T491D685M035AT7280 Kemet, T491D685M035AT7280 Datasheet - Page 16

• Manufacturer Part Number: T491D685M035AT7280
• Manufacturer: Kemet

Standard MnO
Soldering Process
KEMET’s families of surface mount capacitors are compatible
with wave (single or dual), convection, IR or vapor phase reflow
techniques. Preheating of these components is recommended
to avoid extreme thermal stress. KEMET's recommended
profile conditions for convection and IR reflow reflect the
profile conditions of the IPC/J-STD-020D standard for moisture
sensitivity testing. The devices can safely withstand a maximum
of three reflow passes at these conditions.
Note that although the X/7343-43 case size can withstand wave
soldering, the tall profile (4.3 mm maximum) dictates care in wave
process development.
Hand soldering should be performed with care due to the difficulty
in process control. If performed, care should be taken to avoid
contact of the soldering iron to the molded case. The iron should
be used to heat the solder pad, applying solder between the pad
and the termination, until reflow occurs. Once reflow occurs, the
iron should be removed immediately. "Wiping" the edges of a chip
and heating the top surface is not recommended.
During typical reflow operations, a slight darkening of the gold-
colored epoxy may be observed. This slight darkening is normal
and is not harmful to the product. Marking permanency is not
affected by this change.
Construction
© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 [phone] • www.kemet.com
Silver Paint
Leadframe
(-Cathode)
2
Tantalum Surface Mount Capacitors – T491 Industrial Grade MnO
MNO
2
Carbon
/Ta
2
O
5
/Ta
Tantalum Wire
Silver Adhesive
Weld
2
Series
Note: All temperatures refer to the center of the package, measured on the
package body surface that is facing up during assembly reflow.
*Case Size D, E, P, Y and X
**Case Size A, B, C, H, I, K, M, R, S, T, U, V, W and Z
Washer
Time 25°C to Peak Temperature
Leadframe
(+Anode)
Time within 5°C of Max Peak
Liquidous Temperature (T
Ramp-down Rate (T
Time (t
Time Above Liquidous (t
Temperature Max (T
Ramp-up Rate (T
Profile Feature
Temperature Min (T
Peak Temperature (T
T
T
25
Preheat/Soak
smax
smin
Temperature (t
T
T
s
) from T
P
L
smin
L
to T
Max Ramp Up Rate = 3 ° C/sec
Max Ramp Down Rate = 6 ° C/sec
to T
P
P
)
Smin
Smax
to T
smax
P
P
)
)
)
)
L
)
L
)
L
)
)
SnPb Assembly
25° C to Peak
t
S
6 minutes max
3°C/sec max
6°C/sec max
60–150 sec
60–120 sec
20 sec max
235°C**
220°C*
100°C
150°C
183°C
Time
T2005_T491 • 9/6/2011
Pb-Free Assembly
t
L
8 minutes max
3°C/sec max
6°C/sec max
t
60–120 sec
60–150 sec
30 sec max
P
260°C**
250°C*
150°C
200°C
217°C
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