GRM552B11H102KA01D datasheet(213/221 Pages) MURATA

213 / 221 page

The top of the solder fillet should be lower than the

thickness of components. If the solder amount is

excessively large, the risk of cracking is higher during

board bending or under any other stressful conditions.

Continued from the preceding page.

Optimum Solder Amount for Flow Soldering

5. Flow Soldering

When components are exposed to sudden heat, their

mechanical strength can be decreased due to the

extreme temperature changes which can cause flexing

and result in internal mechanical damage, which will

cause the parts to fail. Additionally, an excessively long

soldering time or high soldering temperature results in

leaching by the outer electrodes, causing poor adhesion

or a reduction in capacitance value due to loss of contact

between electrodes and end termination.

In order to prevent mechanical damage, preheating is

required for both the components and the PCB board.

Preheating conditions are shown in Table 2. It is required

to keep temperature differential between the soldering

and the components surface (

∆T) as small as possible.

When components are immersed in solvent after

mounting, be sure to maintain the temperature difference

between the component and solvent within the range

shown in Table 2.

Do not apply flow soldering to chips not listed in Table 2.

--18/21/31

∆TV150D

Part Number

Temperature Differential

Table 2

[Standard Conditions for Flow Soldering]

[Allowable Soldering Temperature and Time]

In the case of repeated soldering, the accumulated

soldering time must be within the range shown above.

,,,

Soldering Time (sec.)

260

270

250

240

230

010

Up to Chip Thickness

Adhesive

Recommended Conditions

Peak Temperature

Atmosphere

Pb-Sn Solder

240-250

°C

Air

Lead Free Solder

250-260

°C

60-120 seconds

5 seconds max.

∆T

Gradual

Cooling

Soldering

Preheating

170

°C

150

°C

130

°C

Time

Temperature (

Peak Temperature

,,,

Pb-Sn Solder: Sn-37Pb

Lead Free Solder: Sn-3.0Ag-0.5Cu

Continued on the following page.

in section

!Caution

212

!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 because there is no space for detailed specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.

• This PDF catalog is downloaded from the website of Murata Manufacturing co., ltd. Therefore, it’s specifications are subject to change or our products in it may be discontinued without advance notice. Please check with our

sales representatives or product engineers before ordering.

• This PDF catalog has only typical specifications because there is no space for detailed specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.

!Note

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10.12.20

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