Due to the small size of most SMD components, manufacturers are not able to write
the full part number on the case. They use instead a marking code typically
composed of a combination of 2 or 3 letters or digits. When repairing an unknown
electronic board, it becomes so difficult to know what is the exact type of a given
component. This database allows to quickly find the part number of a SMD component
when you have only the marking code.
Showing codes starting with '4I'
Marking
Name
Manufacturer/Case
Function
4I
TPSMW15A
Fagor Electronica
SOD-123W
SOD-123W
Transient voltage supressor
Vrm=12.8V, Vbr=14.3..15.8V, Ipp=14.2A, 300W
Vrm=12.8V, Vbr=14.3..15.8V, Ipp=14.2A, 300W
4IA
FT521IAa
Fremont Micro Devices
SOT-23-6L
SOT-23-6L
Linear voltage regulator IC
LDO, Dual out, Vo1/Vo2=3.0V/1.2V±2%, 250mA, +CE
LDO, Dual out, Vo1/Vo2=3.0V/1.2V±2%, 250mA, +CE
4IA
FT521IAb
Fremont Micro Devices
SOT-89-5
SOT-89-5
Linear voltage regulator IC
LDO, Dual out, Vout1/Vout2=3.0V/1.2V±2%, 250mA, +CE
LDO, Dual out, Vout1/Vout2=3.0V/1.2V±2%, 250mA, +CE
4IB
FT521IBa
Fremont Micro Devices
SOT-23-6L
SOT-23-6L
Linear voltage regulator IC
LDO, Dual out, Vo1/Vo2=3.0V/1.3V±2%, 250mA, +CE
LDO, Dual out, Vo1/Vo2=3.0V/1.3V±2%, 250mA, +CE
4IB
FT521IBb
Fremont Micro Devices
SOT-89-5
SOT-89-5
Linear voltage regulator IC
LDO, Dual out, Vout1/Vout2=3.0V/1.3V±2%, 250mA, +CE
LDO, Dual out, Vout1/Vout2=3.0V/1.3V±2%, 250mA, +CE
4IC
FT521ICa
Fremont Micro Devices
SOT-23-6L
SOT-23-6L
Linear voltage regulator IC
LDO, Dual out, Vo1/Vo2=3.0V/1.5V±2%, 250mA, +CE
LDO, Dual out, Vo1/Vo2=3.0V/1.5V±2%, 250mA, +CE
4IC
FT521ICb
Fremont Micro Devices
SOT-89-5
SOT-89-5
Linear voltage regulator IC
LDO, Dual out, Vout1/Vout2=3.0V/1.5V±2%, 250mA, +CE
LDO, Dual out, Vout1/Vout2=3.0V/1.5V±2%, 250mA, +CE
4ID
FT521IDa
Fremont Micro Devices
SOT-23-6L
SOT-23-6L
Linear voltage regulator IC
LDO, Dual out, Vo1/Vo2=3.0V/1.8V±2%, 250mA, +CE
LDO, Dual out, Vo1/Vo2=3.0V/1.8V±2%, 250mA, +CE
4ID
FT521IDb
Fremont Micro Devices
SOT-89-5
SOT-89-5
Linear voltage regulator IC
LDO, Dual out, Vout1/Vout2=3.0V/1.8V±2%, 250mA, +CE
LDO, Dual out, Vout1/Vout2=3.0V/1.8V±2%, 250mA, +CE
4IE
FT521IEa
Fremont Micro Devices
SOT-23-6L
SOT-23-6L
Linear voltage regulator IC
LDO, Dual out, Vo1/Vo2=3.0V/2.5V±2%, 250mA, +CE
LDO, Dual out, Vo1/Vo2=3.0V/2.5V±2%, 250mA, +CE
4IE
FT521IEb
Fremont Micro Devices
