THICK FILM
(
ANTI SURGE
)
Flat Chip Resistors
EU
RoHS
SG73G
Endured Pulse Power Flat Chip Resistors (Ultra Presicion Grade)
■Construction
c
L
c
W
⑥
⑤
t
d
②
③
④
①
Protective coating ④
Ni plating
②
Resistive film
⑤
Sn plating
③
Inner electrode
⑥
Ceramic substrate
①
Coating color：Green
No marking
■Dimensions
Type
（Inch Size Code）
1J 0603）
（
1J AT
（0603）
2A
（0805）
2A AT
（0805）
2B
（1206）
2B AT
（1206）
Dimensions（mm）
L±0.2
1.6
2.0
3.2
W
0.8±0.1
1.25±0.1
1.6±0.2
c
0.3±0.1
0.35±0.15
0.3
＋0.2
－0.1
0.45±0.25
0.4
＋0.2
－0.1
0.55±0.35
d
0.3±0.1
0.5±0.2
0.3
＋0.2
－0.1
0.6±0.2
0.4
＋0.2
－0.1
0.8±0.2
t±0.1
0.45
0.50
0.55
0.60
Weight
（g）
（1000pcs）
2.14
4.54
9.14
■Features
・
Superior to RK73 series chip resistors in pulse withstanding
voltage and high power.
−6
・
High Precision resistor with T.C.R. ±50×10 /K and
Tolerance ±0.25％.
・
Suitable for both reflow and flow solderings.
・
Products with lead free termination meet EU-RoHS
requirements. EU-RoHS regulation is not intended for Pb-glass
contained in electrode, resistor element and glass.
・
AEC-Q200 Tested.
■Applications
・
Car electronics, Power supply, Industrial equipment
■Type Designation
Example
SG73G
2A
Power
Rating
Characteristic
T
TD
1002
D
Resistance
Tolerance
C：±0.25%
D：±0.5%
■Reference Standards
IEC 60115-8
JIS C 5201-8
EIAJ RC-2134C
Product
Code
Terminal
Surface Material
T：Sn
Taping
TP:2mm pitch
punch paper
TD:4mm pitch
punch paper
TE:4mm pitch
plastic
embossed
BK:Bulk
Nominal
Resistance
4桁
1J : 0.2W
Nil：Standard
0.33W
※1
NEW
A：Heat shock
resistance
※2
2A : 0.25W
0.5W
※1
2B : 0.33W
0.5W
※1
※2 With type A, only T is available as the terminal surface material.
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
Type
1J
2A
2B
Power
Rating
0.2W
0.33W
※1
0.25W
0.5W
0.5W
※1
Rated
Ambient
Temp.
70℃
70℃
70℃
70℃
70℃
70℃
Rated
Terminal
Part Temp.
125℃
125℃
125℃
100℃
125℃
120℃
Resistance Range（Ω）
T.C.R.
（×10
−6
/K） C :±0.25％ D :±0.5％
E24・E96
E24・E96
Max.
Working
Voltage
150V
Max.
Overload
Voltage
200V
400V
400V
Packaging & Q’
ty/Reel pcs）
（
TP
10,000
10,000
—
TD
5,000
5,000
5,000
TE
—
4,000
※3
4,000
※3
±50
10½1M
10½1M
200V
200V
0.33W
※1
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.
※3 Standard packaging：TD(4mm pitch punch paper)
If any questions arise whether to use the Rated Ambient Temperature” the Rated Terminal Part Temperature” your usage conditions, please give priority to the Rated Terminal Part Temperature”
“
or “
in
“
.
For more details, please refer to Introduction of the derating curves based on the terminal part temperature” the beginning of our catalog.
“
on
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.
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.
Jun.
2021
Oct.
