Thick Film Trimmable
Chip Resistors
Page 3/8
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5.1Power Der ating:
The rated power at the temperature in excess of 70℃ shall be derated in accordance
with figure 1.
100
P max.
Power ratio (%)
50
0
-55 50
70 100 155
Ambient
Temp. (
°
C )
Figure 1
5.2Rated Voltage:
The D.C. or A.C. continuous working voltage corresponding to the rated power
is determined by the following formula:
E= P * R E=Rated Voltage(V)
P=Rated Power(W)
R=Resistance Value(Ω)
6.Reliability Tests:(As specified in JIS C 5202)
Test Items Reference
standard Condition of Test Test Limits
Temperature Coefficient of
Resistance JIS-C5202-5.2 +25 ~ +125 ℃ Refer 5.0
Short Time Overload
JIS-C5202-5.5 2.5 X rated power for 5s ±(1% + 0.05Ω )
Remarks:
0402 : ±(2% + 0.1Ω )
0Ω : 50mΩ or less
Intermittent Overload Test
JIS-C5202-5.8 3.0 X rated power or Max Overloading Voltage,
1sec “ON”, 25sec “OFF”, 10000 cycles
(Remarks: 0201 / 0402 2.5 X RCW V *)
±(5.0%+0.1Ω)
0Ω : 50mΩ or less
Load Life
JIS-C5202-7.10 1000 hours at rated power , 70℃ , 1.5hours
“ON “, 0.5hour “OFF”
0.5%,1%:±(1.0%+0.05Ω)
2%,5%:±(3.0%+0.1Ω)
Remarks:
0402 : ±(3.0%+0.1Ω)
0Ω : 100mΩ or less
Load Life with Humidity
JIS-C5202-7.9 1000 hours at rated power , 40±2℃,
90~95% RH 1.5hours “ON “, 0.5hour “OFF”
0.5%,1%:±(1.0%+0.05Ω)
2%, 5%:±(3.0%+0.1Ω)
Remarks:
0402: ±(3.0%+0.1Ω)
0Ω : 100mΩ or less
Without mechanical damage