Spec No. JEFL243C-0023H-01 P 7/10
MURATA MFG CO.,LTD.
Reference Only
13.2 Limitation of Applications
Please contact us before using our products for the applications listed below which require especially high
reliability for the prevention of defects which might directly cause damage to the third party’s life,body or property.
(1)Aircraft equipment (2)Aerospace equipment (3)Undersea equipment (4)Power plant control equipment
(5)Medical equipment (6)Transportation equipment(automobiles, trains, ships, etc.) (7)Traffic signal equipment
(8)Disaster prevention / crime prevention equipment (9)Data-processing equipment
(10)Applications of similar complexity or with reliability requirements comparable to the applications listed in the above
14. Notice
Products can only be soldered with reflow.
This product is designed for solder mounting.
Please consult us in advance for applying other mounting method such as conductive adhesive.
14.1 Flux and Solder
Flux
Use rosin-based flux,(with converting chlorine content 0.06 to 0.1(wt)%. ),
but not highly acidic flux
(with Halogen content exceeding 0.2(wt)% conversion to chlorine).
Do not use water-soluble flux.
Solder Use Sn-3.0Ag-0.5Cu solder
14.2 Assembling
< Exclusive use of Reflow soldering >
Flow soldering may cause deterioration in insulation resistance.
So,reflow soldering shall be applied for this product.
< Thermal Shock >
Pre-heating should be in such a way that the temperature difference between solder and
ceramic surface is limited to 100°C max. Also cooling into solvent after soldering
should be in such a way that the temperature difference is limited to 100°C max.
Not enough preheating may cause deterioration in insulation resistance and / or crank or ceramic body.
14.3 Cleaning Conditions
Do not clean after soldering. If cleaning, please contact us.
14.4 Resin coating
The impedance value may change due to high cure-stress of resin to be used for coating/molding products. An
open circuit issue may occur by mechanical stress caused by the resin, amount/cured shape of resin, or
operating condition etc. Some resin contains some impurities or chloride possible to generate chlorine by
hydrolysis under some operating condition may cause corrosion of wire of coil, leading to open circuit. So,
please pay your careful attention when you select resin in case of coating/molding the products with the resin.
Prior to use the coating resin, please make sure no reliability issue is observed by evaluating products mounted
on your board.
14.5 Attention regarding P.C.B. bending
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 location the sideways
direction (Length:a
<b) 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
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Poor example
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Good example
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b
a