2021
www.koaglobal.com
■Derating Curve
Ambient temperature
100
Flat Chip Resistors
Flat Chip Resistors
Terminal part temperature
100
Terminal part temperature
100
Percent rated power（％）
Percent rated power（％）
Percent rated power（％）
80
60
40
20
0
-60 -40
-55
80
60
40
20
0
-60 -40
-55
1J/0.2W
2A/0.25W
2B/0.33W
80
60
40
20
0
-60 -40
-55
2A/0.5W
（100℃）
2B/0.5W
（120℃）
1J/0.33W
（125℃）
-20
0
60 80 100 120 140 160
70
155
Ambient temperature
（℃）
20
40
-20
80 100 120 140 160
125 155
あ1
Terminal part temperature
（℃）
0
20
40
60
-20
80 100 120 140 160
125 155
Terminal part temperature
（℃）
あ1
0
20
40
60
For resistors operated at an ambient temperature of 70℃ or higher,
the power shall be derated in accordance with the above derating
curve.
When the terminal part temperature of the resistor exceeds the rated terminal part temperature shown above, the power shall be
あ1
あ1
derated according to the derating curve.
If you want to use at the rated power of ※1, please use the derating curves based on the terminal part temperature of right side.
※Please refer to“Introduction of the derating curves based on the terminal part temperature”on the beginning of our catalog
before use.
■Temperature Rise
SG73G 1J
120
200
1J
0.33W）
（
①
1J
0.33W）
（
②
100
180
160
SG73G 2A-2B
2B
（0.5W）
①
2A
（0.5W）
①
2B
（0.5W）
②
Temperature Rise
（℃）
Temperature Rise
（℃）
2A
（0.5W）
②
Regarding the temperature rise, the
value of the temperature varies per
conditions and board for use since the
temperature is measured under our
measuring conditions.
80
140
120
100
80
60
40
20
Measurement condition
Room temperature: 25℃
PCB: FR-4t = 1.6mm
Cu foil thickness: 35µm
① Hot spot
：
② Terminal
：
60
40
20
0
0
0
25
Power Rating
（%）
50
75
100
0
Power Rating
（%）
25
50
75
100
■One-Pulse Limiting Electric Power
SG73G 1J-2B
One-Pulse Limiting Electric Power W）
（
1000
100
10
2B
1
2A
1J
0.1
0.001
0.01
0.1
1
10
100
1000
Pulse Duration
（ms）
The maximum applicable voltage is equal to the max. overload voltage.
Please ask us about the resistance characteristic of continuous applied pulse.
The pulse endurance values are not assured values,so be sure to check the
products on actual equipment when you use them.
■Performance
Test Items
Resistance
T.C.R.
Overload
（Short time）
Resistance to soldering heat
Rapid change of
temperature
Moisture resistance
Endurance at 70℃ or rated
terminal part temperature
High temperature exposure
Performance Requirements ΔR±
（％＋0.1Ω）
Limit
Within specified tolerance
Within specified T.C.R.
2
1
0.5：Characteristic
「Nil」
（Standard）
1
：Characteristic
「A」
（Heat shock resistance）
2
2
1
Typical
—
—
0.5
0.75
0.3：Characteristic
「Nil」
（Standard）
0.5：Characteristic
「A」
（Heat shock resistance）
0.75
0.75
0.3
Test Methods
25℃
＋25℃/－55℃ and ＋25℃/＋125℃
Rated voltage×2.5 for 5s 2A : 0.5W, Rated voltage×2 for 5s）
（
260℃±5℃, 10s±1s
Characteristic
「Nil」
(Standard)：
ー55℃
（30min.）
/＋125℃
（30min.）
100 cycles
Characteristic 「A」
(Heat shock resistance)：
ー55℃
（30min.）
/＋125℃
（30min.）
1000 cycles
40℃±2℃, 90%½95%RH, 1000h
1.5h ON/0.5h OFF cycle
70℃±2℃ or rated terminal part temperature ±2℃ 1000h
1.5h ON/0.5h OFF cycle
＋155℃, 1000h
■Precautions for Use
・
The substrate of chip resistors is alumina. Cracks may occur at the connection of solder (solder fillet portion) due to the difference of the coefficient of thermal
expansion from a mounting board when heat stress like heat cycle, etc. are repeatedly given to them. Care should be taken to the occurrence of the cracks when
the change in ambient temperature or ON/OFF of load is repeated. The occurrence of the crack by heat stress may be influenced by the size of a pad, solder
volume, heat radiation of mounting board etc., so please pay careful attention to designing when a big change in ambient temperature and conditions for use like
ON/OFF of load can be assumed.
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.
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.
Jun. 2021
Oct. 2021
www.koaglobal.com
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