The ultimate SMD marking codes database

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 '4U'

Marking
Name
Manufacturer/Case
Function
4U
2SC6036
Panasonic
SSSMini3-F1
NPN transistor
AF-Amp, 15V, 500mA, 100mW, 200MHz, B=270..680
4U
2SC6037J
Panasonic
SSMini3-F1
NPN transistor
AF-Amp, 15V, 500mA, 125mW, 200MHz, B=270..680
4U
MMVL2105
ON Semiconductor
SOD-323
Capacitance diode
VHF-tuning, 30V, 200mA, 200mW, 13.5/16.5pF(4V, 1MHz)
4U
R1210N241C
Ricoh
SOT-23-5
DC/DC voltage converter IC
PWM step-up, 2.4V, 100kHz
4U
R3117K491C
Ricoh
DFN1010-4
Voltage detector IC
4.9V±1%, -Reset PPO, Sense
4U
RP101K241D
Ricoh
DFN1612-4
Linear voltage regulator IC
LDO, LN, 2.4V±0.8%, 300mA, +CE, CL
4U
RP173K511B
Ricoh
DFN1010-4
Linear voltage regulator IC
LDO, 5.1V±1%, 150mA, +CE
4U
RQ5RW47CA
Ricoh
SC-82AB
Linear voltage regulator IC
LDO, 4.7V±2%, 150mA
4U
XC6127N45ENR
Torex Semiconductor
SSOT-24
Voltage detector IC
4.5V±0.8%, -Reset ODO, -MR, Rt=800ms
4U
XC6221D3317R
Torex Semiconductor
USPN-4
Linear voltage regulator IC
LDO, 3.3V±1%, 200mA, +CE, CL, PDR
4U
XC6221D331NR
Torex Semiconductor
SSOT-24
Linear voltage regulator IC
LDO, 3.3V±1%, 200mA, +CE, CL, PDR
4U
XC6223E3519R-G
Torex Semiconductor
USPQ-4B03
Linear voltage regulator IC
LDO, 3.5V±1%, 300mA, +CE, ICP
4U0
XC6105F631MR
Torex Semiconductor
SOT-25
Voltage detector IC
3.1V±2%, Hst, +Rst PPO, -Rst ODO, Wt=1.6s, Rt=400ms
4U1
XC6105F632MR
Torex Semiconductor
SOT-25
Voltage detector IC
3.2V±2%, Hst, +Rst PPO, -Rst ODO, Wt=1.6s, Rt=400ms
4U2
XC6105F633MR
Torex Semiconductor
SOT-25
Voltage detector IC
3.3V±2%, Hst, +Rst PPO, -Rst ODO, Wt=1.6s, Rt=400ms
4U3
XC6105F634MR
Torex Semiconductor
SOT-25
Voltage detector IC
3.4V±2%, Hst, +Rst PPO, -Rst ODO, Wt=1.6s, Rt=400ms
4U4
XC6105F635MR
Torex Semiconductor
SOT-25
Voltage detector IC
3.5V±2%, Hst, +Rst PPO, -Rst ODO, Wt=1.6s, Rt=400ms
4U5
XC6105F636MR
Torex Semiconductor
SOT-25
Voltage detector IC
3.6V±2%, Hst, +Rst PPO, -Rst ODO, Wt=1.6s, Rt=400ms
4U6
XC6105F637MR
Torex Semiconductor
SOT-25
Voltage detector IC
3.7V±2%, Hst, +Rst PPO, -Rst ODO, Wt=1.6s, Rt=400ms
4U7
XC6105F638MR
Torex Semiconductor
SOT-25
Voltage detector IC
3.8V±2%, Hst, +Rst PPO, -Rst ODO, Wt=1.6s, Rt=400ms
4U8
XC6105F639MR
Torex Semiconductor
SOT-25
Voltage detector IC
3.9V±2%, Hst, +Rst PPO, -Rst ODO, Wt=1.6s, Rt=400ms
4U8
XC9235E08D0R-G
Torex Semiconductor
WLP-5-03
DC/DC voltage converter IC
PWM, st-dwn, 0.8V±2%, 600mA, 3MHz, Vin>1.8V, LSST, CL
4U8
XC9235E08D4R-G
Torex Semiconductor
USP-6EL
DC/DC voltage converter IC
PWM, st-dwn, 0.8V±2%, 600mA, 3MHz, Vin>1.8V, LSST, CL
4U8
XC9235E08DER-G
Torex Semiconductor
USP-6C
DC/DC voltage converter IC
PWM, st-dwn, 0.8V±2%, 600mA, 3MHz, Vin>1.8V, LSST, CL
4U8
XC9235E08DMR-G
Torex Semiconductor
SOT-25
DC/DC voltage converter IC
PWM, st-dwn, 0.8V±2%, 600mA, 3MHz, Vin>1.8V, LSST, CL
4U9
XC6105F640MR
Torex Semiconductor
SOT-25
Voltage detector IC
4.0V±2%, Hst, +Rst PPO, -Rst ODO, Wt=1.6s, Rt=400ms
4U9
XC9235E09D0R-G
Torex Semiconductor
WLP-5-03
DC/DC voltage converter IC
PWM, st-dwn, 0.9V±2%, 600mA, 3MHz, Vin>1.8V, LSST, CL
4U9
XC9235E09D4R-G
Torex Semiconductor
USP-6EL
DC/DC voltage converter IC
PWM, st-dwn, 0.9V±2%, 600mA, 3MHz, Vin>1.8V, LSST, CL
4U9
XC9235E09DER-G
Torex Semiconductor
USP-6C
DC/DC voltage converter IC
PWM, st-dwn, 0.9V±2%, 600mA, 3MHz, Vin>1.8V, LSST, CL
4U9
XC9235E09DMR-G
Torex Semiconductor
SOT-25
DC/DC voltage converter IC
PWM, st-dwn, 0.9V±2%, 600mA, 3MHz, Vin>1.8V, LSST, CL
4UA
SMM4F5.0A
SGS-Thomson Microelectronics
DO-222AA
Transient voltage supressor
Vrwm=5.0V, Vbr=6.46..7.14V, Ipp=174A, 400W(1ms)
4UA
XC6105F641MR
Torex Semiconductor
SOT-25
Voltage detector IC
4.1V±2%, Hst, +Rst PPO, -Rst ODO, Wt=1.6s, Rt=400ms
4UB
SMM4F6.0A
SGS-Thomson Microelectronics
DO-222AA
Transient voltage supressor
Vrwm=6.0V, Vbr=6.65..7.35V, Ipp=170A, 400W(1ms)
4UB
XC6105F642MR
Torex Semiconductor
SOT-25
Voltage detector IC
4.2V±2%, Hst, +Rst PPO, -Rst ODO, Wt=1.6s, Rt=400ms
4UC
SMM4F6.5A
SGS-Thomson Microelectronics
DO-222AA
Transient voltage supressor
Vrwm=6.5V, Vbr=7.13..7.88V, Ipp=160A, 400W(1ms)
4UC
XC6105F643MR
Torex Semiconductor
SOT-25
Voltage detector IC
4.3V±2%, Hst, +Rst PPO, -Rst ODO, Wt=1.6s, Rt=400ms
4UD
SMM4F8.5A
SGS-Thomson Microelectronics
DO-222AA
Transient voltage supressor
Vrwm=8.5V, Vbr=9.5..10.5V, Ipp=124A, 400W(1ms)
4UD
XC6105F644MR
Torex Semiconductor
SOT-25
Voltage detector IC
4.4V±2%, Hst, +Rst PPO, -Rst ODO, Wt=1.6s, Rt=400ms
4UE
SMM4F10A
SGS-Thomson Microelectronics
DO-222AA
Transient voltage supressor
Vrwm=10V, Vbr=11.4..12.6V, Ipp=106A, 400W(1ms)
4UE
XC6105F645MR
