USF270 Caddock Resistor (Other) In Stock

Name: USF270
Brand: Caddock
SKU: USF270
Availability: InStock

Caddock USF270 is an ultra-stable low temperature coefficient film resistor in the USF series, offering TCR as low as 5 ppm/°C and resistance tolerances down to 0.01%. Features non-inductive film element construction suitable for precision DC and AC circuits. Available with worldwide shipping for high-accuracy instrumentation, metrology, and reference circuit applications.

ACTIVEResistorVerified Jun 2026

Package / Visual Reference

USF270Other

Quick Facts

Manufacturer: Caddock
Package: Other
Pin Count: 4
Lifecycle: ACTIVE
Datasheet: USF270 Datasheet PDF
Category: Resistor
RoHS: Compliant
Lead Time: 3–7 business days
Shipping: DHL Express · Worldwide

What are the key features of USF270?

Ultra-stable thin film construction with temperature coefficient of resistance (TCR) as low as 5 ppm/°C for precision circuit stability
Resistance tolerance options down to 0.01% enabling highly accurate voltage dividers and reference networks
Non-inductive film element design suitable for both DC precision applications and AC signal-path circuits up to high frequencies

What is USF270 used for?

The Caddock USF270 is used in precision instrumentation amplifiers, metrology reference circuits, and high-accuracy data acquisition front ends where long-term resistance stability and low TCR are critical. Its ultra-stable film construction is also specified in aerospace and industrial calibration equipment requiring resistance values that drift less than 25 ppm over the rated temperature range and operating lifetime.

Compliance & Regulatory

RoHS Status	Compliant
Lead-Free	Yes (Pb-Free)

Where can I find the USF270 datasheet?

USF270 Datasheet Download

Official datasheet from Caddock

What are equivalent replacements for USF270?

No known alternates. Submit an RFQ and our team can suggest alternatives.

Frequently Asked Questions

How does the TCR specification of Caddock USF270 affect measurement accuracy in a precision bridge circuit?

With TCR as low as 5 ppm/°C, the USF270 introduces less than 0.05% resistance change across a 10°C temperature swing in a Wheatstone bridge. This level of thermal stability preserves bridge balance in precision load cell or strain gauge circuits, keeping measurement errors from resistor drift well below the 0.1% threshold that most industrial sensors specify as the acceptable uncertainty floor.

For a precision voltage divider requiring 0.05% accuracy, how does USF270's tolerance grade meet this requirement?

Caddock USF270 is available with resistance tolerance as tight as 0.01%, which provides a 5-times margin relative to the 0.05% divider accuracy target. Combining this tolerance with the 5 ppm/°C TCR ensures the divider ratio remains stable across the operating temperature range, making USF270 suitable for ADC reference ladders and precision gain-setting networks in measurement equipment.

In what ways does the non-inductive construction of USF270 expand its usable frequency range beyond wirewound alternatives?

Wirewound resistors exhibit significant parasitic inductance (typically 0.1 µH to several µH) that causes impedance to rise at frequencies above a few kilohertz, distorting AC circuits. USF270's non-inductive film element eliminates this inductance, keeping impedance flat from DC through radio frequencies and enabling its use in 50 ohm impedance networks, filter tuning elements, and AC calibration loads.

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