Approval sheet
SOLDERING CONDITIONS
The robust construction of chip resistors allows them to be completely immersed in a solder bath of 260C for 10
seconds. Therefore, it is possible to mount Surface Mount Resistors on one side of a PCB and other discrete
components on the reverse (mixed PCBs).
Surface Mount Resistors are tested for solderability at 235C during 2 seconds within lead-free solder bath.
The test condition for no leaching is 260C for 30 seconds. Typical examples of soldering processes that
provide reliable joints without any damage are given in Fig
3
Fig 3. Infrared soldering profile for Chip Resistors WW25Q
CATALOGUE NUMBERS
The resistors have a catalogue number starting with .
L
WW25
Q
Type code
Q : 1W
R005
J
T
Size code
Resistance code
Tolerance
J : 5%
F : 1%
Packaging code
Termination code
WW25 : 2512
R is first digit followed by 3
significant digits.
T : 7” reeled in tape
L
= Sn base
(lead free)
0.010
0.005
=
=
R010
R005
Reeled tape packaging
: 12mm width embossed taping 4,000pcs per reel.
Page 5 of 10
ASC_WW25Q_V07
Nov - 2023