Power Electronic Packaging: Design, Assembly Process, Reliability and Modeling. Springer Science & Business Media. p. 184. ISBN 978-1-4614-1053-9. ↑ List of package types, https://www.fairchildsemi.com/evaluate/package-specifications/ ↑ http://www.irf.com/technical-info/appnotes/an-1000.pdf ↑ "Power MOSFETs and IGBTs", Bill Travis, EDN: "[…] and the TO-257 is a hermetic TO-220." ↑ http://www.nxp.com/packages/SOT186.html