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 'X4'

Marking
Name
Manufacturer/Case
Function
X4
2SK852-X4
NEC Electronics
SOT-323
FET n-type
GP, 50V, 10mA, 150mW, Idss=6..12mA, Up<1.5V
X4
2SK94-4
NEC Electronics
SOT-23
FET n-type
GP, 50V, 20mA, 150mW, Idss=4..12mA, Up<1.5V
X4
APX809-40SA
Diodes
SOT-23
Voltage detector IC
4.0V±1.5%, -Reset PPO
X4
BD46382G
Rohm
SSOP-5
Voltage detector IC
3.8V±1%, -MR, -Reset PPO, 200ms
X4
BZF10C4V3
Diodesemi Technology
SOD-123F
Zener diode
4.1..4.5V, Izt=58mA, Zzt=9, 1W
X4
BZT52B68
PanJIT Semiconductor
SOD-123
Zener diode
68V±2%, Izt=2.5mA, Zzt=200, 410mW
X4
BZT52C68-V
Vishay Semiconductor
SOD-123
Zener diode
68V±5%, Izt=2.5mA, Zzt=200, 500mW
X4
BZT52C68S
PanJIT Semiconductor
SOD-323
Zener diode
68V±5%, Izt=2.5mA, Zzt=200, 200mW
X4
BZV49-C36
Zetex
SOT-89
Zener diode
36V±5%, Izt=2mA, 1W
X4
BZX384C68-F
TAITRON Components
SOD-323F
Zener diode
64.0..72.0V, Izt=2.0mA, 200mW
X4
BZX384C68-V
Vishay Semiconductor
SOD-323
Zener diode
68V±5%, Izt=2mA, Zzt=90, 200mW
X4
BZX584C68
PanJIT Semiconductor
SOD-523
Zener diode
64..71V, Izt=2mA, Zzt=180, 200mW
X4
BZX84B68
PanJIT Semiconductor
SOT-23
Zener diode
66.64..69.36V, Zzt=200, Izt=2.5mA, 410mW
X4
BZX84C68TW
PanJIT Semiconductor
SOT-363
Zener diode
Triple, 66.64..69.36V, Zzt=200, Izt=2.5mA, 200mW
X4
BZX88-C36
Ferranti Semiconductors
SOT-23
Zener diode
36V±5%, Iz=5mA, 200mW
X4
CMDZ5224B
Central Semiconductor
SOD-323
Zener diode
2.8V±5%, 20mA, Zzt=30, 250mW
X4
ELM7554CAB
ELM Technology
SOT-89
Voltage detector IC
5.4V±2%, +Reset PPO
X4
ELM7554CBB
ELM Technology
SOT-23
Voltage detector IC
5.4V±2%, +Reset PPO
X4
ELM7554NAB
ELM Technology
SOT-89
Voltage detector IC
5.4V±2%, +Reset ODO
X4
ELM7554NBB
ELM Technology
SOT-23
Voltage detector IC
5.4V±2%, +Reset ODO
X4
EMX4
Rohm
EMT6
NPN transistor
Dual, HF, 30V, 50mA, 150mW, B=27..270, 1.5GHz
X4
IMX4
Rohm
SC-74
NPN transistor
Dual, HF, 30V, 50mA, 300mW, B=27..270, 1.5GHz
X4
IMX8
Rohm
SC-74
NPN transistor
Dual, 120V, 50mA, 300mW, B=180..820, 140MHz
X4
KA4F4N
NEC Electronics
SOT-416
NPN transistor
Sw, 60V, 100mA, 200mW, R1/R2=22k/47k
X4
MFPZ4731A
TAITRON Components
SOD-123F
Zener diode
4.1..4.5V, Izt=58.0mA, 1W
X4
MM1Z5237B
EIC Semiconductor
SOD-323FL
Zener diode
7.79..8.61V, Izt=20mA, Zzt=8, 500mW
X4
MM1Z5237BH
Zowie Technology
SOD-123
Zener diode
7.79..8.61V, Izt=20mA, Zzt=8, 500mW
X4
MMSZ22T
Motorola
SOD-123
Zener diode
22V±5%, Izt=5mA, Zzt=55, 500mW
X4
MMSZ5237B
EIC Semiconductor
SOD-123
Zener diode
8.2V±5%, Izt=20mA, Zzt=8, 500mW
X4
PZU18BA
Philips
SOD-323
Zener diode
18V±5%, If=200mA, 320mW
X4
R1163D241D
Ricoh
SON-6
Linear voltage regulator IC
LDO, 2.4V±1.5%, 150mA, +CE, CL, AE(mode)
X4
R1210N242C
Ricoh
SOT-23-5
DC/DC voltage converter IC
PWM step-up, 2.4V, 100kHz, +CE, ext. transistor
X4
R3111Q441C
Ricoh
SC-82AB
Voltage detector IC
4.4V±2%, -Reset ODO
X4
RN1132F
Toshiba
SOT-490
NPN transistor
Sw, 50V, 100mA, 100mW, R1=200k
X4
RN1132FV
Toshiba
SOT-723
NPN transistor
Sw, 50V, 100mA, 150mW, R1=200k
X4
RP103Q241D
Ricoh
SC-82AB
Linear voltage regulator IC
LDO, 2.4V±1%, 150mA, +CE, CL
X4
SP809NEK-2-9
Sipex
SOT-23
Voltage detector IC
2.9V±1.5%, -Reset ODO
X4
UMX4N
Rohm
SC-88
NPN transistor
Dual, HF, 30V, 50mA, 150mW, B=27..270, 1.5GHz
X4
XC6223G14BNR-G
Torex Semiconductor
SSOT-24
Linear voltage regulator IC
LDO, 1.45V±20mV, 300mA, +CE, PDR, ICP
X4
XC6225B29ANR-G
Torex Semiconductor
SSOT-24
Linear voltage regulator IC
LDO, 2.95V±2%, 30mA, +CE, CL
X4
ZD5229BSG
Cystech Electronics
SOD-323-S
Zener diode
4.3V±5%, 5mA, Zzt=88, 500mW
X4
ZGFM104V3-MH
Formosa Microsemi
SOD-123H
Zener diode
4.3V±10%, Zzt=9(Izt=58mA), 1W
X4
ZGFM104V3-N
Formosa Microsemi
SOD-123F
Zener diode
4.1..4.5V, Izt=58mA, Zzt=9, 1W
X4-
BAS21W

SOT-323
Diode
Sw, Fast, 250V, 250mA, 250mW, <50ns
X40
R1172N181A5
Ricoh
SOT-23-5
Linear voltage regulator IC
LDO, 1.85V±2%, 1A, -CE
X40
XC9110D401MR
Torex Semiconductor
SOT-25
DC/DC voltage converter IC
PFM step-up, 100kHz, 4.0V±2.5%, 400mA, +CE
X40C
SS6680C-40CX
Silicon Standard
SOT-89
Voltage detector IC
4.0V±2.5%, +Reset PPO
X40N
SS6680N-40CX
Silicon Standard
SOT-89
Voltage detector IC
4.0V±2.5%, +Reset ODO
X40P
SS6680P-40CX
Silicon Standard
SOT-89
Voltage detector IC
4.0V±2.5%, -Reset ODO
X41
2SK1001-41
NEC Electronics
SOT-23
FET n-type
AM-tuner, 22V, 50mA, 250mW, Idss=10..20mA, Vr<30m
X41
R1172N281A5
Ricoh
SOT-23-5
Linear voltage regulator IC
LDO, 2.85V±2%, 1A, -CE
X41
XC9110D411MR
Torex Semiconductor
SOT-25
DC/DC voltage converter IC
PFM step-up, 100kHz, 4.1V±2.5%, 400mA, +CE
X41C
SS6680C-41CX
Silicon Standard
SOT-89
Voltage detector IC
4.1V±2.5%, +Reset PPO
X41N
SS6680N-41CX
Silicon Standard
