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 '4W'

Marking
Name
Manufacturer/Case
Function
4W
BCW67AR
Zetex
SOT-23
PNP transistor
AF, Sw, 45V, 800mA, 330mW, B=100..250, >100MHz
4W
MM3Z75V
Secos
SOD-323
Zener diode
70..79V, Izt=2mA, Zzt=255, 200mW
4W
R1210N341C
Ricoh
SOT-23-5
DC/DC voltage converter IC
PWM step-up, 3.4V, 100kHz
4W
RP101K221D
Ricoh
DFN1612-4
Linear voltage regulator IC
LDO, LN, 2.2V±0.8%, 300mA, +CE, CL
4W
RP173K531B
Ricoh
DFN1010-4
Linear voltage regulator IC
LDO, 5.3V±1%, 150mA, +CE
4W
RQ5RW49CA
Ricoh
SC-82AB
Linear voltage regulator IC
LDO, 4.9V±2%, 150mA
4W-
BAP64-04W
Philips
SOT-323
PIN diode
Dual, RF, 100V, 100mA, 250mW, 0.35pF, 3.8(10mA/100MHz)
4W1
STZ8220C

SOD-323
Zener diode
22.1..23.24V, Izt=5mA, Zzt=8, 300mW