EU
(
)
THICK FILM WIDE TERMINAL TYPE <ANTI SULFURATION>
RoHS
Wide Terminal Type Flat Chip Resistors (High Power/Anti Sulfuration)
WK73-RT
■Construction
L
c
c
W
⑥
⑤
t
④
①ꢀProtective coating ④ꢀNi plating
②ꢀResistive film
③ꢀInner electrode
⑤ꢀSn plating
d
⑥ꢀCeramic substrate
①
②
③
Coating color：Black
■Features
■Dimensions
・Higher power than conventional type.
Dimensions（mm）
c
Type
（Inch Size Code）
Weigh（t g）
・Anti-sulfuration flat chip resistors of wide terminal type.
・Excellent anti-sulfuration characteristic due to using high
sulfuration-proof inner top electrode material.
・Suitable for both flow and reflow solderings.
・This products meet EU-RoHS requirements.
ꢀEU-RoHS regulation is not intended for Pb-glass contained in
electrode, resistor element and glass.
（1000pcs）
L
W
d
t
＋0.1
－0.3
＋0.1
2B15（0612）
2H2（1020）
3A3（1225）
1.6－0.2
3.2
5.0
0.3±0.2
0.4±0.2
0.45±0.2
0.45±0.15
12.0
30.2
45.6
＋0.1
＋0.1
－0.2
2.5－0.2
0.6±0.1
0.75±0.15
＋0.2
3.1
6.3±0.15
－0.1
■Type Designation
ꢀExample
・AEC-Q200 Tested.
■Applications
WK73R
2B15
R
T
TD
1002
F
・Car electronics, Power supply, Industrial robot
Product
Code
WK73S
WK73R
Power
Rating
Characteristic
Terminal
Surface Material
T：Sn
Taping
Nominal
Resistance
Resistance Tolerance
2B15:1.5W※1 R：Anti
TD:4mm pitch
punch paper
TE:4mm pitch
plastic
F:4 digits
J:3 digits
F：±1%
J：±5%
2H2:2W※1
3A3:3W※1
sulfuration
embossed
BK:Bulk
Resistance Value
（Ω）
Resistance Value
3 digits
4 digits
1R00～9R76
（Ω）
1～9.1
1R0～9R1
1～9.76
Contact us when you have control request for environmental hazardous material other than the substance
specified by EU-RoHS.
For further information on taping, please refer to APPENDIX C on the back pages.
■Ratings
Resistance Range（Ω）
Taping & Q’ty/Reel
（pcs）
Power
Rating
Rated Ambient Rated Terminal
T.C.R.
Max. Working
Voltage
Max. Overload
Voltage
Type
－6
F：±1％
J：±5％
E24
Temp.
Part Temp.
（×10 /K）
E24・E96
TD
TE
±100
±150
±100
±100
±150
±100
±200
±100
±100
±200
1～9.76
0.3～0.976
10～9.76k
1～9.76
1～9.1
0.3～0.91
10～9.1k
1～9.1
WK73S2B15
WK73R2B15
WK73S2H2
1.5W※1
1.5W※1
2W※1
70℃
70℃
70℃
95℃
95℃
95℃
5,000
－
0.2～0.976
10～430k
432k～1M
1～9.76
0.2～0.91
10～430k
470k～1M
1～9.1
200V
400V
－
－
4,000
4,000
WK73R2H2
WK73S3A3
WK73R3A3
2W※1
3W※1
3W※1
70℃
70℃
70℃
95℃
95℃
95℃
10～330k
332k～1M
10～330k
360k～1M
If any questions arise whether to use the“Rated Ambient Temperature”or the“Rated Terminal Part Temperature”in your usage conditions, please give priority to the“Rated Terminal Part Temperature”.
Rated voltage＝ Power Rating×Resistance value or Max. working voltage, whichever is lower.
√‾‾‾‾‾‾‾‾‾‾‾‾
※1 If you use at the rated power, please keep the condition that the terminal of the resistor is below the rated terminal part temperature. Please refer to the derating curves based on the terminal
temperature of right side on the next page.
For more details, please refer to“Introduction of the derating curves based on the terminal part temperature”on the beginning of our catalog.
Operating Temperature Range：－55℃～＋155℃
Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.
Jun. 2021
Oct. 2023
Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.
Contact our sales representatives before you use our products for applications including automotives, medical equipment and aerospace equipment.
Contact our sales representatives before you use our products for applications including automotives, medical equipment and aerospace equipment.
Malfunction or failure of the products in such applications may cause loss of human life or serious damage.
Malfunction or failure of the products in such applications may cause loss of human life or serious damage.
www.koaglobal.com
www.koaglobal.com
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