RR00-1097
Specification for
Chip resistor RR1220 series
0
3/14
4.2 Rated dissipation at 70deg C
０
.
１Ｗ
[
JIS Code 2A
]
Rated dissipation is based on continuous full load operation at rated ambient temperature of 70deg C.
For resistors operated at ambient temperature in excess of 70deg C, the maximum load shall be derated
in accordance with the following curve.
4.3 Rated voltage
The d.c. or a.c. r.m.s voltage shall be calculated from the following expression.
When the rated voltage exceeds the limiting element voltage, the limiting element voltage shall be the
rated voltage.
E=
√
R
×
P Where E : Rated voltage
（Ｖ）
R : Rated resistance
（Ω）
P : Rated dissipation
（Ｗ）
4.4 Limiting element voltage
4.5 Maximum overload voltage
4.6 Operating temperature range
4.7 Storage temperature range
100
Ｖ
200
Ｖ
-55 to +125 deg C
-55 to +125 deg C
5. Marking
5.1 Marking in E24 series
A rated resistance shall be marked on the protect coating with three digit of number.
See para.2. (3)
(Example) 3.9k
Ω→
39 00
→
392
5.2 Marking in E96 series
A manufacturing date code or four digit of number shall be marked on the protect coating.
(1) A manufacturing date code
Refer to JIS C 5201-1 Annex 1 Table5
(2) Four digit of number
See para.2. (3)
(Example) 49.9k
Ω→
499 00
→
4992
Area of
Recommended
operation
Percentage of the
rated dissipation
-55 70 125 deg C
%
100
50
