© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 (864) 963-6300 • www.kemet.com

F3082_LDB • 5/20/2015

8

Surface Mount Metallized PPS Film Capacitors

LDB Series Unencapsulated Stacked Chip, Size 1206 – 1812, 16 and 50 VDC

Flux/Cleaning/Storage and Moisture cont'd

Storage and moisture recommendations

KEMET SMD Film Capacitors are supplied in a MBB (Moisture Barrier Bag) Class 1. We can guarantee a 24 months shelf life

(temperature≤40°C/relativehumidity≤90%).AftertheMBBhasbeenopened,componentsmaystayinareaswithcontrolled

temperatureandhumidity(temperature≤30°C/relativehumidity≤60%)for168hours[MSL3](ratedvoltage≤100VDC)or696hours

[MSL2a](ratedvoltage>100VDC).Forlongerperiodsoftimeand/orhighertemperatureand/orhigherrelativehumidityvalues,it

is absolutely necessary to protect the components against humidity. If the reel inside the MBB is partially used, KEMET recommends

to re-use the same MBB or to avoid areas without controlled temperature and humidity (see above). If the above conditions are not

respected,componentsrequireabaking(minimumtime:48hoursat55±5°C)beforethereflow.

Manual assembly recommendations

If PCBs are assembled manually, care must be taken to avoid any mechanical damage to the

components. Our recommendations are the following (see Fig. 1):

1. When using tweezers, the components should be gripped across the two terminations (A);

2. Avoid any contact with the two cutting surfaces (C);

3. A vacuum pen is recommended on the top and bottom surfaces (B).

Manual soldering recommendations

LDEandLDBserieshavebeendesignedforSurfaceMountTechnology,pick&placemachinesandreflowsolderingsystems.Usinga

manual soldering iron, issues may occur because the typical temperature for manual soldering is around 350°C. Therefore please pay

careful attention:

• Never touch the capacitor body with the soldering iron but rather touch the soldering iron and the end termination with the tin wire

edge (see Fig. 2);

• If the soldering iron is equipped with a temperature controller device:

Set the temperature to 250 ± 3°C and proceed as per Fig. 2 (the maximum soldering time, on both terminations, is 5 seconds);

• If the soldering iron is NOT equipped with a temperature controller device:

This is the worst situation. The following are a few practical suggestions but, clearly, the operator’s experience is extremely important:

1. Proceed as per Fig. 2;

2. As soon as the tin wire starts melting, move the soldering iron away as quickly as possible;

3. Wait a few seconds and check that the soldering joint has been properly created;

• Ifthesolderingironisequippedwithahotairflowdevice:

Set the hot air temperature to 250 ± 3°C and do not send the hot air directly onto the capacitor plastic body. In this situation, the

operator’s experience is very important;

• In any case, avoid mass-mounting SMD Film Capacitors manually.