27
Reference Standards
IEC 60115-4
JIS C 5201-4
RSU series
METAL OXIDE FILM RESISTORS (ULTRA SMALL TYPE)
()
ELECTRICAL AND MECHANICAL PERFORMANCE
ENVIRONMENTAL CHARACTERISTICS
1. Ultra high thermal conductivity material, excellent
power dissipation in small volume.
2. Fla
meproof painting, resistance to heat & solvents.
3. Annual shift is low for the strengthened metal oxide film.
Features
1.
2.
3.
Characteristics
Characteristics
Resistance Tolerance
Resistance Temp. Coeff.
Power Rating Load
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%
300 ppm /
R/R 5%
R/R 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.
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
DC100V megger
270 5 for 10 1 seconds
350 10 for 3.5 0.5 seconds
1W 1 kg
2W & 3W 2.5 kg
1,000MÙ
Surface temp. 235 Max.
235 , R/R 1%
Rated voltage for 30 minutes
/ 30
AC 350V for 1 minutes
AC 350V 1
Nonflammability
not flamed
28
RSU series
-55
70
0 50
20 40 60 80 100
3W
2W
1W
100 150 200 235
0
0
20
0
40
60
100
80
100
200
300
H DL H
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.
Unit mm
1W
2W
3W
3.5
5
2.6 0.5
6.8
9
15
28
28
28
0.6
0.8
0.8
0.22~1M
0.22~1M
0.22~1M
350V
500V
750V
D1 L1 H3 d0.1
Resistance
(Ù)
Max.
Working
Voltage
It is composed by Type, Rated Wattage, Nominal Resistance, Tolerance and Package. e.g.
a. Type( ): Metal Oxide Film Resistors ( Ultra Small Type ) are called "RSU".
b. Rated Wattage( ) : Shown by "W", such as 1W, 2W, 3W.
c. Nominal Resistance( ) : 10Ù
d. Tolerance( ): G 2% , J 5% .
e. 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
Rate Continuous Working Voltage ( RCWV ) shall be determined
Rated Power X Resistance Value or Max. Working Voltage listed above,
whichever less.
-50
RSU 1W 10R J T/B