Sprague-Goodman Part Numbering System

The Sprague-Goodman parts are numbered by Dielectric, Form Factor, Cap Code, and Modifications. Take the example of GXA9R000, a plastic capacitor. The part number is divided into four important categories:

GX A 9R0 00
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Dielectric Form Factor Cap Code Modifications

Dielectric:

The advantages and disadvantages of the various dielectrics are detailed above. Use the dropdown menus below to identify which part numbers signify which dielectrics.

Form Factor:

The form factor refers to the physical dimensions of the trimmer cap, as well as the placement of the adjusting screw (Top/Bottom or Side). If only a single digit is written then the capacitor has square dimensions. “8 mm” for example refers to “8x8 mm.”

Cap Code:

The cap code is a three digit number that identifies the capacitance of a capacitor. The first two digits are significant, and the third digit is the number of trailing zeroes. For example, 202 would be 2000 pF. An R indicates a decimal point, so 1R6 = 1.6 pF.

Modifications:

Various modifications that can for example, change the number or positioning of the leads. More information can be provided in the Sprague-Goodman catalogs.

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