Why Crimped Connector Mechanics Failure?

Posted by Francisco Javier Aparicio Rebollo
On September 21, 2020
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Crimped connectors are extensively present in EEE systems because of the good performance and easier installation at reduced dimension. Due to the key role played, they are required to have high durability even under harsh operating conditions. In the case of unexpected/early failure, thorough diagnosis and deep understanding of the main failure causes are the starting point to preclude future occurrence and improve the system reliability.

Which are the improper degrees of Crimped Connectors?

Posted by Francisco Javier Aparicio Rebollo
On August 21, 2020
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Stress relaxation: decrease of the contact pressure held between the wires and at the wire-barrel interface, Improper crimping: neither damage the insulation of the wire strands nor to leave insulator residues over the stripped conductor. Diagnosis tools: improper degree of compression and related issues can be detected either

Plating Thickness Testing Overview in Alter Technology Lab.

Posted by Mari Carmen López
On July 28, 2020
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Cross-sectioned ceramic capacitors were metallographically prepared in the Materials & Processes Laboratory, recognized as a recommended facility for such activity by the ESA authority (MEMO ESA-TECMSP-MO-013165).

Crimped Connectors, What about Reliability and Testing?

Posted by Mari Carmen López
On January 13, 2020
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Crimping together with wire wrapping and spring clip systems are the preferred alternatives for the solderless connection of electrical conductors. In particular, crimped connectors offer several advantages such as: Gas-tightness and protection against oxidation and corrosive environments, High mechanical strength is inherent to the lack of alloys in the mechanical joint, Large versatility in terms of the wire diameters.

Different types of Corrosion / Contamination in Crimped Connectors

Posted by Francisco Javier Aparicio Rebollo
On March 14, 2019
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Crimped connectors are gas-tight junctions ideally protected against environmental contaminants and corrosive agents. Nonetheless inappropriate crimping and inherent connector and wire defects reduce this protection. Thus, depending of the storage atmosphere, non-conducting corrosion products can be formed, or stress corrosion cracking can be eventually induced. The former act as insolation layer that reduces the connector conductivity and both corrosion effects are identified as critical factors involved in common fails reported for electrical connectors.

What does Electrothermal events in Crimped Connectors refer to?

Posted by Francisco Javier Aparicio Rebollo
On February 21, 2019
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Electrothermal events. Electrothermal event refers to abnormal temperature increase leading to malfunction or catastrophic fails. The high temperature reached during such event activates or initiates some of the failure mechanism explained before, such as the growth of insulation oxide layers and outgassing processes responsible for organic contamination. Besides the formation of nonconductive layers at the contact interface, high temperature can also cause to the degradation of plastic insulators and contribute to multiple short circuit conditions.