SOT-89
Voltage detector IC
4.1V±2.5%, +Reset ODO
X41P
SS6680P-41CX
Silicon Standard
SOT-89
Voltage detector IC
4.1V±2.5%, -Reset ODO
X42
2SK1001-42
NEC Electronics
SOT-23
FET n-type
AM-tuner, 22V, 50mA, 250mW, Idss=150..30mA, Vr<30m
X42
XC9110D421MR
Torex Semiconductor
SOT-25
DC/DC voltage converter IC
PFM step-up, 100kHz, 4.2V±2.5%, 400mA, +CE
X42C
SS6680C-42CX
Silicon Standard
SOT-89
Voltage detector IC
4.2V±2.5%, +Reset PPO
X42N
SS6680N-42CX
Silicon Standard
SOT-89
Voltage detector IC
4.2V±2.5%, +Reset ODO
X42P
SS6680P-42CX
Silicon Standard
SOT-89
Voltage detector IC
4.2V±2.5%, -Reset ODO
X43
2SK1001-43
NEC Electronics
SOT-23
FET n-type
AM-tuner, 22V, 50mA, 250mW, Idss=25..50mA, Vr<30m
X43
XC9110D431MR
Torex Semiconductor
SOT-25
DC/DC voltage converter IC
PFM step-up, 100kHz, 4.3V±2.5%, 400mA, +CE
X43C
SS6680C-43CX
Silicon Standard
SOT-89
Voltage detector IC
4.3V±2.5%, +Reset PPO
X43N
SS6680N-43CX
Silicon Standard
SOT-89
Voltage detector IC
4.3V±2.5%, +Reset ODO
X43P
SS6680P-43CX
Silicon Standard
SOT-89
Voltage detector IC
4.3V±2.5%, -Reset ODO
X44
XC9110D441MR
Torex Semiconductor
SOT-25
DC/DC voltage converter IC
PFM step-up, 100kHz, 4.4V±2.5%, 400mA, +CE
X44C
SS6680C-44CX
Silicon Standard
SOT-89
Voltage detector IC
4.4V±2.5%, +Reset PPO
X44N
SS6680N-44CX
Silicon Standard
SOT-89
Voltage detector IC
4.4V±2.5%, +Reset ODO
X44P
SS6680P-44CX
Silicon Standard
SOT-89
Voltage detector IC
4.4V±2.5%, -Reset ODO
X45
XC9110D451MR
Torex Semiconductor
SOT-25
DC/DC voltage converter IC
PFM step-up, 100kHz, 4.5V±2.5%, 400mA, +CE
X45C
SS6680C-45CX
Silicon Standard
SOT-89
Voltage detector IC
4.5V±2.5%, +Reset PPO
X45N
SS6680N-45CX
Silicon Standard
SOT-89
Voltage detector IC
4.5V±2.5%, +Reset ODO
X45P
SS6680P-45CX
Silicon Standard
SOT-89
Voltage detector IC
4.5V±2.5%, -Reset ODO
X46
XC9110D461MR
Torex Semiconductor
SOT-25
DC/DC voltage converter IC
PFM step-up, 100kHz, 4.6V±2.5%, 400mA, +CE
X46C
SS6680C-46CX
Silicon Standard
SOT-89
Voltage detector IC
4.6V±2.5%, +Reset PPO
X46N
SS6680N-46CX
Silicon Standard
SOT-89
Voltage detector IC
4.6V±2.5%, +Reset ODO
X46P
SS6680P-46CX
Silicon Standard
SOT-89
Voltage detector IC
4.6V±2.5%, -Reset ODO
X47
XC9110D471MR
Torex Semiconductor
SOT-25
DC/DC voltage converter IC
PFM step-up, 100kHz, 4.7V±2.5%, 400mA, +CE
X47C
SS6680C-47CX
