| Company name | Category |  | 
              
                | Jabil | Electronics manufacturing services |  | 
              
                | Jacket Micro Devices | Communications ICs (wireless) |  | 
              
                | JAE | PCB connectors |  | 
              
                | Jaltek Systems | Electronics manufacturing services |  | 
              
                | Jaluna | Embedded software and operating systems |  | 
              
                | Jameco Electronics | Power-supply ICs and controllers |  | 
              
                | Japan Servo | Fans and blowers |  | 
              
                | Jaro Thermal | Fans and blowers |  | 
              
                | JBC Industrias | Electronics manufacturing, packaging |  | 
              
                | JBC Tools | Electronics manufacturing materials |  | 
              
                | JDSU | Opto and fibre test equipment |  | 
              
                | Jeda Technologies | Design and development software |  | 
              
                | Jekyll Electronic Technology | Sensors and data acquisition |  | 
              
                | Jenelec | Circuit protection devices |  | 
              
                | Jennic | Communications ICs (wireless) |  | 
              
                | Jenton | Electronics manufacturing materials |  | 
              
                | Jerome Industries | Power supplies |  | 
              
                | Jet PCB | Boards and backplanes |  | 
              
                | JFE Mineral | Electronics manufacturing, packaging |  | 
              
                | JK Microsystems | Embedded computing and control |  | 
              
                | JMC Products | Fans and blowers |  | 
              
                | Jobsite | Recruitment, reports, resources |  | 
              
                | Johanson Technology | Antennas and feeders |  | 
              
                | Johnson Electric World Trade | Electromechanical components |  | 
              
                | Jon Peddie Research | Recruitment, reports, resources |  | 
              
                | JST | PCB connectors |  | 
              
                | JTAG Technologies | ATE systems |  | 
              
                | Juki Automation Systems | Electronics manufacturing, packaging |  | 
              
                | Julabo Labortechnik | Electronics manufacturing, packaging |  | 
              
                | Jumo Instrument | Sensors and data acquisition |  | 
              
                | Jungo | Design and development software |  | 
              
                | Juniper Research | Recruitment, reports, resources |  | 
              
                | Justtech | Electronics manufacturing materials |  |