Wide Terminal Type High Wattage Chip Resistor

Wide Terminal Type High Wattage Chip Resistoｒ
Hokuriku Electric Industry Co.,Ltd
[Model No.]
WCR110/160
[Features]
■Surface mount type, 3W , 5W rated of high wattage type
■Primary circuit of power supply is suitable application.
■Due to wide side terminal structure, solder joints hold high reliability.
■Wide side terminal structure has effect of suppressing heat generation.
■1Ω～1MΩ, wide resistance range is covered.
■Europe RoHS compliant product.
[Dimensions]
（Unit:ｍｍ）
Ｌ
Ｗ
Model No.
L
W
t
c
d
WCR110
11.00±0.20
5.00±0.20
0.56±0.15
0.60±0.20
1.50±0.20
WCR160
16.00±0.20
8.00±0.20
0.56±0.15
0.70±0.20
2.50±0.20
Rated power (W)
Tolerance
Range (Ω)
TCR（ppm/℃）
c
ｔ
d
[Specification]
Model No.
WCR110
3.0 W
WCR160
5.0 W
Max. Working voltage Max. Overload voltage
1～91
±200
200V
F（±1%）
100～9.1k
±100
10k～1M
±200
250V
J（±5%）
1～1M
±200
*Specification in bold line is common to WCR110, WCR160.
*Operating temperature range : -55～+155℃
[Structure]
No.
1
2
3
4
5
6
7
8
9
10
Element Name
Ceramic substrate
Back electrode
Top electrode
Resistive element
Protective coat Ⅰ
Protective coat Ⅱ
Marking
Side electrode
Ni plating
Sn plating
3
7
4
6
8
9
1
10
2
* Design・specification are subject to change without prior notice. Please check before purchase and use.
2015.4.10
5
HOKURIKU
400V
500V
Hokuriku Electric Industry Co.,Ltd
[Power rating]
■For resistors operated in ambient temperature above 70 ℃,power rating must be derated in
accordance with the derating curve.
Derating Curve
100
Power rating (%)
80
60
40
20
0
-55
0
70
155
Ambient temperature (℃)
【Surface temperature】
■Please refer below, for relation between rated power ratio and surface temperature rise.
Condition：
Condition： Measure by soldering to glassglass-fabric laminate epoxy resin (t=
(t=1.6
t=1.6mm
1.6mm Cu foil 35μm
35μm)
μm)
WCR160
Temperature rise
WCR110
5W (Center of resistor)
3W (Center of resistor)
1W (Center of resistor)
180
160
S urface tem p erature rise（℃）
Surface tem p erature rise（℃）
Temperature rise
200
200
Hollow dot:
(Electrode of resistor)
140
120
100
80
60
40
20
3W
1W
180
160
(Center of resistor)
(Center of resistor)
Hollow dot:
(Electrode of resistor)
140
120
100
80
60
40
20
0
10
20
Cu foil
d=e
0
30
10
Unit (mm)
20
d=e
Cu foil
30
Unit (mm)
e
※ Please keep center temperature of the resistor not to exceed 155℃.
d
[Recommended footprint]
b
c
WCR110
WCR160
a
2.5
3.5
b
2.0
3.2
c
11.0
16.0
b a
(mm)
a
c
* Design・specification are subject to change without prior notice. Please check before purchase and use.
2015.4.10
HOKURIKU
Cu foil pattern dimension for measurement