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GRM21BR11C474JA01 Datasheet(数据表) 21 Page - Murata Manufacturing Co., Ltd

部件型号  GRM21BR11C474JA01
说明  Chip Monolithic Ceramic Capacitor for General
下载  30 Pages
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制造商  MURATA1 [Murata Manufacturing Co., Ltd]
网页  http://www.murata.com
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GRM21BR11C474JA01 Datasheet(HTML) 21 Page - Murata Manufacturing Co., Ltd

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(1) Example of a suitable jig
[In the case of Single-side Mounting]
An outline of the board separation jig is shown as follows.
Recommended example: Stress on the component mounting position can be minimized by holding the
portion close to the jig, and bend in the direction towards the side where the capacitors are mounted.
Not recommended example: The risk of cracks occurring in the capacitors increases due to large stress
being applied to the component mounting position, if the portion away from the jig is held and bent in the
direction opposite the side where the capacitors are mounted.
[Outline of jig]
[Hand Separation]
[In the case of Double-sided Mounting]
Since components are mounted on both sides of the board, the risk of cracks occurring can not be avoided with the
above method. Therefore, implement the following measures to prevent stress from being applied to the components.
  (Measures)
(1) Consider introducing a router type separator.
 
 If it is difficult to introduce a router type separator, implement the following measures.
(Refer to item 1. Mounting Position)
(2) Mount the components parallel to the board separation surface.
(3) When mounting components near the board separation point, add slits in the separation position
near the component.
(4) Keep the mounting position of the components away from the board separation point.
(2) Example of a Disc Separator
An outline of a disc separator is shown as follows. As shown in the Principle of Operation, the top
blade and bottom blade are aligned with the V-grooves on the printed circuit board to separate the board.
In the following case, board deflection stress will be applied and cause cracks in the capacitors.
(1) When the adjustment of the top and bottom blades are misaligned, such as deviating in the top-bottom,
left-right or front-rear directions
(2) The angle of the V groove is too low, depth of the V groove is too shallow, or the V groove is misaligned
top-bottom
IF V groove is too deep, it is possible to brake when you handle and carry it. Carefully design depth of the
V groove with consideration about strength of material of the printed circuit board.
[ Outline of Machine ]
[ Principle of Operation ]
[ Cross-section Diagram ]
[Disc Separator]
Top Blade
Top Blade
Top Blade
Top Blade
Bottom Blade
Bottom Blade
Bottom Blade
Bottom Blade
[V-groove Design]
Depth too Shallow
Depth too Deep
Example of
Recommended
V-groove Design
Not Recommended
Left-right Misalignment
Low-Angle
Recommended
Top-bottom Misalignment
Left-right Misalignment
Front-rear Misalignment
Caution
Recommended
Not recommended
Not recommended
Printed Circuit Board
Top Blade
V-groove
Bottom Blade
Top Blade
Printed Circuit Board
V-groove
!
Board Cropping Jig
V-groove
Printed Circuit Board
Printed circuit
board
Components
Load point
Direction of
load
Printed circuit
board
Component
s
Load point
Direction of load
JEMCGC-2701X
21




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