Silicon Standard
SOT-89
Voltage detector IC
4.7V±2.5%, +Reset PPO
X47N
SS6680N-47CX
Silicon Standard
SOT-89
Voltage detector IC
4.7V±2.5%, +Reset ODO
X47P
SS6680P-47CX
Silicon Standard
SOT-89
Voltage detector IC
4.7V±2.5%, -Reset ODO
X48
R1172N081A
Ricoh
SOT-23-5
Linear voltage regulator IC
LDO, 0.8V±2%, 1A, -CE
X48
XC9110D481MR
Torex Semiconductor
SOT-25
DC/DC voltage converter IC
PFM step-up, 100kHz, 4.8V±2.5%, 400mA, +CE
X48C
SS6680C-48CX
Silicon Standard
SOT-89
Voltage detector IC
4.8V±2.5%, +Reset PPO
X48N
SS6680N-48CX
Silicon Standard
SOT-89
Voltage detector IC
4.8V±2.5%, +Reset ODO
X48P
SS6680P-48CX
Silicon Standard
SOT-89
Voltage detector IC
4.8V±2.5%, -Reset ODO
X49
R1172N091A
Ricoh
SOT-23-5
Linear voltage regulator IC
LDO, 0.9V±2%, 1A, -CE
X49
XC9110D491MR
Torex Semiconductor
SOT-25
DC/DC voltage converter IC
PFM step-up, 100kHz, 4.9V±2.5%, 400mA, +CE
X49C
SS6680C-49CX
Silicon Standard
SOT-89
Voltage detector IC
4.9V±2.5%, +Reset PPO
X49N
SS6680N-49CX
Silicon Standard
SOT-89
Voltage detector IC
4.9V±2.5%, +Reset ODO
X49P
SS6680P-49CX
Silicon Standard
SOT-89
Voltage detector IC
4.9V±2.5%, -Reset ODO
X4A
XC6118N34AGR-G
Torex Semiconductor
USP-4
Voltage detector IC
3.4V±2%, ±Reset ODO, Sense, hysteresis 5%, Cd
X4A
XC6118N34AMR-G
Torex Semiconductor
SOT-25
Voltage detector IC
3.4V±2%, ±Reset ODO, Sense, hysteresis 5%, Cd
X4B
XC6118N34BGR-G
Torex Semiconductor
USP-4
Voltage detector IC
3.4V±2%, ±Reset ODO, Sense, hysteresis <1%, Cd
X4B
XC6118N34BMR-G
Torex Semiconductor
SOT-25
Voltage detector IC
3.4V±2%, ±Reset ODO, Sense, hysteresis <1%, Cd
X4C
XC6118N34CGR-G
Torex Semiconductor
USP-4
Voltage detector IC
3.4V±2%, ±Reset ODO, Sense, hysteresis 5%
X4C
XC6118N34CMR-G
Torex Semiconductor
SOT-25
Voltage detector IC
3.4V±2%, ±Reset ODO, Sense, hysteresis 5%
X4D
XC6118N34DGR-G
Torex Semiconductor
USP-4
Voltage detector IC
3.4V±2%, ±Reset ODO, Sense, hysteresis <1%
X4D
XC6118N34DMR-G
Torex Semiconductor
SOT-25
Voltage detector IC
3.4V±2%, ±Reset ODO, Sense, hysteresis <1%
X4p
BAS21W

SOT-323
Diode
Sw, Fast, 250V, 250mA, 250mW, <50ns
X4R
S594TR
Vishay Semiconductor
SOT-143R
Monolithic microwave IC
UHF, 8V, 20mA, 160mW, Idss=50..500µA
X4t
BAS21W
NXP Malaysia
SOT-323
Diode
Sw, Fast, 250V, 250mA, 250mW, <50ns
X4W
BAS21W

SOT-323
Diode
Sw, Fast, 250V, 250mA, 250mW, <50ns