Spec No. JETE243A-0036C-01 P 6/7
MURATA MFG.CO., LTD
Reference Only
Cycle of reflow 2 times
11.4 Solder Volume
・Solder shall be used not to be exceeded the upper limits as shown below.
・Accordingly increasing the solder volume, the mechanical stress to Chip is also increased.
Exceeding solder volume may cause the failure of mechanical or electrical performance.
1/3T≦t≦T
T： thickness of electrode
11.5 Product's location
The following shall be considered when designing and laying out P.C.B.’s.
(1) P.C.B. shall be designed so that products are not subject to the mechanical stress due to warping the board.
［Products direction］
Products shall be located in the sideways
direction to the mechanical stress.
(2) Components location on P.C.B. separation.
It is effective to implement the following measures, to reduce stress in separating the board.
It is best to implement all of the following three measures; however, implement as many measures
as possible to reduce stress.
Contents of Measures Stress Level
(1) Turn the mounting direction of the component parallel to
the board separation surface.
A > D ∗1
(2) Add slits in the board separation part. A > B
(3) Keep the mounting position of the component away from
the board separation surface.
A > C
∗1 A > D is valid when stress is added vertically to
the perforation as with Hand Separation.
If a Cutting Disc is used, stress will be diagonal to
the PCB, therefore A > D is invalid.
(3) Mounting Components Near Screw Holes
When a component is mounted near a screw hole,
it may be affected by the board deflection that occurs
during the tightening of the screw. Mount the component
in a position as far away from the screw holes as possible.
11.6 Resin coating
The inductance value may change and/or it may affect on the product's performance due to high cure-stress
of resin to be used for coating/molding products. So please pay your careful attention when you select resin.
In prior to use, please make the reliability evaluation with the product mounted in your application set.
11.7 Temperature rating of the circuit board and components located around
Temperature may rise up to max. 40 ℃ when applying the rated current to the Products.
Be careful of the temperature rating of the circuit board and components located around.
11.8 Caution for use
There is possibility that the inductance value change due to magnetism. Don‘t use a magnet or a pair of tweezers
with magnetism when chip coil are handled. (The tip of the tweezers should be molded with resin or pottery.)
Upper Limit
Recommendable
t
〈
Poor example
〉
〈
Good example
〉
b
a
Perforation
Slit
A
B
C
D
Screw Hole
Recommended
