Caddock USF270 Series

The USF270 series from Caddock are ultra-stable low temperature coefficient (TCR) film resistors, with a resistance range of between 990KΩ and 5MΩ, low TCR of ±2 ppm/°C and with a tolerance of ±0.01% or ±0.1%. The USF270 are constructed with two selected USF300 series resistors bonded back to back for parallel connection on the PCB and using a ceramic package provides cool operation. Utilising Caddock proprietary resistance film systems, they provide the lowest TCR and the highest voltage ratings available in the industry.

• Ultra-stable radial leaded film through-hole resistors
• Resistance values available are between 990KΩ and 5MΩ
• TCR of ±2 ppm/°C
• Tolerance of ±0.01% or ±0.1%
• Temperature range -40°C to +85°C
• Maximum working voltage of 1,400V
• Ceramic package provides cool operation
• Maximum power rating of 0.75W at +85°C
• Utilising Caddock’s proprietary resistance film systems

The USF Ultra-Stable Resistors are offered in standard resistance values that are most commonly used in precision analog design and can be used in

• Precise amplifier gain setting
• Precise resistor bridge circuits
• Precise transducer sense circuits
• Precise voltage dividers with up to 2500 volt input voltage

The below table gives the specifications available for the complete USF series including the USF270 model: