19
RD series
CARBON FILM RESISTORS
ELECTRICAL AND MECHANICAL PERFORMANCE
ENVIRONMENTAL CHARACTERISTICS
1. Pure carbonhydric on ceramic cores.
2. Low cost.
3. Good quality and reliability.
4. Provide flameproof type, RDN.
Features
1.
2.
3.
4. RDN
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
5% ( J ) or 2% ( G )
R/R 1%
0~-1300 ppm /
R/R 5%
R/R 5%
1%
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 voltage
for 5 seconds.
Test Methods
Test Methods
-
-55 ( 30 min.) Room Temp.( 3 min.)
+155 ( 30 min.)
Room Temp.( 3 min.) / ( 5 cycles)
-55 ~ 155
Rated power load 90 minutes ON
30 minutes OFF
70 1000 hours
Rated power load 90 minutes ON
30 minutes OFF
40 95% RH 500 hours
16 times of rated wattage for 5 min.
235 5 for 2 seconds
DC 100V or 500V megger
270 5 for 10 1 seconds
350 10 for 3.5 0.5 seconds
< 1/4W 1 kg
> 1/2W 1.5 kg
2.5 / 5
10,000MÙ
Max. Overload Voltage for 1 min.
1
( RDN 1 W & 2 W AC 350V )
Reference Standards
IEC 60115-2
JIS C 5201-2
Surface temp. 235 Max.
235 , R/R 1%
Rated voltage for 30 minutes
/ 30
Nonflammability
not flamed
20
RD series
-55
70
0 50 -50
20 40 60 80 100
100 150 200 235
0
0
20
40
60
50
80
100
100
150
0
H DL H
1/4WS
1/4W
1/8W
1W
2W
1/2WS
1/2W
RDN
RD
155
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.
It is composed by Type, Rated Wattage, Nominal Resistance, Tolerance and Package. e.g.
a. Type( ): Carbon Film Resistors are called "RD".
b. Rated Wattage( ) : Shown by "W", such as 1/8W(1/6W,1/4WS),
1/4W(1/2WS),1/2W,1W,2W.
c. Nominal Resistance( ) : 10Ù.
d. Tolerance( ): G 2% , J 5% .
e. Package ( ):
T/R tape & reel ( ); T/B tape in box( ); Nil Bulk( ).
Unit mm
RD 1/8W,
1/6W(1/4WS)
RD 1/4W(1/2WS)
RD 1/2W
RDN 1W
RDN 2W
1.7 0.2
2.4 0.5
3.5
4.5
5.0
3.7Max.
6.4
9
11
15
28
28
28
28
28
0.45
0.6
0.65
0.8
0.8
3.9~4.7M
3.9~10M
3.9~10M
3.9~10M
3.9~10M
200V
250V
350V
500V
750V
D1 L1 H3 d0.1
Resistance
Range(Ù)
Max.
Working
Voltage
d
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 100KÙ 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. Resistance values over 4.7MÙ( 4.7MÙ), while RD 1/8W is 1MÙ,
the tolerance shall be 10%.
5. RD 1/4W, 1/2W can also be supplied flameproof coating (RDN).
Note:
RD 1/4W 10R J T/B