RN series
PRECISION METAL FILM RESISTORS
Features
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.
1.
2.
3.
4.
25ppm
0.25%
50ppm
0.5%
100ppm
1%
5%
0.1% / 25ppm
ELECTRICAL AND MECHANICAL PERFORMANCE
Characteristics
Resistance Tolerance
Resistance Temp. Coeff.
Power Rating Load
Short Time Overload
1% ( F ) or
25 ppm /
100 ppm /
Standards
0.5% ( D )
50 ppm /
-65
-
~ 175
Test Methods
Surface temp. 175 Max.
175 , R/R
1%
0.5%
No evidence of mechanical damage
or insulation breakdown.
Rated voltage for 30 minutes
/ 30
2.5 times of rated valtage
for 5 seconds.
2.5
/5
Max. Overload Voltage for 1 min.
1
( RN 1 W & 1 WL AC 350V
RN 1/4 WS AC 300V )
Dielectric Withstanding Voltage
Insulation Resistance
Terminal Strength
Solder-ability
10,000MÙ
No evidence of mechanical damage.
DC 100V or 500V megger
1 kg
235 5
for 2 seconds
Minimum 95% coverage
95%
No evidence of mechanical damage.
Resistance to Soldering Heat
, R/R
1%
270 5 for 10 1 seconds
350 10 for 3.5 0.5 seconds
ENVIRONMENTAL CHARACTERISTICS
Characteristics
Temp. Cycle
Load Life
Moisture-proof Load Life
Nonflammability
Reference Standards
IEC 60115-1
JIS C 5201-1
Standards
R/R
R/R
R/R
0.25%
2%
1.5%
Test Methods
-65 ( 30 min.)
Room Temp.( 3 min.)
+175 ( 30 min.)
Room Temp.( 3 min.) / ( 5 cycles)
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
not flamed
16 times of rated wattage for 5 min.
(RN 1W & RN 1WL)
21
RN series
Dimensions
Unit mm
d
H
L
H
D
Rated
Wattage
1/8W
1/4WS
1/4W
1/2WS
0.6W
1/2W
1W
1WL
D 1
L 1
H 3
Resistance
d 0.1
Range(Ù)
Max.
Working
Voltage
1.7 0.2 3.7max. 28
1.7 0.2 3.7max. 28
28
2.4 0.5 6.4
28
2.4 0.5 6.4
28
2.4 0.5 6.4
9
28
3.5
11
28
4.5
15
28
5.0
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
Derating Curve
Note:
1. To prevent electric corrosion, the resistance over 100K
Ù
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.
Surface Temperature Rise
150
For resistors operated in ambient temperatures above 70 ,
power rating must be derated in accordance with the curve
below.
100
80
-65
70
1WL
Surface Temperature Rise
(
O
C)
Rated Load
(%)
100
60
40
20
0
50
1W
0.6W
1/2WS
1/2W
1/4WS
1/4W
1/8W
-40
0
40
80
120
140
160
175
Ambient Temp.
(
O
C)
0
0
20
40
60
80
100
How to order
Rated Load
(%)
It is composed by Type, Rated Wattage, Nominal Resistance, Tolerance ,Temperature Coefficient
and Package. e.g.
RN
a.
1/4W
b.
10Ù
c.
F
d.
50ppm
e.
T/B
f.
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) .
e. Temperature Coefficient (
): 25ppm/
O
C, 50ppm/
O
C, Nil
f . Package (
):
T/R tape & reel (
); T/B tape in box(
); Nil Bulk(
).
100ppm/
O
C
22
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