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 'W4'

Marking
Name
Manufacturer/Case
Function
W4
AP1704GW
Diodes
SC-59
Voltage detector IC
2.25V±1.5%, +Reset PPO
W4
AP8822C-34GA
Anwell Semiconductor
SOT-23
Voltage detector IC
3.4V±2%, -Reset PPO, 200ms Rt delay, Halogen-free
W4
AP8822C-34GI
Anwell Semiconductor
SC-82
Voltage detector IC
3.4V±2%, -Reset PPO, 200ms Rt delay, Halogen-free
W4
AP8822C-34GS
Anwell Semiconductor
SC-82S
Voltage detector IC
3.4V±2%, -Reset PPO, 200ms Rt delay, Halogen-free
W4
AP8822C-34GT
Anwell Semiconductor
SC-70
Voltage detector IC
3.4V±2%, -Reset PPO, 200ms Rt delay, Halogen-free
W4
AP8822C-34PA
Anwell Semiconductor
SOT-23
Voltage detector IC
3.4V±2%, -Reset PPO, 200ms Rt delay
W4
AP8822C-34PI
Anwell Semiconductor
SC-82
Voltage detector IC
3.4V±2%, -Reset PPO, 200ms Rt delay
W4
AP8822C-34PS
Anwell Semiconductor
SC-82S
Voltage detector IC
3.4V±2%, -Reset PPO, 200ms Rt delay
W4
AP8822C-34PT
Anwell Semiconductor
SC-70
Voltage detector IC
3.4V±2%, -Reset PPO, 200ms Rt delay
W4
BD46461G
Rohm
SSOP-5
Voltage detector IC
4.6V±1%, -MR, -Reset PPO, 100ms
W4
BZT52-C3V3S
PanJIT Semiconductor
SOD-323
Zener diode
3.3V±5%, Izt=5mA, Zzt=95, 200mW
W4
BZT52B3V3
PanJIT Semiconductor
SOD-123
Zener diode
3.3V±2%, Izt=5mA, Zzt=95, 410mW
W4
BZT52C3V3
Won-Top Electronics
SOD-123
Zener diode
3.3V±5%, Izt=5mA, Zzt=95, 410mW
W4
BZT52C3V3-F
TAITRON Components
SOD-123F
Zener diode
3.1..3.5V, Izt=5mA, 410mW
W4
BZT52C3V3-V
Vishay Semiconductor
SOD-123
Zener diode
3.3V±5%, Izt=5mA, Zzt=95, 500mW
W4
BZT52C3V3WS
TAITRON Components
SOD-323F
Zener diode
3.14..3.4V, Izt=5.0mA, 200mW
W4
BZT52C3V3WT
TAITRON Components
SOD-523
Zener diode
3.14..3.47V, Izt=5mA, Zzt=95, 200mW
W4
BZT52C3V3WU
TAITRON Components
SOD-723
Zener diode
3.14..3.47V, Izt=5mA, Zzt=95, 200mW
W4
BZT52C3V6
Diodes
SOD-123
Zener diode
3.6V±5%, Izt=5mA, Zzt=90, 500mW
W4
BZT52C3V6
Diodes
SOD-123
Zener diode
3.6V±5%, Izt=5mA, Zzt=90, 500mW
W4
BZT52C3V6-G
Taiwan Semiconductor Company
SOD-123
Zener diode
3.42..3.78V, Izt=5mA, Zzt=90, 350mW
W4
BZT52C3V6S
Diodes
SOD-323
Zener diode
3.6V±5%, Izt=5mA, Zzt=90, 200mW
W4
BZT52C3V6S
Diodes
SOD-323
Zener diode
3.6V±5%, Izt=5mA, Zzt=90, 200mW
W4
BZT52C3V6T
Diodes
SOD-523
Zener diode
3.6V±5%, Izt=5mA, Zzt=90, 150mW
W4
BZV49-C2V7
Zetex
SOT-89
Zener diode
2.7V±5%, Izt=5mA, 1W
W4
BZX384C3V3-V
Vishay Semiconductor
SOD-323
Zener diode
3.3V±5%, Izt=5mA, Zzt=85, 200mW
W4
BZX584C3V3
PanJIT Semiconductor
SOD-523
Zener diode
3.1..3.5V, Izt=5mA, Zzt=95, 200mW
W4
BZX784B15
Good-Ark Electronics
SOD-723
Zener diode
14.70..15.30V, Izt=5mA, Zzt=30, 100mW
W4
BZX784C3V3
PanJIT Semiconductor
SOD-723
Zener diode
3.14..3.47V, Zzt=95, Izt=5mA, 200mW
W4
BZX84B3V3
PanJIT Semiconductor
SOT-23
Zener diode
