Crimp Terminals

Comprehensive Analysis of Terminal Types: Structure, Principle, and Applications

Terminals are core components for achieving electrical connections. Based on application scenarios and functional differences, they can be categorized into multiple types, including ​​crimp terminals, solder terminals, plug-in terminals, and spring terminals​​. Below is a detailed explanation covering their structure, working principles, application scenarios, and specification dimensions.

1. Crimp Terminals (Press-Fit Terminals)​​

​​Structure​​: Composed of a metal terminal strip and an insulating housing. The metal terminal strip is typically made of copper alloy and formed into specific shapes (e.g., U-shaped, fork-shaped) through stamping or forging processes. The housing is usually made of high-temperature-resistant plastic. ​​Working Principle​​: A dedicated crimping tool is used to tightly compress the terminal strip and the wire, leveraging the plastic deformation of the metal (e.g., cold crimping) to form a permanent mechanical and electrical connection. The wire is enclosed within the terminal strip, and a low-impedance conductive path is achieved through contact pressure. ​​Application Scenarios​​: Automotive wiring harnesses, internal wiring of household appliances, power connections of industrial equipment, and other scenarios requiring high reliability where welding is inconvenient. For example, high-voltage wiring harnesses in the engine compartment of automobiles are connected via crimp terminals to avoid damage to the insulation layer caused by the high temperatures of welding. ​​Specification Dimensions​​:

• ​​Wire Cross-Sectional Area Range​​: 0.1 mm² to 10 mm² (suitable for wires ranging from thin headphone cables to thick industrial cables);
• ​​Terminal Strip Width​​: 1.5 mm to 10 mm;
• ​​Crimp Height​​: 2 mm to 8 mm.