Active Components

Voltage Regulators
IK Semi, Vishay, Toshiba, Texas Instruments, ST Micro, Taiwan Semi, Skywork, Silicon Lab, Sharp, Rohms, Panasonic, On Semi, NXP, Microchip, KEC, Maxim, Linear Tech, Infineon, IDT, Fujitsu, Diodes Inc, Cypress, Analog Device

Diodes, Rectifiers
AVX, Bourns, Cree, Diodes Inc, KEC, Infineon, Littelfuse, NXP, Diotec, On Semi, Panasonic, Rohm, ST Micro, Texas Instruments, Toshiba, Vishay, WeEn

Thyristors, TRIACs
Bourns, Sanrex, Littefuse, Microsemi, NXP, On Semi, Renesas, Sanken, ST Micro, WeEn

Transistors, BJT, MOSFETs, IGBTs
KEC, Infineon, Microsemi, On Semi, Powerex, Sanrex, ST Micro, Vishay, Littelfuse

Power Semiconductors, Modules
IK Semi, KEC, Infineon, On Semi, Powerex, Rohm, ST Micro, Vishay

Sensors
AD Semi, ETC, Honeywell, Atmel, Cypress, Holtek, SICK, Panasonic, Rohm, Omron, Murata, Infineon

Memory - SRAM
Samsung, Netsol, ISSI, Cypress, Hynix, Micron, Qimonda, Omron, Viking, Xilinx, Microsemi, ATP, Advantech

LED Drivers ICs
IK Semi, Linear Tech/Analog Devices, Mean Well, Recom, TDK, Wurth

Linear / Power Amplifiers
Analog Devices, Cirrus Logic, Diode Inc, IK Semi, Infineon, Maxim, Microchip, Mircosemi, NXP, Panasonic, On Semi, Rohm, Silicon Lab, ST Micro, Texas Instrument, Toshiba, KEC

Wireless Components, RF Antennas, RF Filters
YiChip, Rohm, Infineon, Cypress, Avago, Microchip, Texas Instrument, Panasonic, NXP/Freescale, NIC Components, Yageo