Spec No. JEFL243E-0004W P3/9
MURATA MFG.CO., LTD
Reference Only
9.Environmental Performance (Products shall be soldered on the glass-epoxy 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,-0) min
Step 2 Ordinary Temp. / within 3 min
Step 3 +85(+3°C,-0°C) / 30(+3,-0) min
Step 4 Ordinary Temp. / within 3 min
Total of 100 cycles.
Then measured after exposure in the room condition
for 4 to 48 h.
9.2 Humidity Temperature : 40±2°C
Humidity : 90 to 95 % (RH)
Time : 1000 h(+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
Test Voltage : 2 times for Rated Voltage
Time : 1000 h(+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 h(+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 supplying the voltage,the following terminal is applied.
No. Item Terminal to be Tested
10.1 Common Mode
Impedance
10.2
Withstanding Voltage
Insulation Resistance
Heat Life
10.3 DC Resistance
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
12. P.C.B., Flux, Solder and Soldering condition
Test shall be done using P.C.B., Flux, Solder and Soldering condition which are
specified in item 16 except the case of being specified special condition.
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