Definition
What is TO-220 in electronics sourcing?
A through-hole power package with a metal tab for heat-sinking, used for regulators, MOSFETs, and rectifiers. Its surface-mount equivalent is the D2PAK, so package must match when substituting a part on a BOM.
Related terms
Every part on your BOM, resolved automatically.
O2 reads a bill of materials end to end: it normalizes part numbers, checks lifecycle and compliance on every line, finds alternates, and drafts the quote.