High Power Low Resistance Chip Resistors
Model No.
Size Code
INCH
Size Code
mm
WLCR32
1206
3216
WLCR50
2010
5025
WLCR64
2512
6432
■
Features
・High
power type, milliohm resistor product. Low resistance range covers from 10mΩ.
・Wide
terminal made higher reliability of solder joint, compared to conventional chip resistor.
・Wide
terminal made possible high power handling. (Rated
power, WLCR64: 2W, WLCR50: 1W, WLCR32: 0.5W)
・High
joint-strength against
heat shock.
■
Applications
・Automotive
electronics such as E.C.U., etc.
・Circuits
requiring high resistance to vibration
・For
current detection
■
Model Designation
WLCR32
①Model
No.
①Model
No.
WLCR32
WLCR50
WLCR64
R10
②Resistance
②Resistance
3 or 4 digit
(Less than 100mΩ: all 4 digit
J
③Tolerance
③Tolerance
Symbol Tolerance(%)
F
± 1.0
J
± 5.0
Symbol
B
V
E
V
④Packaging
④Pckging
Packaging
Bulk
Paper taping (WLCR32)
Embossed taping
(WLCR50,WLCR64)
(Example)
10mΩ
470mΩ
102mΩ
→
→
→
R010
R47
R102
■
Rating
Model No.
Rated Wattage
(W)
0.5
Tolerance
(%)
J: ±5%
F: ±1%
WLCR50
1.0
J: ±5%
F: ±1%
WLCR64
2.0
J: ±5%
F: ±1%
Resistance
(mΩ)
10
½
33
36
½
91
100
½
910
100
½
976
10
½
33
36
½
91
100
½
910
100
½
976
10
½
33
36
½
91
100
½
910
100
½
976
T.C.R.
(ppm/
℃
)
±500
±350
±200
±200
±500
±350
±200
±200
±500
±350
±200
±200
Max. Working
Voltage (V)
200
Max. Overload
Voltage (V)
400
WLCR32
200
400
200
400
Operating Temperature Range : -55
℃½＋
155
℃
HOKURIKU
Specifications are subject to change without notice
.
1
High Power Low Resistance Chip Resistors
■
Dimensions
L
c
W
t
d
Unit : mm
Model No.
WLCR32
WLCR50
WLCR64
L
3.20±0.15
5.00±0.20
6.30±0.20
W
1.60±0.15
2.50±0.20
3.20±0.20
c
0.30±0.20
0.50±0.20
0.50±0.20
d
0.50±0.20
0.60±0.20
0.90±0.20
t
0.55
＋0.15/-0.05
0.56±0.15
0.56±0.15
■
Structure
③ ④ ⑤
②
⑥
Symbol
①
②
③
④
⑤
⑥
①
Material List
Ceramic Substrate
Conductor
Resistor
Over coat
Marking
Side Electrode
Power rating (%)
■
Surface Temperature
For resistors operated in ambient temperature above70
℃,
power rating must be derated in accordance with the
100
80
60
40
20
0
-55℃
0℃
70℃
155℃
derating curve.
Ambient Temperature(℃)
■
Surface Temperature
Surface temperature rise is shown in this figure.
150
WLCR64
WLCR50
WLCR32
Surface temperature (℃)
100
Condition : Measured by soldering on glass
cloth base material epoxy resin (t=1.6mm).
50
0
50
100
200
300
Power rating (%)
■
Packaging
Refer "Dimension, Packaging, etc."
HOKURIKU
Specifications are subject to change without notice
2
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