Torex Semiconductor
SOT-25
Voltage detector IC
4.5V±2%, Hst, +Rst PPO, -Rst ODO, Wt=1.6s, Rt=400ms
4UF
SMM4F12A
SGS-Thomson Microelectronics
DO-222AA
Transient voltage supressor
Vrwm=12V, Vbr=13.3..14.7V, Ipp=91A, 400W(1ms)
4UF
XC6105F616MR
Torex Semiconductor
SOT-25
Voltage detector IC
1.6V±2%, Hst, +Rst PPO, -Rst ODO, Wt=1.6s, Rt=400ms
4UF
XC6105F646MR
Torex Semiconductor
SOT-25
Voltage detector IC
4.6V±2%, Hst, +Rst PPO, -Rst ODO, Wt=1.6s, Rt=400ms
4UG
SMM4F13A
SGS-Thomson Microelectronics
DO-222AA
Transient voltage supressor
Vrwm=13V, Vbr=14.3..15.8V, Ipp=85A, 400W(1ms)
4UH
SMM4F15A
SGS-Thomson Microelectronics
DO-222AA
Transient voltage supressor
Vrwm=15V, Vbr=17.1..18.9V, Ipp=71A, 400W(1ms)
4UH
XC6105F617MR
Torex Semiconductor
SOT-25
Voltage detector IC
1.7V±2%, Hst, +Rst PPO, -Rst ODO, Wt=1.6s, Rt=400ms
4UH
XC6105F647MR
Torex Semiconductor
SOT-25
Voltage detector IC
4.7V±2%, Hst, +Rst PPO, -Rst ODO, Wt=1.6s, Rt=400ms
4UJ
SMM4F18A
SGS-Thomson Microelectronics
DO-222AA
Transient voltage supressor
Vrwm=18V, Vbr=20.9..23.1V, Ipp=59A, 400W(1ms)
4UK
SMM4F20A
SGS-Thomson Microelectronics
DO-222AA
Transient voltage supressor
Vrwm=20V, Vbr=22.8..25.2V, Ipp=54A, 400W(1ms)
4UK
XC6105F618MR
Torex Semiconductor
SOT-25
Voltage detector IC
1.8V±2%, Hst, +Rst PPO, -Rst ODO, Wt=1.6s, Rt=400ms
4UK
XC6105F648MR
Torex Semiconductor
SOT-25
Voltage detector IC
4.8V±2%, Hst, +Rst PPO, -Rst ODO, Wt=1.6s, Rt=400ms
4UL
XC6105F619MR
Torex Semiconductor
SOT-25
Voltage detector IC
1.9V±2%, Hst, +Rst PPO, -Rst ODO, Wt=1.6s, Rt=400ms
4UL
XC6105F649MR
Torex Semiconductor
SOT-25
Voltage detector IC
4.9V±2%, Hst, +Rst PPO, -Rst ODO, Wt=1.6s, Rt=400ms
4UL
XC9235E0LD0R-G
Torex Semiconductor
WLP-5-03
DC/DC voltage converter IC
PWM, st-dwn, 0.85V±2%, 600mA, 3MHz, Vin>1.8V, LSST, CL
4UL
XC9235E0LD4R-G
Torex Semiconductor
USP-6EL
DC/DC voltage converter IC
PWM, st-dwn, 0.85V±2%, 600mA, 3MHz, Vin>1.8V, LSST, CL
4UL
XC9235E0LDER-G
Torex Semiconductor
USP-6C
DC/DC voltage converter IC
PWM, st-dwn, 0.85V±2%, 600mA, 3MHz, Vin>1.8V, LSST, CL
4UL
XC9235E0LDMR-G
Torex Semiconductor
SOT-25
DC/DC voltage converter IC
PWM, st-dwn, 0.85V±2%, 600mA, 3MHz, Vin>1.8V, LSST, CL
4UM
SMM4F24A
SGS-Thomson Microelectronics
DO-222AA
Transient voltage supressor
Vrwm=24V, Vbr=26.6..29.4V, Ipp=46A, 400W(1ms)