3.23..3.37V, Zzt=95 , Izt=5mA, 410mW
W4
BZX84C2V7
Central Semiconductor
SOT-23
Zener diode
2.5..2.9V, Zzt=100, Izt=5mA, 350mW
W4
BZX84C3V3
Won-Top Electronics
SOT-23
Zener diode
3.1..3.5V, Zzt=95 , Izt=5mA, 350mW
W4
BZX84C3V3TW
PanJIT Semiconductor
SOT-363
Zener diode
Triple, 3.23..3.37V, Zzt=95, Izt=5mA, 200mW
W4
BZX84C3V3W
Won-Top Electronics
SOT-323
Zener diode
3.1..3.5V, Zzt=95 , Izt=5mA, 200mW
W4
BZX88-C2V7
Ferranti Semiconductors
SOT-23
Zener diode
2.7V±5%, Iz=5mA, 200mW
W4
CZRW55C3V6-G
Comchip Technology
SOD-123
Zener diode
3.6..3.80V, Zzt=90, Izt=5mA, 500mW
W4
EC95810C34B1N
E-CMOS
SOT-23-3L
Voltage detector IC
3.4V±2%, -Reset PPO, Td=200ms
W4
EC95810C34C1N
E-CMOS
SC-70-3L
Voltage detector IC
3.4V±2%, -Reset PPO, Td=200ms
W4
EC95810C34C7I
E-CMOS
SC-82-4L
Voltage detector IC
3.4V±2%, -Reset PPO, Td=200ms
W4
EC95810C34C7S
E-CMOS
SC-82-4L
Voltage detector IC
3.4V±2%, -Reset PPO, Td=200ms
W4
ELM7634LBB
ELM Technology
SOT-23
Voltage detector IC
3.4V±2%, -Reset PPO, 500ms
W4
ELM9734CAB
ELM Technology
SOT-89
Voltage detector IC
3.4V±2.5%, +Reset PPO
W4
ELM9734CBB
ELM Technology
SOT-23
Voltage detector IC
3.4V±2.5%, +Reset PPO
W4
FES3F
Fagor Electronica
DO-214AB
Diode
U-fast recov. rectif, 300V, 3A, <50ns
W4
FMW4
Rohm
SOT-23-5
NPN transistor
Dual, GP, 120V, 50mA, 140MHz
W4
LBZT52C3V6T1G
Leshan Radio Company
SOD-123
Zener diode
3.4..3.8V, Izt=5mA, 500mW
W4
MEZ02-3.3-D3
Matsuki Electronic Company
SOD-323
Zener diode
3.14..3.47V, Izt=5mA, Zzt=95, 200mW
W4
MM3Z3V6
Secos
SOD-323
Zener diode
3.4..3.8V, Izt=5mA, Zzt=90, 200mW
W4
R1210N341D
Ricoh
SOT-23-5
DC/DC voltage converter IC
PWM step-up, 3.4V, 180kHz
W4
R3111Q341C
Ricoh
SC-82AB
Voltage detector IC
3.4V±2%, -Reset PPO
W4
R5325N004B
Ricoh
SOT-23-6
Linear voltage regulator IC
LDO, Dual out, Vout1/Vout2=2.5V/3V±1%, 150mA, +CE, CL
W4
RP103Q241B
Ricoh
SC-82AB
Linear voltage regulator IC
LDO, 2.4V±1%, 150mA,
W4
SP809NEK-2-6
Sipex
SOT-23
Voltage detector IC
2.6V±1.5%, -Reset ODO
W4
TZTC3V3WS
TAITRON Components
SOT-323
Zener diode
3.14..3.47V, Izt=5mA, Zzt=95 , 200mW
W4-
BAP50-05W
Philips
SOT-323
PIN diode
Dual, RF, 50V, 50mA, 500mW, 0.3pF, 3 (10mA/100MHz)
W4-
RT9198-26PBR
Richtek Technology
SOT-23-5
Linear voltage regulator IC
LDO, 2.6V±1%, 300mA, +CE
W40
KIC73B40M2
Korea Electronics
TSM
Voltage detector IC
4.0V±1%, -Reset PPO, Td=50ms
W40
KIC73B40T2
Korea Electronics
SOT-23
Voltage detector IC
4.0V±1%, -Reset PPO, Td=50ms
W40
R1163N401D
Ricoh
SOT-23-5
Linear voltage regulator IC
LDO, 4.0V±1.5%, 150mA, +CE, CL, AE(Mode)
W40
TK11140M
Toko America
SOT-23L-6
Linear voltage regulator IC
LDO, 4.0V±1.5%, 200mA, -CE
W40
TK11140S
Toko America
SOT-23-5
Linear voltage regulator IC
LDO, 4.0V±1.5%, 200mA, -CE
W41
KIC73B41M2
Korea Electronics
TSM
Voltage detector IC
