Contact us when you have control request for environmental hazardous material other than the substance specified by
EU-RoHS.
For further information on taping and forming, please refer to APPENDIX C on the back pages.
■Taping & Forming Matrix
Type
CW1H
CW2H
CW3H
※1 Applicable to 0.47Ω or over
Axial Taping
T52
○
○
※1
Radial Taping
T631
VTP
○
※1
L Forming
GT
○
○
○
L12.5A
○
L15A
○
○
○
○
○
L20A
L25A
T521
○
○
○
○
■Ratings
High Power Type Resistors
Type
CW1H
CW2H
CW3H
Power
Rating
1W
2W
3W
＋25℃
Resistance Range
（Ω）
Rated Ambient
Temperature
D：±0.5％
E24・
E96
0.47½220
0.47½750
0.47½1k
F：±1％
E24・
E96
0.1½430
0.1½2k
0.1½3k
T.C.R.
（×10
−6
/K）
±20：
R≧10Ω
±50： < 10Ω
R
Operating Temp.
Range
Max. Working
Voltage
（V）
E=
√ ￣
（P×R）
￣ ￣
Max. Overload
Voltage
（V）
E=
√￣￣￣￣
（P×R×5）
Taping & Q’ty /AMMO
（pcs）
T52
1,000
－55℃½＋275℃
1,000
－
T521
－
1,000
500
T631
－
－
500
Rated voltage＝
√￣￣￣￣￣￣￣￣￣￣￣￣
Power Rating×Resistance value.
174
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.
Oct. 2020
Oct. 2021
www.koaglobal.com
■Derating Curve
Percent rated power %）
（
100
80
60
40
20
0
−100
−50
−55
0
50
100
150
200
25
Ambient temperature
（℃）
250
300
275
For resistors operated at an ambient temperature of 25℃ or higher, the power shall be derated
in accordance with the above derating curve.
■Performance
Test Items
Resistance
T.C.R.
Short time overload
Resistance to soldering heat
Load life
Low Temperature
High Temperature
Performance Requirements
ΔR±
（％＋0.05Ω）
Limit
Within specified tolerance
Within specified T.C.R.
0.2
0.2
0.5
0.2
0.5
Typical
—
—
0.15
0.15
0.45
0.15
0.45
25℃
＋25℃/－55℃ and ＋25℃/125℃
Power rating×5, 5s
350℃±10℃, 3s±0.5s
260℃±5℃, 10s±1s
25℃, Power rating 1.5h ON/0.5h OFF
2000h
－65℃, 24h
＋275℃, 250h
Test Methods
■Precautions for Use
・
Be careful to handle these resistors because outer coatings are comparatively weak to outer shock due to flameproof special coats.Please wash them to a
minimum. No external force is given to the coating films until they are well dried because the coating films become weaker right after washing. The original
strength will be returned after they are dried, so please pay attention not to apply any external force onto the coating film of resistors for 20 minutes after
drying. Especially no PC boards shall be piled up.
・
In case of using them for an AC circuit, abnormal phenomena like oscillation etc. occasionally happen as they have an inductance or a parasitic capacitance
because of their wiring structures. Use them by taking the dispersion of constants of other components into the consideration.
High Power Type Resistors
High Power Type Resistors
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.
