADIALActive10 MOhms282 - Immediate
USF340-10.0M-0.01%-5PPM product page link
USF371-25.0M-0.1%-5PPM datasheet linkRES 25M OHM 3/4W 0.1% RADIALUSF371-25.0M-0.1%-5PPMRES 25M OHM 3/4W 0.1% RADIALActive25 MOhms309 - Immediate
USF371-25.0M-0.1%-5PPM product page link
USF340-20.0M-0.1%-5PPM datasheet linkRES 20M OHM 1/3W 0.1% RADIALUSF340-20.0M-0.1%-5PPMRES 20M OHM 1/3W 0.1% RADIALActive20 MOhms284 - Immediate
USF340-20.0M-0.1%-5PPM product page link
USF340-20.0M-0.01%-5PPM datasheet linkRES 20M OHM 1/3W 0.01% RADIALUSF340-20.0M-0.01%-5PPMRES 20M OHM 1/3W 0.01% RADIALActive20 MOhms292 - Immediate
USF340-20.0M-0.01%-5PPM product page link
USF340-1.00M-0.01%-5PPM datasheet linkRES 1M OHM 1/3W 0.01% RADIALUSF340-1.00M-0.01%-5PPMRES 1M OHM 1/3W 0.01% RADIALActive1 MOhms118 - Immediate
USF340-1.00M-0.01%-5PPM product page link
USF340-20.0K-0.01%-5PPM datasheet linkRES 20K OHM 1/3W 0.01% RADIALUSF340-20.0K-0.01%-5PPMRES 20K OHM 1/3W 0.01% RADIALActive20 kOhms148 - Immediate
USF340-20.0K-0.01%-5PPM product page link
USF370-1.00M-0.1%-5PPM datasheet linkRES 1M OHM 3/4W 0.1% RADIALUSF370-1.00M-0.1%-5PPMRES 1M OHM 3/4W 0.1% RADIALActive1 MOhms204 - Immediate
USF370-1.00M-0.1%-5PPM product page link
USF370-5.00M-0.1%-5PPM datasheet linkRES 5M OHM 3/4W 0.1% RADIALUSF370-5.00M-0.1%-5PPMRES 5M OHM 3/4W 0.1% RADIALActive5 MOhms495 - Immediate
USF370-5.00M-0.1%-5PPM product page link
USF340-10.0M-0.1%-5PPM datasheet linkRES 10M OHM 1/3W 0.1% RADIALUSF340-10.0M-0.1%-5PPMRES 10M OHM 1/3W 0.1% RADIALActive10 MOhms93 - Immediate
USF340-10.0M-0.1%-5PPM product page link
USF340-50.0K-0.01%-5PPM datasheet linkRES 50K OHM 1/3W 0.01% RADIALUSF340-50.0K-0.01%-5PPMRES 50K OHM 1/3W 0.01% RADIALActive50 kOhms91 - Immediate
USF340-50.0K-0.01%-5PPM product page link
USF340-200K-0.01%-5PPM datasheet linkRES 200K OHM 1/3W 0.01% RADIALUSF340-200K-0.01%-5PPMRES 200K OHM 1/3W 0.01% RADIALActive200 kOhms90 - Immediate
USF340-200K-0.01%-5PPM product page link
USF370-2.00M-0.01%-5PPM datasheet linkRES 2M OHM 3/4W 0.01% RADIALUSF370-2.00M-0.01%-5PPMRES 2M OHM 3/4W 0.01% RADIALActive2 MOhms62 - Immediate
USF370-2.00M-0.01%-5PPM product page link
USF370-10.0M-0.01%-5PPM datasheet linkRES 10M OHM 3/4W 0.01% RADIALUSF370-10.0M-0.01%-5PPMRES 10M OHM 3/4W 0.01% RADIALActive10 MOhms59 - Immediate
USF370-10.0M-0.01%-5PPM product page link
USF371-25.0M-0.01%-5PPM datasheet linkRES 25M OHM 3/4W 0.01% RADIALUSF371-25.0M-0.01%-5PPMRES 25M OHM 3/4W 0.01% RADIALActive25 MOhms43 - Immediate
USF371-25.0M-0.01%-5PPM product page link
USF340-20.0K-0.1%-5PPM datasheet linkRES 20K OHM 1/3W 0.1% RADIALUSF340-20.0K-0.1%-5PPMRES 20K OHM 1/3W 0.1% RADIALActive20 kOhms34 - Immediate
USF340-20.0K-0.1%-5PPM product page link
USF340-2.00M-0.01%-5PPM datasheet linkRES 2M OHM 1/3W 0.01% RADIALUSF340-2.00M-0.01%-5PPMRES 2M OHM 1/3W 0.01% RADIALActive2 MOhms30 - Immediate
USF340-2.00M-0.01%-5PPM product page link
USF370-10.0M-0.1%-5PPM datasheet linkRES 10M OHM 3/4W 0.1% RADIALUSF370-10.0M-0.1%-5PPMRES 10M OHM 3/4W 0.1% RADIALActive10 MOhms9 - Immediate
USF370-10.0M-0.1%-5PPM product page link
USF371-20.0M-0.1%-5PPM datasheet linkRES 20M OHM 3/4W 0.1% RADIALUSF371-20.0M-0.1%-5PPMRES 20M OHM 3/4W 0.1% RADIALActive20 MOhms50 - Immediate
USF371-20.0M-0.1%-5PPM product page link
USF370-1.00M-0.01%-5PPM datasheet linkRES 1M OHM 3/4W 0.01% RADIALUSF370-1.00M-0.01%-5PPMRES 1M OHM 3/4W 0.01% RADIALActive1 MOhms29 - Immediate
USF370-1.00M-0.01%-5PPM product page link
View More
Published: 2012-06-29