Bourns Precision Current Sense Resistor Line Offers New Smaller Package Sizes that Match Mobile Device Requirements

Model CFN Metal Foil Current Sense Resistor Series is now available in 0402 and 0603 package sizes and a ±50 ppm/°C TCR option

RIVERSIDE, Calif., June 23, 2021 - Bourns, Inc., a leading manufacturer and supplier of electronic components, today announced the availability of smaller package sizes and feature options in its Model CFN Metal Foil Current Sense Resistor Series. New miniature 0402 and 0603 packages were introduced to the Model CFN series as well as a lower TCR option of ±50 ppm/°C in the 0603 and larger package sizes. Using Bourns’ metal foil technology construction enables the new current sense resistors to provide low TCR, low inductance, low noise, excellent reliability and very low resistance values. These attributes make the Model CFN series an optimal current sensing solution for power supply, stepper motor drive, and input amplifier applications. The new smaller sizes are particularly well-suited to meet the space-constrained requirements of mobile device designs.

Ever important in current sensing is having a suitably low TCR, which is determined by characteristics such as the materials used in the resistive element, power rating, and physical size of the component. Bourns has leveraged metal foil technology to achieve lower resistance values, ranging from 5 to 40 milliohms, and still provide power ratings of 0.25 to 1 W in components small enough for mobile applications. Combining the new ±50 ppm/°C option with the low resistance values helps minimize self-heating so the resistor remains reliable and stays within its 1-5 percent tolerance over time.

The structure and mounting style of the Model CFN series is beneficial as well. Placing a metal foil resistive element on the bottom side of the ceramic substrate shortens the thermal pathway and improves heat dissipation characteristics. The rear mount style helps prevent surface damage during assembly that otherwise could cause a short. The expanded offering meets the demands of an increasing mobile market and delivers reliability and stability on all fronts.

The Bourns® Model CFN Metal Foil Current Sense Resistor Series is available now in all variations, and is RoHS compliant* and halogen free**. For more detailed product information, please see:

*RoHS Directive 2015/863, Mar 31, 2015 and Annex.

**Bourns considers a product to be "halogen free" if (a) the Bromine (Br) content is 900 ppm or less; (b) the Chlorine (Cl) content is 900 ppm or less; and (c) the total Bromine (Br) and Chlorine (Cl) content is 1500 ppm or less.

About Bourns

Bourns, Inc., is a leading manufacturer and supplier of position and speed sensors, circuit protection solutions, magnetic components, microelectronic modules, panel controls and resistive products. Headquartered in Riverside, California, USA, Bourns serves a broad range of markets, including automotive, industrial, consumer, communications, non-critical life support medical (low/medium risk), audio and various other market segments. Additional company and product information is available at

Bourns® and the Bourns logo are registered trademarks of Bourns, Inc. and may be used only with the permission of Bourns and proper acknowledgement. Other listed names and brands are trademarks or registered trademarks of their respective owners.

Bourns® products have not been designed for and are not intended for use in "lifesaving," "life-critical" or "life-sustaining" applications nor any other applications where failure or malfunction of the Bourns® product may result in personal injury or death. See Legal Disclaimer Notice

Agency Contact:
Annette Keller
Keller Communication
Company Contact:
David Scofield
Bourns, Inc.
(951) 781-5054
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