CHIP RESISTORS
1005(0402) / 1608(0603) / 2012(0805) Series
Features
1.
2.
3.
4.
Small size and light weight
High reliability and stability
Suitable for both reflow soldering and wave soldering
Low noise
Applications
Any
general
circuit of portable equipment which compact size and
high mounting densities are required.
Ordering Information
CODE : WR04 X 103 J T
(1) (2) (3) (4) (5)
(1) Size Code
WR08 : 2012(0805)
WR06 : 1608(0603)
WR04 : 1005(0402)
(2) Tape Code
X : Normal
Y : Special order
(3) Resistance Code
E24 : Two significant digits
followed by no.of zeros
4.7Ω=4R7
10Ω=100
220Ω=221
Jump=000
E96 : Two significant digits
followed by no.of zeros
102Ω=1020
37.4kΩ=3742
WR04 : No marking
(4) Tolerance
F = ±1%
G= ±2%
J = ±5%
P = Jumper
(5) Packaging Code
No Code=Bulk
T=Reel
Shape and Dimensions
unit:mm
Size
WR08
WR06
WR04
L
2.0±0.1
1.6±0.1
1.0±0.05
W
1.25±0.1
0.8±0.1
0.5±0.05
A
0.4±0.2
0.3±0.1
0.2±0.1
B
0.4±0.2
0.3±0.2
0.25±0.1
T
0.5±0.15
0.45±0.15
0.35±0.05
Power Derating
Ratings
Series No
Power rating
℃
at 70℃
1/8W
1/10W
1/16W
TCR
℃
(ppm/℃)
±100
±200
±100
±200
±200
±200
Max RCWV
(Note1)
100V
100V
50V
50V
50V
50V
Max Overload
Voltage
200V
200V
100V
100V
100V
100V
Resistance
±
Tolerance(±%)
1
5
1
5
1
2,5
Resistance
Range(Note2)
10Ω ~ 1MΩ
1Ω ~ 10MΩ
10Ω ~ 1MΩ
1Ω ~ 10MΩ
6.8Ω ~2.2MΩ
6.8Ω ~ 2.2MΩ
Standard
Res. Values
E-96
E-24
E-96
E-24
E-96
E-24
Working
Temperature
℃
Range(℃)
WR08
WR06
WR04
-55 ~ 125℃
57
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Note1. RCWV (Rated Continuous Working Voltage) is determined by
RCWV = (Rated power x Resistance Value), or Max. RCWV listed above, whichever is lower.
Note2. Resistance value other than specified range is also available.
Note3. E-96 is only available for 1% tolerance.
Ⅳ
Tests and Specifications
Test Item
DC Resistance
Specification
Chip Resistor
With the specified tolerance
Jumper
50mΩ
lower
Test Method
JIS C 5202 5.1
DC Resistance values measured at the test voltages specified below :
Resistance nominal
Test voltage
100Ω
0.3V
1kΩ
1V
10kΩ
3V
100kΩ
10V
1MΩ
25V
10MΩ
50V
JIS C 5202 5.2 / IEC 115-1 4.8.4.2
Natural resistance change per temperature degree centigrade
TCR(ppm/℃)
=
R
2
-
R
1
X10
6
R
1
(t
2
-
t
1
)
R
1
: Resistance value at referance temperature
R
2
:
Resistance value at test temperature
t
1
: Room temperature, t
2
: Test temperature
JIS C 5202 5.5 / IEC 115-1 4.13
Permanent resistance change after a 5 second application of a
voltage 2.5 times RCWV or the maximum overload voltage specified
in the above list, whichever is less.
JIS C 5202 6.4 / IEC 115-1 4.18
With 260℃±5℃ for 10±1 second.
JIS C 5202 6.5 / IEC 115-1 4.17
After immersing flux, dip in the 235℃±5℃molten solder bath for
2±0.5 second.
JIS C 5202 7.4 / IEC 115-1 4.19
Resistance change after continuous 5cycle for duty cycle are specified
below :
Step
Temperature
Time
1
-55℃±3℃
30min
2
Normal
2~3min
3
+125℃±3℃
30min
4
Normal
2~3min
JIS C 5202 7.9 / IEC 115-1 4.24.2
Resistance change after 1000+48/-0 hours, 1.5 hours
^ON_
0.5hour
^OFF_
,
,
at RCWV in a humidity chamber controlled at 40℃±2℃ and 90%~95% relative humidity
Temperature
Coefficient of
Resistance
(TCR)
WR08
WR06
WR04
±100ppm/℃
for F product,
±200ppm/℃
for J product.
-300~+500ppm/℃ for R 10Ω
0 ~ 500ppm/℃ for R 10Ω
±200ppm/℃
for R 10Ω
±(2%+0.1Ω)
-
Short Time
Overload
(STOL)
Resistance to
Solder Heat
Solderability
50mΩ
lower
±(1%+0.05Ω)
95% coverage min
50mΩ
lower
-
Temperature
Cycle
WR08
WR06
WR04
±(1%+0.1Ω)
±(2%+0.1Ω)
50mΩ
lower
Load Life in
Humidity
WR08
WR06
WR04
(1%)
WR04
(2%, 5%)
±(3%+0.1Ω)
for 10Ω R 1MΩ
±(5%+0.1Ω)
for R 10Ω
R 1MΩ
±(2%+0.1Ω)
±(3%+0.1Ω)
±(3%+0.1Ω)
for 10Ω R 1MΩ
±(5%+0.1Ω)
for R 10Ω
R 1MΩ
±(2%+0.1Ω)
±(3%+0.1Ω)
50mΩ
lower
Load Life
WR08
WR06
WR04
(1%)
WR04
(2%, 5%)
50mΩ
lower
JIS C 5202 7.10 / IEC 115-1 4.25.1
Permanent resistance change after 1000+48/-0 hours, operating at RCWV with
duty cycle of 1.5 hours
^ON_
0.5hour
^OFF_
at 70℃±2℃ ambient.
,
,
Terminal
Strength
±(1%+0.05Ω)
no evidence of mechanical demage
50mΩ
lower
JIS C 5202 6.1.4 / IEC 115-1 4.33
Bending test : at Y/X = 3mm/90mm, one time, 10 seconds.
Pulling test : 500 grams.
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CHIP RESISTORS
Packaging & Reel Dimension
Reel Dimension(mm)
A
WR08
WR06
WR04
1.65±0.2
1.1±0.2
0.7±0.05
B
2.4±0.2
1.9±0.2
1.2±0.05
F
4.0±0.1
4.0±0.1
2.0±0.1
T
1.0MAX
1.0MAX
0.4±0.05
Size
WR06,08
WR04
Tape
Material
paper
paper
Tape
Width
8mm
8mm
Pcs/Reel
5,000
10,000
59
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