Spec No.JEFL243C-0010N-01
P3/9
MURATA MFG.CO.,LTD
9. Environmental Performance(Products shall be soldered on the substrate.)
No. Item Specification Test Method
9.1 Temperature
Cycle
Meet Table 1.
1 Cycle
Step 1 -40°C(+0°C,-3°C) / 30±3 min
Step 2 Ordinary Temp. / 10 to 15 min
Step 3 +85°C(+3°C,-0°C) / 30±3 min
Step 4 Ordinary Temp. / 10 to 15 min
Total of 100 cycles
Then measured after exposure in the
room condition for 4 to 48 h
9.2 Humidit
Temperature : 40±2°C
Humidity : 90~95%(RH)
Time : 1000(+48 h,-0 h)
Then measured after exposure in the
room condition for 4 to 48 h.
9.3 Heat life Temperature : 85±2°C
Applying Voltage : 2times for Rated Voltage
Time : 1000(+48 h,-0 h)
Then measured after exposure in the
room condition for 4 to 48 h. (ref.item 10)
9.4 Cold Resistance Temperature : -40± 2°C
Time : 1000(+48 h,-0 h)
Then measured after exposure in the
room condition for 4 to 48 h.
10. Terminal to be Tested.
When measuring and suppling the voltage, the following terminal is applied.
No. Item Terminal to be Tested
10.1 Common Mode Impedance
(Measurement Terminal)
10.2 Withstanding Voltage
(Measurement Terminal)
10.3 DC Resistance
(Measurement Terminal)
10.4 Insulation Resistance
(Measurement Terminal)
10.5 Heat Life(Supply Terminal)
11. Measuring method for common mode impedance.
Measured common mode impedance may be included measurement error due to stray capacitance,
residual inductance of test fixture.
To correct this error, the common mode impedance should be calculate as follows;
(1) Measure admittance of the fixture(opened), Go Bo.
(2) Measure impedance of the fixture(shorted), Rs Xs.
(3) Measure admittance of the specimen, Gm Bm.
(4) Calculate corrected impedance Z using the formula below.
Z = (Rx
2
+Xx
2
)
1/2
Where
Rx =
Gm-Go
(Gm-Go)
２
+ (Bm-Bo)
２
- Rs
Xx =
-(Bm- Bo)
(Gm-Go)
２
+ (Bm-Bo)
２
- Xs
Terminal
Terminal
Terminal
Terminal
Terminal
Terminal
Terminal
Terminal
Terminal
Terminal
