Approval
sheet
SOLDERING CONDITION
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. 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
CATALOGUE NUMBERS
The resistors have a catalogue number starting with.
WW25
P
R100
J
T
L
V
Size code
Type code
Resistance code
Tolerance
J : 5%
F : 1%
Packaging code
T : 7” Reel taping
G : 13” Reel taping
Termination
code
Special code
V =
WW25 : 2512
WW20 : 2010
WW10 : 1210
WW12 : 1206
WW08 : 0805
WW06 : 0603
WW04 : 0402
P :Power
E96 +E24:
L
= Sn base
2512 size = 2W
2010 size = 1W
1206 size = 1/2W
1210 size = 1/2W
0805 size = 1/4W
0603 szie = 1/8W
0402 size = 1/8W
“R” is first digit followed by
3 significant digits.
1. AEC Q200
Compliant
(lead free)
e.g.:
2. Anti-Sulfuration
ASTM B-809-95
compliant 60’C x
480hrs
0.1ohm
=
=
R100
R560
0.56ohm
3. 100% CCD visual
inspection
Tape packaging WW12, WW10, WW08, WW06 : 8mm width paper taping 5,000pcs per reel.
WW04: 8mm width paper taping 10,000pcs per reel.
WW25, WW20: 12mm width plastic taping 4,000pcs per reel.
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ASC_WWxxP_V AUTO_V01
Sep - 2023