The problem is a design defect, and although a common engineering error, it is preventable. This occurs when a relatively heavy electronic component is mounted such that the solder in the soldered connections is required to provide the mechanical mounting strength. A better design in THESE cases would be mounting hardware attaching the relays to the PCB's. A practical fix for the bad design is to 'suck' off the solder, wrap a smaller gauge solid wire around the terminal post, leaving the ends flush across to the solder pad surface. Trim and solder all. This returns some mechanical strength to the joint.

Steve

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