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 '1Y'

Marking
Name
Manufacturer/Case
Function
1Y
BF823
Continental Device India
SOT-23
PNP transistor
Vid, 250V, 50mA, 250mW, B>50, >60MHz
1Y
CMBT3903
Continental Device India
SOT-23
NPN transistor
GP, 60V, 200mA, 250mW, B=50..150, >300MHz
1Y
KDZ11VVY
Korea Electronics
VSC
Zener diode
10.76..11.22V, Izt=5mA, Zzt=15, 100mW
1Y
KST3903
Samsung Electronics
SOT-23
PNP transistor
GP, 60V, 200mA, 350mW, B=50..150, >250MHz
1Y
MM3Z7V5
Luguang Electronic Technology
SOD-323FL
Zener diode
7.0..7.9V, Izt=5mA, Zzt=30, 300mW
1Y
MMBT3903
Motorola
SOT-23
NPN transistor
GP, 60V, 200mA, 250mW, B=50..150, >300MHz
1Y
R1210N511C
Ricoh
SOT-23-5
DC/DC voltage converter IC
PWM step-up, 5.1V, 100kHz
1Y
R3117K291A
Ricoh
DFN1010-4
Voltage detector IC
2.9V±1%, -Reset ODO, Sense
1Y
R5326N023A
Ricoh
SOT-23-6
Linear voltage regulator IC
LDO, Dual out, Vout1/Vout2=4.2V/3.1V±1%, 150mA, +CE
1Y
RP112K311B
Ricoh
DFN1010-4
Linear voltage regulator IC
LDO, 3.1V±1%, 150mA, +CE
1Y
RP173K311A
Ricoh
DFN1010-4
Linear voltage regulator IC
LDO, 3.1V±1%, 150mA, -CE
1Y
STZ8075

SOD-323
Zener diode
7.0..7.9V, Izt=5mA, Zzt=20, 300mW
1Y
UNRF2A6
Panasonic
ML3
NPN transistor
Sw, 50V, 80mA, 100mW, 150MHz, R1=4k7
1Y
XC6127N51BNR
Torex Semiconductor
SSOT-24
Voltage detector IC
5.1V±0.8%, -Reset ODO, -MR, Rt=100ms
1Y
XC6217C2927R-G
Torex Semiconductor
USPN-4
Linear voltage regulator IC
LDO, 2.9V±2%, 200mA, +CE
1Y
XC6217C292NR
Torex Semiconductor
SSOT-24
Linear voltage regulator IC
LDO, 2.9V±2%, 200mA, +CE
1Y
XC6223B3819R-G
Torex Semiconductor
USPQ-4B03
Linear voltage regulator IC
LDO, 3.8V±1%, 300mA, +CE, CL
1Y
YTS3903
Toshiba
SOT-23
NPN transistor
GP, 60V, 200mA, 250mW, B=50..150, >300MHz
1Y1
STZ8047A

SOD-323
Zener diode
4.45..4.69V, Izt=5mA, Zzt=80, 300mW
1YD
L8550QLT1
Leshan Radio Company
SOT-23
PNP transistor
GP, 40V, 800mA, 225mW, B=150..300
1YP
2SD2457-P
Panasonic
SOT-89
NPN transistor
AF, 50V, 1.5A, 1W, B=60..120, 150MHz
1Yp
BF823

SOT-23
PNP transistor
Vid, 250V, 50mA, 250mW, B>50, >60MHz
1YQ
2SD2457-Q
Panasonic
SOT-89
NPN transistor
AF, 50V, 1.5A, 1W, B=80..160, 150MHz
1YR
2SD2457-R
Panasonic
SOT-89
NPN transistor
AF, 50V, 1.5A, 1W, B=120..240, 150MHz
1Yt
BF823
Philips
SOT-23
PNP transistor
Vid, 250V, 50mA, 250mW, B>50, >60MHz
1YW
BF823

SOT-23
PNP transistor
Vid, 250V, 50mA, 250mW, B>50, >60MHz