Thick Film Chip Resistors
DERATING CURVE
For resistors operated at ambient temperature over 70°, power rating shall be derated in accordance with figure
1.
Figure 1
The rated voltage is calculated by the following formula:
E= √P * R
E=Rated Voltage(V),
P=Rated Power(W),
R=Resistance Value(ꢀ)
RELIABILITY TESTS
Reference
standard
Test Items
Condition of Test
Test Limits ∆R
Temperature
Coefficient of
Resistance
IEC60115ꢁ1ꢁ4.8
JISꢁC5201ꢁ1ꢁ4.8
ꢁ55~+125 °C
Refer 5.0
±(1% + 0.05ꢀ)
Remarks:
0201 : ±(3% + 0.1ꢀ)
0ꢀ : 50mꢀ or less
Short Time
Overload
IEC60115ꢁ1ꢁ4.13
JISꢁC5201ꢁ1ꢁ4.13
2.5 X rate voltage for 5 sec
0402 : ±(2% + 0.1ꢀ)
3.0 X rated voltage or Max
Overloading voltage, 1sec “ON”,
25sec “OFF”, 10000 cycles
Remarks: 0201ꢁNA, 0402 2.5 X
RCWV*)
±(5.0% + 0.1ꢀ)
Intermittent
Overload
IEC60115ꢁ1ꢁ4.39
JISꢁC5201ꢁ1ꢁ4.39
0ꢀ : 50mꢀ or less
0.1%, 0.5%, 1% : ±(1.0% + 0.05ꢀ) 2%, 5% : ±(3.0%+ 0.1ꢀ)
Remarks:
IEC60115ꢁ1ꢁ4.25.1
JISꢁC5201ꢁ1ꢁ
4.25.1
Endurance (Load
Life)
1000 hours at rated voltage, 70°C,
1.5hours “ON”, 0.5hour “OFF”
0201 : ±(5% + 0.1ꢀ)
0ꢀ : 100mꢀ or less
0402 : ±(3% + 0.1ꢀ)
0.1%, 0.5%, 1% : ±(1.0% + 0.05ꢀ) 2%, 5% : ±(3.0%+ 0.1ꢀ)
Remarks:
1000 hours at rated voltage,
40±2°C, 90~95% RH 1.5hours
“ON”, 0.5hour “OFF”
Load Life with
Humidity
IEC60115ꢁ1ꢁ4.24
JISꢁC5201ꢁ1ꢁ4.24
0201 : ±(5.0% + 0.1ꢀ)
0ꢀ : 100mꢀ or less
0402 : ±(3.0% + 0.1ꢀ)
0.1%, 0.5%, 1% : ±(0.5% + 0.05ꢀ) 2%, 5% : ±(1.0%+0.05ꢀ)
ꢁ55°C (30 min.) / +155°C (30 min.) 5 Remarks:
Rapid Change of
Temperature
IEC60115ꢁ1ꢁ4.19
JISꢁC5201ꢁ1ꢁ4.19
cycles
0201 : ±(3% + 0.1ꢀ)
0ꢀ : 50mꢀ or less
IEC60115ꢁ1ꢁ4.17
JISꢁC5201ꢁ1ꢁ4.17
245±5°C solder, 2±0.5 sec dwell.
Solder: Sn96.5 / Ag3.0 / Cu0.5
At least 95% of surface area of electrode shall be covered with
new solder
Solderability
0.1%, 0.5%, 1% : ±(0.5% + 0.05ꢀ) 2%, 5% : ±(1.0%+0.05ꢀ)
Remarks:
0201 : ±(1.0% + 0.1ꢀ)
0ꢀ : 50mꢀ or less
Robustness of
Termination
(Bending)
IEC60115ꢁ1ꢁ4.33
JISꢁC5201ꢁ1ꢁ4.33
3mm deflection
2mm deflection (RM20,25)
Dielectric
Applying voltage:
0201: 50V, 0402 & 0603: 300V The
other 500V for a minute
Withstanding
Voltage (Voltage
Proof)
IEC60115ꢁ1ꢁ4.7
JISꢁC5201ꢁ1ꢁ4.7
No abnormalities such as flashover, burning dielectric
breakdown shall appear
Insulation
Resistance
IEC60115ꢁ1ꢁ4.6
JISꢁC5201ꢁ1ꢁ4.6
IEC60115ꢁ1ꢁ4.23.2
JISꢁC5201ꢁ1ꢁ
4.23.2
Applying voltage 100V for 1 minute.
Remark: 0201 50V
≥ 1Gꢀ
0.1%, 0.5%, 1% : ±(1.0% + 0.05ꢀ) 2%, 5% : ±(2.0% + 0.1ꢀ)
Remarks:
0201 : ±(2.0% + 0.1ꢀ)
Resistance to
Dry Heat
155±5°C for 96±4hours
Remark: 0201 125±5°C
0ꢀ : 50mꢀ or less
0.1%, 0.5%, 1% : ±(0.5% + 0.05ꢀ) 2%, 5% : ±(1.0% + 0.05ꢀ)
Remarks:
Resistance to
Solder Heat
IEC60115ꢁ1ꢁ4.18
JISꢁC5201ꢁ1ꢁ4.18
270±5°C solder, 10±1 sec dwell.
0201 : ±(3.0% + 0.1ꢀ)
0ꢀ : 50mꢀ or less
Note: RCWV: Rated continuous working voltage
3
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