21
Reference Standards
IEC 60115-1
JIS C 5201-1
RN series
PRECISION METAL FILM RESISTORS
ELECTRICAL AND MECHANICAL PERFORMANCE
ENVIRONMENTAL CHARACTERISTICS
1. Low T.C. 25ppm 50ppm 100ppm.
2. High precision 0.25% 0.5% 1% 5%.
3. Temperature stable, low noise, good reliability.
4. 0.1% / 25ppm case by case.
Features
1. 25ppm 50ppm 100ppm
2. 0.25% 0.5% 1% 5%
3.
4. 0.1% / 25ppm
Characteristics
Characteristics
Resistance Tolerance
Resistance Temp. Coeff.
Power Rating Load
Short Time Overload
Dielectric Withstanding Voltage
Insulation Resistance
Terminal Strength
Solder-ability
Resistance to Soldering Heat
Temp. Cycle
Load Life
Moisture-proof Load Life
Standards
Standards
1% ( F ) or 0.5% ( D )
R/R 0.25%
25 ppm / 50 ppm /
100 ppm /
R/R 2%
R/R 1.5%
0.5%
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.
2.5 times of rated valtage
for 5 seconds.
Test Methods
Test Methods
-
-65 ( 30 min.) Room Temp.( 3 min.)
+175 ( 30 min.)
Room Temp.( 3 min.) / ( 5 cycles)
-65 ~ 175
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.
(RN 1W & RN 1WL)
235 5 for 2 seconds
DC 100V or 500V megger
270 5 for 10 1 seconds
350 10 for 3.5 0.5 seconds
1 kg
2.5 / 5
10,000MÙ
Max. Overload Voltage for 1 min.
1
( RN 1 W & 1 WL AC 350V
RN 1/4 WS AC 300V )
Surface temp. 175 Max.
175 , R/R 1 %
Rated voltage for 30 minutes
/ 30
Nonflammability
not flamed
22
RN series
0 40 -40
20 40 60 80 100
80 120 140 160 175
0
20
40
60
50
80
100
150
0
1W
1WL
0.6W
1/2WS
1/2W
1/4WS
1/4W
1/8W
-65
70
100
Derating Curve
How to order
For resistors operated in ambient temperatures above 70 ,
power rating must be derated in accordance with the curve
below.
a. b. c.
d.
e. f.
It is composed by Type, Rated Wattage, Nominal Resistance, Tolerance ,Temperature Coefficient
and Package. e.g.
a. Type( ): Precision Metal Film Resistohrs are Called "RN".
b. Rated Wattage( ) : Shown by "W", such as 1/8W,1/4WS,
1/4W,1/2WS,0.6W,1/2W,1W,1WL.
c. Nominal Resistance( ) : 10Ù.
d. Tolerance( ): 0.5%(D), 1%(F) .
OO O
e. Temperature Coefficient ( ): 25ppm/ C, 50ppm/ C, Nil 100ppm/ C
f . Package ( ):
T/R tape & reel ( ); T/B tape in box( ); Nil Bulk( ).
Unit mm
1/8W
1/4WS
1/4W
1/2WS
0.6W
1/2W
1W
1WL
1.7 0.2
1.7 0.2
2.4 0.5
2.4 0.5
2.4 0.5
3.5
4.5
5.0
3.7max.
3.7max.
6.4
6.4
6.4
9
11
15
28
28
28
28
28
28
28
28
0.45
0.45
0.6
0.6
0.6
0.65
0.8
0.8
10~1M
10~1M
10~2M
10~2M
10~2M
10~2M
10~2M
10~2M
150V
200V
250V
300V
350V
350V
500V
500V
D1
L1
H3 d0.1
Resistance
Range(Ù)
Max.
Working
Voltage
Dimensions
Ambient Temp.
O
(C)
Rated Load
(%)
Rated Load
(%)
Surface Temperature Rise
O
(C)
Surface Temperature Rise
Rated
Wattage
1. To prevent electric corrosion, the resistance over 100K should be
limited at 50V
2. Too low or too high ohmic values can be supplied only case by case.
3. Max. Overload Voltage is 2 times of Max. Working Voltage.
4. RN 1W & RN 1WL is coated by flameproof paint.
Ù
.
Note:
H DL H
d
0
RN 1/4W 10R F 50ppm T/B