RESISTANCE TO POWER SURGE
EU
RoHS
PCF
Ceramic Resistors for Anti Pulse・Surge
■Construction
C
⑤
⑥
①
②
③
④
ℓ
L
① Resistive body
② Inner electrode
③ Electrode cap
④ Lead wire
⑤ Coating
⑥ Marking
ℓ
φd
D
Coating color：Light green
Marking：Color code
■Features
・
KOA original bulk ceramic resistors.
・
Excellent in anti-pulse characteristics.
・
Higher reliability against disconnection compared to wirewound
resistors and film resistors.
・
Products meet EU-RoHS requirements.
・
Flame retardant coating. (Equivalent to UL-94 V-0)
・
Non-lnductive resistors.
・
AEC-Q200 Tested.
■Dimensions
Type
PCF1/2
PCF1
PCF2
Dimensions（mm）
L±1
9.0
16.5
19.0
C max.
11.1
19.0
22.5
D
3.5±0.5
5.5±1.0
7.0±1.0
d Nominal）
（
0.7
0.8
ℓ
※1
±3
30.0
38.0
Weight
（g）
（1000pcs）
450
1340
2240
※1 Lead length changes depending on taping type.
■Applications
・
High voltage circuits for X-ray generators and electron
microscopes.
・
Power supply circuits for machine tools, etc.
■Type Designation
Example
PCF
Product
Code
PCF
1
Power
Rating
1/2:0.5W
1:1.0W
2:2.0W
C
Terminal
Surface Material
C:SnCu
T631
Taping
See table Below
R
Packaging
R: REEL
Nil: BOX
103
Nominal
Resistance
3 digits
K
Resistance
Tolerance
K: ±10%
M : ±20%
■Reference Standards
IEC 60115-1
JIS C 5201-1
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.
■Taping
Type
High Voltage Type Resistors
PCF1/2
PCF1
PCF2
Axial Taping
T52
T631
○
—
—
○
—
○
Contact us for lead forming details.
■Ratings
Type
PCF1/2
PCF1
PCF2
Power
Rating
0.5W
1.0W
2.0W
Resistance Range（Ω）
K：±10％
M：±20％
E12
E6
4.7½100k
3.3½390k
4.7½100k
3.3½390k
T.C.R.
（×10
−6
/K）
－500½－1300：3.3Ω≦R＜10Ω
－600½－1500：10Ω≦R＜100Ω
－700½－1800：100Ω≦R＜1kΩ
－900½－1900：1kΩ≦R＜100kΩ
－900½－2000：100kΩ≦R＜200kΩ
－900½－2200：200kΩ≦R≦390kΩ
Max.
Working
Voltage
200V
300V
400V
Max.
Overload
Voltage
400V
600V
800V
Dielectric
Withstanding
Voltage
500V
700V
Taping & Q'ty/reel
（pcs）
T52R
T631R
2,000
－
－
－
1,000
500
Rated Ambient Temperature：＋70℃
Operating Temperature Range：−40℃∼＋200℃
Rated voltage＝
√￣￣￣￣￣￣￣￣￣￣￣
or Max. working voltage, whichever is lower.
Power Rating×Resistance value
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
100
Percent rated power ％）
（
80
60
40
20
0
−60 −40 −20
0
20
40
607080 100 120 140 160 180 200
■One-Pulse Limiting Electric Power
One-Pulse Limiting Electric Power (W)
100,000
10,000
1,000
100
10
1
0.1
1
10
Pulse Duration (ms)
100
2C
1C
1/2C
Ambient temperature
（℃）
For resistors operated at the ambient temperature of 70℃ or higher, the power rating shall be
derated in accordance with the above derating curve.
1000
※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
Performance Requirements
ΔR±
（％＋0.05Ω）
Limit
Typical
25℃
Resistance
Resistance
Within specified tolerance
—
3.3Ω≦R<10Ω
10Ω≦R<100Ω
100Ω≦R≦390kΩ
－500½－1300：3.3Ω≦R＜10Ω
－600½－1500：10Ω≦R＜100Ω
－700½－1800：100Ω≦R＜1kΩ
－900½－1900：1kΩ≦R＜100kΩ
－900½－2000：100kΩ≦R＜200kΩ
－900½－2200：200kΩ≦R≦390kΩ
0½－0.20％/V
2
Measuring voltage
0.3V
1.0V
3.0V
Test Methods
T.C.R.
—
＋25℃/－40℃、＋25℃/＋75℃ and ＋25℃/＋125℃
Voltage coefficient
（Apply for 1kΩ or over）
Overload
（Short time）
—
0.4
Rated voltage and rated voltage×10％
Rated voltage×2.5 or Max. overload vol., whichever is lower, for 5s.
The resistor mounted on to the test circuit as below is applied with
high voltage impulse 10000 cycles.
Type
Test voltage
Performance
Requirements
⊿R±
（%+0.05Ω）
5
10
25
5
5
10
5
5
10
5
Resistance to pulse
Refer to the right table
—
10kV 4.7Ω≦R＜10kΩ
：
10kV 10kΩ≦R＜33kΩ
：
PCF1/2 10kV 33kΩ≦R≦100kΩ
：
4kV 10kΩ≦R≦100kΩ
：
14kV 3.3Ω≦R＜30kΩ
：
PCF1
14kV 30kΩ≦R≦390kΩ
：
7kV 30kΩ≦R≦390kΩ
：
20kV 3.3Ω≦R＜10kΩ
：
PCF2
20kV 10kΩ≦R≦390kΩ
：
11kV 10kΩ≦R≦390kΩ
：
Protection resistor
1secON
SW 1secOFF
DC
（Test voltage）
C=1,000pF
Rx
（In insulation oil）
High Voltage Type Resistors
High Voltage Type Resistors
Resistance to soldering heat
Rapid change of temp.
Moisture resistance
Load life
Resistance to solvent
2
2
5
5
No abnormality in appearance.
Marking shall be easily legible.
0.8
0.4
0.6
0.4
—
350℃±10℃、3.5s±0.5s
－40℃
（30min.）
/＋85℃
（30min.） cycles
5
40℃±2℃, 90%½95%RH, 1000h
1.5h ON/0.5h OFF cycles
70℃±2℃, 1000h
1.5h ON/0.5h OFF cycles
Dipping in IPA or Xylene for 3 min. and leaving for 10 min.after removing
drops, then brushing 10 times.
■Precautions for Use
・
Under the environment where surge like thunders etc. is apt to happen, the resistors used for open circuit, resistors connected directly to input, output or ground,
and resistors used for the circuit pulse applied to, may be destructed by surge or pulse. Therefore, the resistors need to be selected after sufficient check on the
supposition of the worst condition against possible surge and pulse.
・
Be careful to handle these resistors because outer coatings are comparatively weak to outer shock due to flameproof special coats. Pleasewash 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 coatingfilm of resistors for 20 minutes afterdrying.
Especially no PC boards shall be piled up.
・
When overload is impressed continuously by the trouble of the circuit part because this product is hard to be snapped, a resistor body continues being overheated
and emits smoke from a resistor and neighboring flammable materials and may catch fire. In a steady use state and heterology, please design the circuit so that
the surface temperature of this product is not as above 200 degrees Celsius.
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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