
© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 • 864-963-6300 • www.kemet.com C1020_X7R_KPS_SMD • 6/8/2018 99
Surface Mount Multilayer Ceramic Chip Capacitors (SMD MLCCs)
KPS Series, X7R Dielectric, 10 – 250 VDC (Commercial Grade)
Table 3 – KPS Land Pattern Design Recommendations (mm)
EIA SIZE
CODE
METRIC
SIZE
CODE
Median (Nominal) Land
Protrusion
1210 3225 1.50 1.14 1.75 5.05 3.40
1812 4532 2.20 1.35 2.87 6.70 4.50
2220 5650 2.69 2.08 4.78 7.70 6.00
Image at right based on an EIA 1210 case size.
Soldering Process
KEMET’s KPS Series devices are compatible with IR
reow techniques. Preheating of these components is
recommended to avoid extreme thermal stress. KEMET's
recommended prole conditions for IR reow reect the
prole conditions of the IPC/J–STD–020D standard for
moisture sensitivity testing.
To prevent degradation of temperature cycling capability,
care must be taken to prevent solder from owing into
the inner side of the lead frames (inner side of "J" lead in
contact with the circuit board).
After soldering, the capacitors should be air cooled to
room temperature before further processing. Forced air
cooling is not recommended.
Hand soldering should be performed with care due to the
diculty in process control. If performed, care should be
taken to avoid contact of the soldering iron to the capacitor
body. The iron should be used to heat the solder pad,
applying solder between the pad and the lead, until reow
occurs. Once reow occurs, the iron should be removed
immediately. (Preheating is required when hand soldering to
avoid thermal shock.)
Prole Feature SnPb Assembly Pb-Free Assembly
Temperature Minimum (TSmin)100°C 150°C
Temperature Maximum (TSmax
150°C 200°C
Time (ts) from Tsmin to Tsmax) 60 – 120 seconds 60 – 120 seconds
Ramp-up Rate (TL to TP)3°C/seconds maximum 3°C/seconds maximum
Liquidous Temperature (TL)183°C 217°C
Time Above Liquidous (tL) 60 – 150 seconds 60 – 150 seconds
Peak Temperature (TP)235°C 250°C
Time within 5°C of Maximum
Peak Temperature (tP)
20 seconds maximum 10 seconds maximum
Ramp-down Rate (TP to TL)6°C/seconds maximum 6°C/seconds maximum
Time 25°C to Peak
Temperature
6 minutes maximum 8 minutes maximum
Note: All temperatures refer to the center of the package, measured on the
package body surface that is facing up during assembly reow.
Time
Temperature
Tsmin
25
Tsmax
TL
TPMaximum Ramp Up Rate = 3°C/second
Maximum Ramp Down Rate = 6°C/second
tP
tL
ts
25°C to Peak
Y
C C
X X V2
Grid Placement Courtyard
Y
V1