What is the minimum angle requirement for clinched lead terminations in unsupported holes?

The minimum angle requirement for clinched lead terminations in unsupported holes is 45 degrees. This specification is important because it ensures that the clinching provides adequate mechanical strength and electrical connection reliability. A clinched termination at this angle helps distribute the mechanical stress over a wider area, reducing the risk of lead breakage or excessive force on the connection point when the assembly undergoes thermal or mechanical cycling.

Additionally, a 45-degree angle allows for better control during the clinching process, leading to a more reliable connection. Angles smaller than 45 degrees might not provide sufficient support for the lead, while larger angles could complicate the placement and manufacturing processes, making it less efficient. Understanding these requirements is crucial for achieving optimal performance of soldered assemblies in electronic applications.