Portable Connector Chapter 12: Appendix
Page 61 TTN169162-D02
The IEC uses a different formula dependent on the ferrule diameter and a function of both Radius of
Curvature and Apex Offset.
• For the Ferrule Diameter 1.25 mm, the following shows the relationship:
Where is Fiber Undercut, is Radius of Curvature, and is Apex Offset
• For the Ferrule Diameter 2.50 mm, the following shows the relationship:
Where is Fiber Undercut, is Radius of Curvature, and is Apex Offset