EU
(
)
THICK FILM WIDE TERMINAL TYPE
RoHS
Wide Terminal Type Flat Chip Resistors
WK73R
■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
■Dimensions
■Features
Dimensions（mm）
c
・Flat chip resistors of wide terminal type.
・High reliability and performance with T.C.R.±100×10－6/K,
resistance tolerance ±0.5%.
Type
Inch Size Code
Weigh（t g）
（1000pcs）
（
）
L
W
d
t
1E（0204） 0.5±0.05 1.0±0.05 0.15±0.05 0.15±0.05 0.35±0.05
0.65
2.13
4.93
12.0
30.2
45.6
1J（0306）
2A（0508） 1.25±0.15 2.0±0.15
2B（0612） 1.6±0.15 3.2±0.2
2H（1020） 2.5±0.15 5.0±0.15
0.8±0.1
1.6±0.1
0.15±0.1
0.3±0.2
0.3±0.2 0.45±0.15
0.2±0.1
0.35±0.2 0.55±0.1
0.45±0.1
・Suitable for both reflow and flow solderings.
・Products meet EU-RoHS requirements.
ꢀEU-RoHS regulation is not intended for Pb-glass contained in
electrode, resistor element and glass.
・AEC-Q200 Tested.
0.4±0.2
0.6±0.1
0.75±0.15
3A（1225） 3.1±0.15 6.3±0.15 0.45±0.2
■Applications
・Power supply, ECU etc.
■Type Designation
ꢀExample
■Reference Standards
ꢀIEC 60115-8
2B
T
TD
1002
F
WK73R
ꢀJIS C 5201-8
ꢀEIAJ RC-2134C
Product
Code
Power
Rating
Terminal
Taping
Nominal
Resistance
Tolerance
Surface Material
Resistance
※1
1E:0.33W
T：Sn
TP:2mm pitch
punch paper
TD:4mm pitch
punch paper
TE:4mm pitch
plastic
D,F:4 digits
J:3 digits
D:±0.5%
F:±1%
J:±5%
※1
1J:0.5W
※1
2A:0.75W
※1
1W
2B:0.75W
※1
1W
2H:1W
embossed
BK:Bulk
3A:1.5W
※1
2W
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
D：±0 . 5％
F：±1％
E24・E96
J：±5％
－6
Temp.
Part Temp.
（×10 /K）
E24・E96
E24
TP
TD
TE
WK73R1E
WK73R1J
0.33W※1
0.5W※1
0.75W※1
1W※1
70℃
70℃
70℃
70℃
70℃
70℃
125℃
125℃
125℃
125℃
125℃
115℃
±100
±100
±100
±100
±100
±100
±100
±200
±100
±200
±100
±200
－
10～1M
10～1M
10～1M
10～1M
75V
100V
200V
10,000
－
－
－
150V
－
5,000
－
－
20.5k～1M
10～20k
22k～1M
10～20k
WK73R2A
WK73R2B
WK73R2H
－
5,000
－
－
0.75W
1W※1
10～1M
10～1M
10～1M
－
－
5,000
－
－
10～9.76k
10～9.76k
10～430k
432k～1M
10～330k
332k～1M
10～330k
332k～1M
10～9.1k
10～430k
470k～1M
10～330k
360k～1M
10～330k
360k～1M
－
－
－
－
－
－
1W
70℃
70℃
70℃
125℃
125℃
115℃
200V
400V
4,000
1.5W
2W※1
WK73R3A
－
－
4,000
Operating Temperature Range：－55℃～＋155℃
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.
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”.
For more details, please refer to“Introduction of the derating curves based on the terminal part temperature”on the beginning of our catalog.
Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.
Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.
Mar. 2023
Oct. 2023
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.
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www.koaglobal.com
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