GR442QR7LB102KW01L Datasheet, PDF (209/237 Pages) Murata Manufacturing Co., Ltd. – chip monolithic ceramic capacitors

!Note • Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog has only typical specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.
C02E.pdf
Oct.1,2012
Continued from the preceding page.
3. Fail-safe
Failure of a capacitor may result in a short circuit. Be sure
to provide an appropriate fail-safe function such as a fuse
on your product to help eliminate possible electric shock,
fire, or fumes.
AC IN
Please consider using fuses on each AC line if the
capacitors are used between the AC input lines and earth
(line bypass capacitors), to prepare for the worst case,
such as a short circuit.
!Caution
FUSE
4. Test Condition for AC Withstanding Voltage
(1) Test Equipment
Tests for AC withstanding voltage should be made with
equipment capable of creating a wave similar to a
50/60 Hz sine wave.
If the distorted sine wave or overload exceeding the
specified voltage value is applied, a defect may be
caused.
*ZERO CROSS is the point where voltage sine wave
passes 0V.
- See the figure at right -
(2) Voltage Applied Method
The capacitor's leads or terminals should be firmly
connected to the output of the withstanding voltage test
equipment, and then the voltage should be raised from
near zero to the test voltage. If the test voltage is applied
directly to the capacitor without raising it from near zero,
it should be applied with the zero cross.* At the end of the
test time, the test voltage should be reduced to near zero,
and then the capacitor's leads or terminals should be
taken off the output of the withstanding voltage test
equipment. If the test voltage is applied directly to the
capacitor without raising it from near zero, surge voltage
may occur and cause a defect.
Voltage sine wave
0V
zero cross
Soldering and Mounting
1. Vibration and Impact
Do not expose a capacitor to excessive shock or vibration
during use.
2. Circuit Board Material
It is possible for the chip to crack by the expansion and
shrinkage of a metal board.
Please contact us if you want to use our ceramic
capacitors on a metal board such as Aluminum.
3. Land Layout for Cropping PC Board
Choose a mounting position that minimizes the stress imposed on the chip during flexing or bending of the board.
[Component Direction]
<Example
to be avoided>
<Example
of improvement>
Locate chip
horizontal to the
direction in which
stress acts.
[Chip Mounting Close to Board Separation Point]
Perforation
C
B
D
A
Slit
Chip arrangement
Worst AGCGB~D Best
Continued on the following page.
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