Through-hole assembly, once the most common electronic assembly technique, has become rare in a world where tiny components with many connectors are the norm. Through-hole assembly is an excellent choice for producing a high-quality PCB assembly, but it cannot perform well when small size is the top priority. In some instances, particularly in unpredictable or extreme environments where high reliability is important, through-hole assembly is still the best way to go.
Levison Enterprises Blog
Prior to 2006, most of the metallic components in electronic devices were created using tin or lead solder. These materials were reliable, easy to observe and understand and readily available. Assemblies were designed specifically for use with tin/lead solder, including the temperatures required to work with these materials.
If you have held a TV remote control in your hand, punched a button on a microwave or adjusted a digital thermostat, you have interacted with surface mount technology, or SMT. Since the 1980s, nearly all mass-produced electronics are now manufactured using SMT.
SMT and SMD.
These two little acronyms get mixed up a lot in the electronics manufacturing service world. On paper, they only vary by a single letter, but in practice, there’s a lot more separating SMTs and SMDs. Chiefly, one is a process and the other is a device.
Two assembly types are prevalent in electronics manufacturing: through-hole technology (THT) and surface mount technology (SMT). Selection of SMT or THT plays an important role in manufacturing efficiency and cost. This means it is important for customers to be aware of their definitions, differences, and applications.
J Standard, or it’s more official title IPC J-STD-001 is a standard that lists the requirements for the manufacture of electronic assemblies. This standard is published by the IPC as “Requirements for Soldered Electrical and Electronic Assemblies” and includes guidance on materials, manufacturing methods, and verification criteria.
Are you hitting a dead end trying to get your through hole board replaced or fixed?
Many electronic contract manufactures don’t do it anymore.
Though the benefits of surface mount assembly may have largely displaced through hole assembly, there are many applications where through hole assembly could remain the best choice.