From $2.41 • 1 k+ units available from DigiKey
USB Bridge, USB to SMBus USB 2.0 SMBus Interface 24-QFN (4x4)
From $0.15 • 10 k+ units available from DigiKey
18.1V 120A Varistor 1 Circuit Surface Mount, MLCV 0805 (2012 Metric)
CASS B BLK/WHT B580 1.12