USB ESD protection, ESD protection circuit, ESD protection equipment

 ESDALC Series 4 Channel 6.1V Uni-Directional Transil™ ESD Protection - SOT-666IP

https://www.futureelectronics.com/p/electromechanical--circuit-protection--esd-protection/esdalc6v1p6-stmicroelectronics-2113252