SOT-89-5
SOT-89-5
Linear voltage regulator IC
LDO, Dual out, Vout1/Vout2=3.0V/2.5V±2%, 250mA, +CE
LDO, Dual out, Vout1/Vout2=3.0V/2.5V±2%, 250mA, +CE
4IF
FT521IFa
Fremont Micro Devices
SOT-23-6L
SOT-23-6L
Linear voltage regulator IC
LDO, Dual out, Vo1/Vo2=3.0V/2.7V±2%, 250mA, +CE
LDO, Dual out, Vo1/Vo2=3.0V/2.7V±2%, 250mA, +CE
4IF
FT521IFb
Fremont Micro Devices
SOT-89-5
SOT-89-5
Linear voltage regulator IC
LDO, Dual out, Vout1/Vout2=3.0V/2.7V±2%, 250mA, +CE
LDO, Dual out, Vout1/Vout2=3.0V/2.7V±2%, 250mA, +CE
4IG
FT521IGa
Fremont Micro Devices
SOT-23-6L
SOT-23-6L
Linear voltage regulator IC
LDO, Dual out, Vo1/Vo2=3.0V/2.8V±2%, 250mA, +CE
LDO, Dual out, Vo1/Vo2=3.0V/2.8V±2%, 250mA, +CE
4IG
FT521IGb
Fremont Micro Devices
SOT-89-5
SOT-89-5
Linear voltage regulator IC
LDO, Dual out, Vout1/Vout2=3.0V/2.8V±2%, 250mA, +CE
LDO, Dual out, Vout1/Vout2=3.0V/2.8V±2%, 250mA, +CE
4IH
FT521IHa
Fremont Micro Devices
SOT-23-6L
SOT-23-6L
Linear voltage regulator IC
LDO, Dual out, Vo1/Vo2=3.0V/2.85V±2%, 250mA, +CE
LDO, Dual out, Vo1/Vo2=3.0V/2.85V±2%, 250mA, +CE
4IH
FT521IHb
Fremont Micro Devices
SOT-89-5
SOT-89-5
Linear voltage regulator IC
LDO, Dual out, Vout1/Vout2=3.0V/2.85V±2%, 250mA, +CE
LDO, Dual out, Vout1/Vout2=3.0V/2.85V±2%, 250mA, +CE
4II
FT521IIa
Fremont Micro Devices
SOT-23-6L
SOT-23-6L
Linear voltage regulator IC
LDO, Dual out, Vo1/Vo2=3.0V/3.0V±2%, 250mA, +CE
LDO, Dual out, Vo1/Vo2=3.0V/3.0V±2%, 250mA, +CE
4II
FT521IIb
Fremont Micro Devices
SOT-89-5
SOT-89-5
Linear voltage regulator IC
LDO, Dual out, Vout1/Vout2=3.0V/3.0V±2%, 250mA, +CE
LDO, Dual out, Vout1/Vout2=3.0V/3.0V±2%, 250mA, +CE
4IJ
FT521IJa
Fremont Micro Devices
SOT-23-6L
SOT-23-6L
Linear voltage regulator IC
LDO, Dual out, Vo1/Vo2=3.0V/3.3V±2%, 250mA, +CE
LDO, Dual out, Vo1/Vo2=3.0V/3.3V±2%, 250mA, +CE
4IJ
FT521IJb
Fremont Micro Devices
SOT-89-5
SOT-89-5
Linear voltage regulator IC
LDO, Dual out, Vout1/Vout2=3.0V/3.3V±2%, 250mA, +CE
LDO, Dual out, Vout1/Vout2=3.0V/3.3V±2%, 250mA, +CE
4IK
FT521IKa
Fremont Micro Devices
SOT-23-6L
SOT-23-6L
Linear voltage regulator IC
LDO, Dual out, Vo1/Vo2=3.0V/3.6V±2%, 250mA, +CE
LDO, Dual out, Vo1/Vo2=3.0V/3.6V±2%, 250mA, +CE
4IK
FT521IKb
Fremont Micro Devices
SOT-89-5
SOT-89-5
Linear voltage regulator IC
LDO, Dual out, Vout1/Vout2=3.0V/3.6V±2%, 250mA, +CE
LDO, Dual out, Vout1/Vout2=3.0V/3.6V±2%, 250mA, +CE