4UM
XC6105F620MR
Torex Semiconductor
SOT-25
Voltage detector IC
2.0V±2%, Hst, +Rst PPO, -Rst ODO, Wt=1.6s, Rt=400ms
4UM
XC6105F650MR
Torex Semiconductor
SOT-25
Voltage detector IC
5.0V±2%, Hst, +Rst PPO, -Rst ODO, Wt=1.6s, Rt=400ms
4UM
XC9235E0MD0R-G
Torex Semiconductor
WLP-5-03
DC/DC voltage converter IC
PWM, st-dwn, 0.95V±2%, 600mA, 3MHz, Vin>1.8V, LSST, CL
4UM
XC9235E0MD4R-G
Torex Semiconductor
USP-6EL
DC/DC voltage converter IC
PWM, st-dwn, 0.95V±2%, 600mA, 3MHz, Vin>1.8V, LSST, CL
4UM
XC9235E0MDER-G
Torex Semiconductor
USP-6C
DC/DC voltage converter IC
PWM, st-dwn, 0.95V±2%, 600mA, 3MHz, Vin>1.8V, LSST, CL
4UM
XC9235E0MDMR-G
Torex Semiconductor
SOT-25
DC/DC voltage converter IC
PWM, st-dwn, 0.95V±2%, 600mA, 3MHz, Vin>1.8V, LSST, CL
4UN
SMM4F26A
SGS-Thomson Microelectronics
DO-222AA
Transient voltage supressor
Vrwm=26V, Vbr=28.5..31.5V, Ipp=43A, 400W(1ms)
4UN
XC6105F621MR
Torex Semiconductor
SOT-25
Voltage detector IC
2.1V±2%, Hst, +Rst PPO, -Rst ODO, Wt=1.6s, Rt=400ms
4UO
SMM4F28A
SGS-Thomson Microelectronics
DO-222AA
Transient voltage supressor
Vrwm=28V, Vbr=31.4..34.7V, Ipp=39A, 400W(1ms)
4UP
XC6105F622MR
Torex Semiconductor
SOT-25
Voltage detector IC
2.2V±2%, Hst, +Rst PPO, -Rst ODO, Wt=1.6s, Rt=400ms
4UQ
SMM4F33A
SGS-Thomson Microelectronics
DO-222AA
Transient voltage supressor
Vrwm=33V, Vbr=37.1..41.0V, Ipp=33A, 400W(1ms)
4UR
XC6105F623MR
Torex Semiconductor
SOT-25
Voltage detector IC
2.3V±2%, Hst, +Rst PPO, -Rst ODO, Wt=1.6s, Rt=400ms
4US
XC6105F624MR
Torex Semiconductor
SOT-25
Voltage detector IC
2.4V±2%, Hst, +Rst PPO, -Rst ODO, Wt=1.6s, Rt=400ms
4UT
XC6105F625MR
Torex Semiconductor
SOT-25
Voltage detector IC
2.5V±2%, Hst, +Rst PPO, -Rst ODO, Wt=1.6s, Rt=400ms
4UU
XC6105F626MR
Torex Semiconductor
SOT-25
Voltage detector IC
2.6V±2%, Hst, +Rst PPO, -Rst ODO, Wt=1.6s, Rt=400ms
4UV
XC6105F627MR
Torex Semiconductor
SOT-25
Voltage detector IC
2.7V±2%, Hst, +Rst PPO, -Rst ODO, Wt=1.6s, Rt=400ms
4UX
XC6105F628MR
Torex Semiconductor
SOT-25
Voltage detector IC
2.8V±2%, Hst, +Rst PPO, -Rst ODO, Wt=1.6s, Rt=400ms
4UY
XC6105F629MR
Torex Semiconductor
SOT-25
Voltage detector IC
2.9V±2%, Hst, +Rst PPO, -Rst ODO, Wt=1.6s, Rt=400ms
4UZ
XC6105F630MR
Torex Semiconductor
SOT-25
Voltage detector IC
3.0V±2%, Hst, +Rst PPO, -Rst ODO, Wt=1.6s, Rt=400ms