| Terminology | Reference Symbol | Description |
|---|---|---|
| Nominal dimensions | D x E | Combination of package length D and package width E |
| Package length | D | Largest dimension of the package length excluding terminals |
| Package width | E | Largest dimension of the package width excluding terminals |
| Overall length | HD or HD |
Length from the tip of the terminal to another tip of the terminal on the opposite side |
| Overall width | HE or HE |
Width from the tip of the terminal to another tip of the terminal on the opposite side |
| Seating plane | S | The surface determined when the package is placed on a horizontal surface |
| Seated height | A | Height from the seating plane to the highest point of the package ( including package warp ) |
| 1st standoff height | A1 | Distance from the seating plane to the base plane |
| Package height | A2 | Height from base plane to top edge of package body |
| Standard height of soldered point | A3 | Standard height 0.25mm from seating plane |
| Terminal pitch | e | Terminal pitch. This represents theoretical reference dimension. |
| Terminal width | b or bp | Width of terminal with plating |
| Terminal width | b1 | Width of terminal before plating |
| Terminal thickness | c | Thickness of each terminal(including plating) |
| Terminal thickness | c1 | Thickness of terminal before plating |
| Length of flat part of terminal | L | Projection length of flat part of terminal |
| Length of soldered part | Lp | Effective projected length of terminal attachment defined by standard height of soldered part |
| Terminal length | L1 | Projection length of terminal |
| Tolerance value of terminal center position |  |
Positional tolerance for center axis of the terminal on seating plane. Using the maximum material principle, show the tolerance for maximum terminal width. When terminal width is narrow, allowable tolerance is increased by the difference with the maximum width. |
| Coplanarity | y | Uniformity of the bottom-most surface of the terminal relative to the datum S (seating plane) |
| Angle of terminal flat portions | θ | Angle between flat part of terminal and seating plane |
| Package overhang | ZD or ZD |
Distance from the true position of the outer-most terminal to the package edge |
| Widthwise overhang Package overhang |
ZE or ZE |
Distance from the true position of the outer-most terminal to the package edge |