17
Reference Standards
JIS C 5201-1
KNP-C series
WIRE WOUND RESISTORS, FLAMEPROOF, ANTI-SURGE
ELECTRICAL AND MECHANICAL PERFORMANCE
ENVIRONMENTAL CHARACTERISTICS
1. Excellent anti-surge characteristics - 6KV according to
I
EC 61000-4-5.
2. Super heat dissipation; small linear temperature
coefficient.
3. Flameproof painting, resistant to heat & solvents.
Features
1. IEC 61000-4-5 6KV
2.
3.
Characteristics
Characteristics
Resistance Tolerance
Resistance Temp. Coeff.
Power Rating Load
Short Time Overload
Dielectric Withstanding Voltage
Insulation Resistance
Terminal Strength
Surge Voltage Withstanding
Solder-ability
Resistance to Soldering Heat
Temp. Cycle
Load Life
Moisture-proof Load Life
Nonflammability
Standards
Standards
5% ( J ) or 2% ( G )
R/R 1%
300 ppm /
R/R 3%
R/R 3%
2%
Minimum 95% coverage
95%
No evidence of mechanical damage.
, R/R 1%
No evidence of mechanical damage.
No evidence of mechanical damage
or insulation breakdown.
10 times of rated wattage
for 5 seconds.
R/R
5%
Test Methods
Test Methods
-
-55 ( 30 min.) Room Temp.( 3 min.)
+200 ( 30 min.)
Room Temp.( 3 min.) / ( 5 cycles)
-55 ~ 200
Rated power load 90 minutes ON
30 minutes OFF
70 1000 hours
Rated power load 90 minutes ON
30 minutes OFF
40 95% RH 1000 hours
16 times of rated wattage for 5 min.
235 5 for 2 seconds
DC 500V megger
270 5 for 10 1 seconds
350 10 for 3.5 0.5 seconds
2.5 kg
20 pulses(1.2/50us), max. 60s
between each pulse.
10 / 5
1,000MÙ
not flamed
Surface temp. 275 Max.
275 , R/R 0.5%
Rated voltage for 30 minutes
/ 30
AC 500V for 1 minutes
AC 500V 1
18
KNP-C series
-55
70
0 50 -50
20 40 60 80 100
100 150 200 250 275
0
0
20
0
40
60
100
80
100
200
300
H DL H
Derating Curve
How to order
For resistors operated in ambient temperatures above 70 ,
power rating must be derated in accordance with the curve
below.
T/B
a. b. c. d.
e.
f.
Unit mm
3WL
5.5
15 38
0.8
0.1~1K
D1
L1 H3
d0.1
Resistance
Range(Ù)
It is composed by Type, Rated Wattage, Nominal Resistance, Tolerance, Anti-Surge and Package. e.g.
a. Type( ): Wire Wound Resistors, Flameproof are called "KNP".
b. Rated Wattage( ) : Shown by "W", such as 3WL.
c. Nominal Resistance( ) : 10Ù.
d. Tolerance( ): G 2% , J 5% .
e. C Letter "C" indicates anti-surge ( "C" ).
f . Package ( ):
T/R tape & reel ( ); T/B tape in box( ); Nil Bulk( ).
d
Dimensions
Ambient Temp.
O
(C)
Rated Load
(%)
Rated Load
(%)
Surface Temperature Rise
O
(C)
Surface Temperature Rise
Rated
Wattage
Too low or too high ohmic values can be supplied only case by case.Note:
KNP
3WL
10R
J
C