4.1V±1%, -Reset PPO, Td=50ms
W41
KIC73B41T2
Korea Electronics
SOT-23
Voltage detector IC
4.1V±1%, -Reset PPO, Td=50ms
W41
PDTC144TT
NXP Semiconductors
SOT-23
NPN transistor
Sw, 50V, 100mA, 250mW, R1=47k
W41
PDTC144TU
NXP Semiconductors
SOT-323
NPN transistor
Sw, 50V, 100mA, 200mW, R1=47k
W41
R1163N181D5
Ricoh
SOT-23-5
Linear voltage regulator IC
LDO, 1.85V±1.5%, 150mA, +CE, CL, AE(Mode)
W41
TK11141M
Toko America
SOT-23L-6
Linear voltage regulator IC
LDO, 4.1V±1.5%, 200mA, -CE
W41
TK11141S
Toko America
SOT-23-5
Linear voltage regulator IC
LDO, 4.1V±1.5%, 200mA, -CE
W42
KIC73B42M2
Korea Electronics
TSM
Voltage detector IC
4.2V±1%, -Reset PPO, Td=50ms
W42
KIC73B42T2
Korea Electronics
SOT-23
Voltage detector IC
4.2V±1%, -Reset PPO, Td=50ms
W42
PDTA123EU
NXP Semiconductors
SOT-323
PNP transistor
Sw, 50V, 100mA, 200mW, R1/R2=2.2k/2.2k
W42
PDTA143TT
NXP Semiconductors
SOT-23
PNP transistor
Sw, 50V, 100mA, 250mW, R1=4.7k
W42
R1163N281D5
Ricoh
SOT-23-5
Linear voltage regulator IC
LDO, 2.85V±1.5%, 150mA, +CE, CL, AE(Mode)
W42
TK11142M
Toko America
SOT-23L-6
Linear voltage regulator IC
LDO, 4.2V±1.5%, 200mA, -CE
W42
TK11142S
Toko America
SOT-23-5
Linear voltage regulator IC
LDO, 4.2V±1.5%, 200mA, -CE
W43
KIC73B43M2
Korea Electronics
TSM
Voltage detector IC
4.3V±1%, -Reset PPO, Td=50ms
W43
KIC73B43T2
Korea Electronics
SOT-23
Voltage detector IC
4.3V±1%, -Reset PPO, Td=50ms
W43
PDTA123JU
NXP Semiconductors
SOT-323
PNP transistor
Sw, 50V, 100mA, 200mW, R1/R2=2.2k/47k
W43
PDTA144WT
NXP Semiconductors
SOT-23
PNP transistor
Sw, 50V, 100mA, 250mW, R1/R2=47k/22k
W43
SMTPB270
SGS-Thomson Microelectronics
DO-214AB
Transient voltage supressor
Vrwm=270V, 100A, 5W(1ms), Bidirectional
W43
TK11143M
Toko America
SOT-23L-6
Linear voltage regulator IC
LDO, 4.3V±1.5%, 200mA, -CE
W43
TK11143S
Toko America
SOT-23-5
Linear voltage regulator IC
LDO, 4.3V±1.5%, 200mA, -CE
W44
KIC73B44M2
Korea Electronics
TSM
Voltage detector IC
4.4V±1%, -Reset PPO, Td=50ms
W44
KIC73B44T2
Korea Electronics
SOT-23
Voltage detector IC
4.4V±1%, -Reset PPO, Td=50ms
W44
PDTC115ET
NXP Semiconductors
SOT-23
NPN transistor
Sw, 50V, 100mA, 250mW, R1/R2=100k/100k
W44
TK11144M
Toko America
SOT-23L-6
Linear voltage regulator IC
LDO, 4.4V±1.5%, 200mA, -CE
W44
TK11144S
Toko America
SOT-23-5
Linear voltage regulator IC
LDO, 4.4V±1.5%, 200mA, -CE
W45
KIC73B45M2
Korea Electronics
TSM
Voltage detector IC
4.5V±1%, -Reset PPO, Td=50ms
W45
KIC73B45T2
Korea Electronics
SOT-23
Voltage detector IC
4.5V±1%, -Reset PPO, Td=50ms
W45
PDTA143TU
NXP Semiconductors
SOT-323
PNP transistor
Sw, 50V, 100mA, 200mW, R1=4.7k
W45
PDTC124TT
NXP Semiconductors
SOT-23
NPN transistor
Sw, 50V, 100mA, 250mW, R1=22k
W45
TK11145M
Toko America
SOT-23L-6
Linear voltage regulator IC
