Through-hole: what it means.
Through-hole components have leads that pass through pre-drilled holes in a PCB and are commonly soldered in place. The joint provides electrical connection and mechanical attachment. (DigiKey: mounting and package terminology)
Surface-mount components connect to pads at the board surface. The two mounting methods describe physical assembly, so neither tells you by itself what circuit function a component performs. (DigiKey: mounting and package terminology)
Put the definition to work.
A DIP is a familiar through-hole IC package. When converting a prototype into a board design, keep the package choice separate from the circuit’s electrical requirements.
Questions to ask next.
Use these questions as a reading checklist, not as a device-selection recommendation. Exact manufacturer documentation takes priority over a general definition.
- Hole pattern and lead dimensions
- Orientation and electrical connections
- Assembly and soldering requirements
For the broader explanation, explore the complete integrated circuits guide. This page defines the term; the companion guide connects it to the rest of the system.
Common Through-hole questions.
Can a PCB contain both mounting methods?
Yes. Board-level assembly may use different package and mounting styles. Review each component’s footprint and the board’s assembly plan rather than assuming one uniform mounting method. (DigiKey: mounting and package terminology)