■ Features
■ Applications
■ Model Designation
■ Rating
High Power Chip Resistors
1
HOKURIKU Specifications are subject to change without notice
.
Model No. WCR32 WCR50 WCR64
Size Code
INCH 1206 2010 2512
Size Code
mm 3216 5025 6432
・Automotive electronics such as E.C.U. ,etc.
・Circuits requiring high resistance to vibration.
①Model No.
WCR32 Symbol Tolerance(%) Symbol Packaging
WCR50 F ± 1.0 B Bulk
WCR64 J ± 5.0 V Paper taping (WCR32)
(Resistance) (Marking)
０Ω → 0
4.7Ω → 4R7
1kΩ → 102
1.02kΩ → 1021
Embossed taping
(WCR50,WCR64)
E
0Ω type is no marking
③Tolerance ④Packaging
3 digit or 4digit
②Resistance
WCR32 102 J V
①Model No. ②Resistance ③Tolerance ④Packaging
・Wide terminal made higher reliability of solder joint, compared to conventional chip resistor.
・Wide terminal made possible high power handling. (Rated power, WCR50 : 1W, WCR32 : 0.5W)
・High joint strengh against heat shock.
・Resistance ranging ～1MΩ.
Rated Wattage Tolerance Resistance T.C.R. Max. Working Max. Overload
(W) (%) (Ω) (ppm/℃) Voltage (V) Voltage (V)
J: ±5% 1～1M ±200
1～91 ±200
100～9.1k ±100
10k～1M ±200
J: ±5% 1～1M ±200
1～91 ±200
100～9.1k ±100
10k～1M ±200
J: ±5% 1～1M ±200
1～91 ±200
100～9.1k ±100
10k～1M ±200
Operating Tempeature Range : -55℃～＋155℃
400WCR64 2.0 200
F: ±1%
400
WCR50 1.0 200 400
F: ±1%
F: ±1%
Model No.
WCR32 0.5 200
０Ω Type
Rated Current
(A)
WCR32, WCR50, WCR64 2.0 Max. 50mΩ
Model No. Resistance
■ Dimensions
■ Structure
■ Surface Temperature
For resistors operated in ambient temperature above70 ℃,
power rating must be derated in accordance with the
derating curve.
■ Surface Temperature
Surface temperature rise is shown in this figure.
Condition : Measured by soldering on glass
cloth base material epoxy resin (t=1.6mm).
■ Packaging
Refer "Dimension, Packaging, etc."
2
HOKURIKU Specifications are subject to change without notice
High Power Chip Resistors
L
c
d
W
t
Model No. L W c d t
WCR32 3.20±0.15 1.60±0.15 0.30±0.20 0.50±0.20 0.55
＋0.15/-0.05
WCR50 5.00±0.20 2.50±0.20 0.50±0.20 0.60±0.20 0.56±0.15
WCR64 6.30±0.20 3.20±0.20 0.50±0.20 0.90±0.20 0.56±0.15
Symbol Material List
①Ceramic Substrate
②Conductor
③Resistor
④Over coat
⑤Marking
⑥Side Electrode
①
②③④⑤ ⑥
①
②③④⑤
Symbol Material List
①Ceramic Substrate
② Conductor
③ Over coat
④Marking
⑤Side Electrode
100
0
80
60
40
20
-55℃0℃70℃155℃
Power rating (%)
Ambient Temperature(℃)
150
100
50
0100 200 30050
Power rating (%)
Surface temperature (℃)
WCR50
WCR64
WCR32
Unit : mm
0Ω Type
