POWER TYPE RESISTORS
CERAMIC
ANTI SURGE
STRUCTURE
U max.
⑤
⑥
①
④
②
③
1 Metal oxide composition
2 Inner electrode
3 Electrode cap
4 Lead wire
5 Coating
6 Marking
HIGH VOLTAGE
PCF
H
L
H
D
C max.
IDENTIFICATION
PRODUCT CODE
COATING COLOR
MARKING
All these products have Pb-free terminations
and meet EU-RoHS requirements
Color Code
(R-value and tolerance)
PCF
Light green
TYPE DESIGNATION (HOW TO ORDER)
*
Contact us when you have control
request for environmental
hazardous material other than the
substance specified by EU-RoHS
PCF
1
R
473
M
C
T631
POWER RATING
Unit: Watt
TERMINATION
SURFACE MATERIAL
C: SnCu
TAPING &
FORMING
PACKAGING
R: Reel
NOMINAL
RESISTANCE
3 digits
RESISTANCE
TOLERANCE
K: ( 10ꢀ)
PRODUCT CODE
1/2, 1, 2
M: ( 20ꢀ)
*Please see “PACKAGING”
FEATURES
DIMENSIONS (mm)
■ KOA original ceramic resistor
TYPE
L
C max.
U max. d (nominal)
H
D
■ Excellent characteristic against high voltage surge current
■ Higher reliability for disconnection failure compared to wirewound
resistors and film resistors
■ Able to replace carbon composition resistors in most applications
■ Flame retardant coating (Equivalent to UL94 V-0)
■ Meets or exceeds IEC 60115-1, JIS C 5201-1
PCF 1/2 C 9.0 1.0
3.5 0.5
5.5 1.0
7.0 1.0
11.1
19.0
22.5
1.5
2.2
2.9
0.7
0.8
30
38
3
3
PCF 1 C
PCF 2 C
16.5 1.0
19.0 1.0
■ Suitable for use in high voltage circuits for X-ray generators and
electron microscopes or power supply circuits for machine tools, etc.
■ Rated ambient temperature: +70°C
■ Operating temperature range: -40°C... +200°C
RESISTANCE TO PULSE*
The resistor mounted to the test cicuit as below is applied with
high voltage impulse 10.000 cycles.
DERATING CURVE
For resistors operated in
ambient temperature over
+70°C, power rating shall
be derated like shown in
the “DERATING CURVE”.
Protection resistor
Ambient temperature (°C)
RATING
RESISTANCE RANGE
MAX.
WORKING
VOLTAGE
MAX.
OVERLOAD
VOLTAGE
DIELECTRIC
WITHSTANDING
VOLTAGE
IMPULSE*
WITHSTANDING
VOLTAGE
T.C.R.
(ppm/K)
POWER
RATING
TYPE
E12
E6
K( 1ꢀ0)
M( 2ꢀ0)
R < 100Ω:
-900... 300
R ≥ 100Ω:
PCF 1/2 C
0.5 W
200 V
400 V
10 kV
4.7Ω ...100kΩ 4.7Ω...100kΩ
3.3Ω ... 390kΩ 3.3Ω...390kΩ
500 V
700 V
PCF 1 C
PCF 2 C
1.0 W
2.0 W
300 V
400 V
600 V
800 V
14 kV
20 kV
-1300... 300
* Please refer to “RESISTANCE TO PULSE” circuit.
Rated voltage =zPower rating x resistance value or max. working voltage, whichever is lower.
EUROPE GmbH • Kaddenbusch 6 • D-25578 Dägeling / ITZEHOE • PHONE: +49 (0) 48 21/89 89-0 • FAX: +49 (0) 48 21/89 89 89 • Internet: www.koaeurope.de
Revision: 20. Nov. 2010
121