LDO, 4.5V±1.5%, 200mA, -CE
W45
TK11145S
Toko America
SOT-23-5
Linear voltage regulator IC
LDO, 4.5V±1.5%, 200mA, -CE
W46
KIC73B46M2
Korea Electronics
TSM
Voltage detector IC
4.6V±1%, -Reset PPO, Td=50ms
W46
KIC73B46T2
Korea Electronics
SOT-23
Voltage detector IC
4.6V±1%, -Reset PPO, Td=50ms
W46
PDTA143XU
NXP Semiconductors
SOT-323
PNP transistor
Sw, 50V, 100mA, 200mW, R1/R2=4.7k/10k
W46
PDTC124XT
NXP Semiconductors
SOT-23
NPN transistor
Sw, 50V, 100mA, 250mW, R1/R2=22k/47k
W46
TK11146M
Toko America
SOT-23L-6
Linear voltage regulator IC
LDO, 4.6V±1.5%, 200mA, -CE
W46
TK11146S
Toko America
SOT-23-5
Linear voltage regulator IC
LDO, 4.6V±1.5%, 200mA, -CE
W47
KIC73B47M2
Korea Electronics
TSM
Voltage detector IC
4.7V±1%, -Reset PPO, Td=50ms
W47
KIC73B47T2
Korea Electronics
SOT-23
Voltage detector IC
4.7V±1%, -Reset PPO, Td=50ms
W47
PDTA124XT
NXP Semiconductors
SOT-23
PNP transistor
Sw, 50V, 100mA, 250mW, R1/R2=22k/47k
W47
PDTA143ZU
NXP Semiconductors
SOT-323
PNP transistor
Sw, 50V, 100mA, 200mW, R1/R2=4.7k/47k
W47
TK11147M
Toko America
SOT-23L-6
Linear voltage regulator IC
LDO, 4.7V±1.5%, 200mA, -CE
W47
TK11147S
Toko America
SOT-23-5
Linear voltage regulator IC
LDO, 4.7V±1.5%, 200mA, -CE
W48
KIC73B48M2
Korea Electronics
TSM
Voltage detector IC
4.8V±1%, -Reset PPO, Td=50ms
W48
KIC73B48T2
Korea Electronics
SOT-23
Voltage detector IC
4.8V±1%, -Reset PPO, Td=50ms
W48
PDTC123EU
NXP Semiconductors
SOT-323
NPN transistor
Sw, 50V, 100mA, 200mW, R1/R2=2.2k/2.2k
W48
PDTC123JU
NXP Semiconductors
SOT-323
NPN transistor
Sw, 50V, 100mA, 200mW, R1/R2=2.2k/47k
W48
TK11148M
Toko America
SOT-23L-6
Linear voltage regulator IC
LDO, 4.8V±1.5%, 200mA, -CE
W48
TK11148S
Toko America
SOT-23-5
Linear voltage regulator IC
LDO, 4.8V±1.5%, 200mA, -CE
W49
KIC73B49M2
Korea Electronics
TSM
Voltage detector IC
4.9V±1%, -Reset PPO, Td=50ms
W49
KIC73B49T2
Korea Electronics
SOT-23
Voltage detector IC
4.9V±1%, -Reset PPO, Td=50ms
W49
TK11149M
Toko America
SOT-23L-6
Linear voltage regulator IC
LDO, 4.9V±1.5%, 200mA, -CE
W49
TK11149S
Toko America
SOT-23-5
Linear voltage regulator IC
LDO, 4.9V±1.5%, 200mA, -CE
W4C
KIC73B438M2
Korea Electronics
TSM
Voltage detector IC
4.38V±1%, -Reset PPO, Td=50ms
W4C
KIC73B438T2
Korea Electronics
SOT-23
Voltage detector IC
4.38V±1%, -Reset PPO, Td=50ms
W4F
KIC73B463M2
Korea Electronics
TSM
Voltage detector IC
4.63V±1%, -Reset PPO, Td=50ms
W4F
KIC73B463T2
Korea Electronics
SOT-23
Voltage detector IC
4.63V±1%, -Reset PPO, Td=50ms
W4F
PMBD353
Philips
SOT-23
Diode
Dual, SBR, 4V, 30mA, Vf<600mV(10mA), <1pF
W4W
BAP50-05W
Philips
SOT-323
PIN diode
Dual, RF, 50V, 50mA, 500mW, 0.3pF, 3 (10mA/100MHz)
W4W
CMSZDA2V7
Central Semiconductor
SOT-323
Zener diode
Dual, 2.5..2.9V, Zzt=100, 57mA, 275mW