Bourns^® Model 3549

In line with our commitment to provide continuous improvement of our technologies and designs, Bourns^® Sensors and Controls Division is pleased to announce the long-awaited release of the new Model 3549 10-Turn Precision Potentiometer. This new model is built utilizing our classic wirewound and Hybritron^® technologies including new product enhancements, process improvements and newly added options to provide a more reliable product with superior performance.

This model will provide a higher-grade alternative to our legacy Models 3540, 3541, 3543 and 3545. Product enhancements of the new model over the legacy product are:

The cover that houses the element and lid is heat staked to provide a better environmental seal.

The bushing is molded into the front lid rather than assembled to the housing with a metal strap.

The bearing surface between the rotor and the front cover has been improved to provide a longer wearing surface.

The bushing has been upgraded to a brass and bronze bearing surface for better wear characteristics under side load.

A tighter resistance tolerance on new resistive wire for better electrical performance.

A new bondable mandrel holds the resistive wire in place to provide uniform spacing and better electrical performance.

A newly designed contact spring provides increased rotational life.

Higher-grade plastics have been selected for a more robust package and better performance of internal mechanical assemblies.

The solder terminal thickness has been increased to provide a more robust terminal.

Higher-grade grease and lubricants have been selected for smooth rotational shaft feel and for low temperature operation.

In addition to these enhancements, this new model is RoHS compliant in accordance with Directive 2002/95/EC on the restriction of the use of certain hazardous substances (RoHS) in electrical and electronic equipment.

For detailed information please contact your local SPOERLE Branch Office.

© SPOERLE 2008