P ANEL C ONTROLS

SC1461

December, 2014

Bourns® Model 51/53 Series Panel Controls

Change to Terminal Material

The terminal material in the Bourns® Model 51/53 Series Panel Controls is being changed from

CI 100 1/2 Hard Copper Alloy (tensile strength: 35-45 KSI) to CA 510 Phosphor Bronze (tensile

strength: 76-91 KSI). The terminal design within the housing is also being modified to add material

for improved bend strength. The external terminal dimensions will remain unchanged.

This change is being implemented to improve the tensile strength of the terminal. This change does

not affect form, fit or function of the product. However, this change should improve the quality and

reliability of the terminal.

This material change has been qualified and approved by Engineering, Product Management and

Production for implementation in standard catalog and customer-specific part numbers. This change

meets current published performance specifications. Evaluation samples are available upon request.

For the complete list of affected part numbers please refer to Table 1 on the following pages.

Implementation dates are as follows:

Last time buy date: March 6, 2015

Date that manufacturing of existing product will cease: March 31, 2015

Date that deliveries of modified products will begin: April 1, 2015

First date code using the above changes: 1513

If you have any questions or need additional information, please feel free to contact Customer

Service/Inside Sales.