Halo
     Hamlin
     Hammamatsu
     Hammond Manufacturing
     Hantronix
     Harbour Industries
     Har-Ken Specialties
     Harting
     Harwin
     Hasco Components
     Hawker Energy Products
     Hawker Eternacell
     HEC, Hooray
     Hecon-Hengstler
     Hewlett Packard (components)
     Hewlett Packard (RF Products)
     Heyco
     Hi - Sincerity
     Hi -Rel Capacitors
     HI-Q
     Hirose
     Hitachi
     Hitachi Metals
     Hitachi Semiconductor
     Hi-Tron
     HNC International
     Hobart Electronics
     Hoffman Products
     Hollandse "Robgee" Signaalapparaten (HSA) Hollingsworth
     Holt Integrated Circuits
     Holtek

     Honeywell Micro switch
     Hosonic
     Hp Components
     HTC Korea
     Hubbell
     Huber & Schner
     Hug Electronics
     Huntington Electric
     Hypertronics
     Hyundai