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Coating color : Light green
Marking : Color code |
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 Construction |
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| 1. |
Resistive body |
| 2. |
Inner electrode |
| 3. |
Electrode cap |
| 4. |
Lead wire |
| 5. |
Coating |
| 6. |
Marking |
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Features |
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KOA original ceramic resistors. |
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Excellent in anti-pulse characteristics. |
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More reliable than wirewound resistors and film resistors against disconnection failure. |
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Products meet EU-RoHS requirements. |
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Flame retardant coating.(Equivalent to UL-94 V-0) |
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Applications |
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High voltage circuits for X-ray generators and electron microscopes. |
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Power supply circuits for machine tools, etc. |
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| Type |
Dimensions (mm) |
Weight (g)
(1000pcs) |
L 1 |
C max. |
D |
d (Nominal) |
 3 |
| PCF1/2 |
9.0 |
11.1 |
3.5 0.5 |
0.7 |
30.0 |
450 |
| PCF1 |
16.5 |
19.0 |
5.5 1.0 |
0.8 |
38.0 |
1340 |
| PCF2 |
19.0 |
22.5 |
7.0 1.0 |
2240 |
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| PCF |
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1 |
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C |
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T631 |
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R |
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103 |
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K |
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| Product Code |
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Power Rating |
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Terminal
Surface Material |
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Taping |
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Packaging |
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Nominal
Resistance |
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Resistance
Tolerance |
PCF
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1/2 : 0.5W
1 : 1.0W
2 : 2.0W |
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C : SnCu
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See table Below
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R : REEL
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3digits |
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K : 10%
M : 20% |
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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 Common Specification. |
| Type |
Axial Taping |
| T52 |
T631 |
| PCF1/2 |
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| PCF1 |
- |
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| PCF2 |
- |
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| Type |
Power
Rating |
Resistance
Range |
T.C.R.
(×10-6/K) |
Max. Working Voltage |
Max. Overload Voltage |
Max. Pulse Voltage
*1 |
Dielectric Withstanding Voltage |
K : 10%
E12 |
M : 20%
E6 |
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PCF1/2C |
0.5W |
4.7  100k |
4.7 100k |
-900300 : R<100
-1200300 : R 100 |
200V |
400V |
10kV |
500V |
| PCF1C |
1.0W |
3.3 390k |
3.3 390k |
300V |
600V |
14kV |
| PCF2C |
2.0W |
400V |
800V |
20kV |
700V |
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Rated Ambient Temperature : +70
Operating Temperature Range : -40+200
Rated voltage=√(Power Rating×Resistance value) or Max. working voltage, whichever is lower.
*1 The maximum pulse voltage in the “Resistance to pulse” examination
condition of the performance column. |
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For resistors operated at an ambient temperature of 70or above, a power
rating a shall be derated in accordance with the derating curve on the left. |
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Application Notes
Brush up your circuit
Basic Knowledge
