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

T2004_T490 • 9/22/2016

88

Tantalum Surface Mount Capacitors – Standard Tantalum

Reverse Voltage

Solid tantalum capacitors are polar devices and may be permanently damaged or destroyed if connected with the wrong

polarity.Thepositiveterminalisidentifiedonthecapacitorbodybyastripeplusinsomecasesabevelededge.Asmall

degree of transient reverse voltage is permissible for short periods per the table. The capacitors should not be operated

continuously in reverse mode, even within these limits.

Temperature

Permissible Transient Reverse Voltage

25°C

15% of Rated Voltage

40°C

5% of Rated Voltage

85°C

1% of Rated Voltage

Table 2 – Land Dimensions/Courtyard

KEMET

Metric

Size

Code

Density Level A:

Maximum (Most) Land

Protrusion (mm)

Density Level B:

Median (Nominal) Land

Protrusion (mm)

Density Level C:

Minimum (Least) Land

Protrusion (mm)

Case

EIA

W

L

S

V1

V2

W

L

S

V1

V2

W

L

S

V1

V2

A

3216–18

1.35

2.20

0.62

6.02

2.80

1.23

1.80

0.82

4.92

2.30

1.13

1.42

0.98

4.06

2.04

B

3528–21

2.35

2.21

0.92

6.32

4.00

2.23

1.80

1.12

5.22

3.50

2.13

1.42

1.28

4.36

3.24

T

3528–12

2.35

2.20

0.92

6.32

4.00

2.23

1.80

1.12

5.22

3.50

2.13

1.42

1.28

4.36

3.24

Density Level A: For low-density product applications. Recommended for wave solder applications and provides a wider process window for reflow

solder processes.

Density Level B: For products with a moderate level of component density. Provides a robust solder attachment condition for reflow solder processes.

Density Level C: For high component desity product applications. Before adapting the minimum land pattern variations the user should perform

qualification testing based on the conditions outlined in IPC standard 7351 (IPC–7351).

1

Height of these chips may create problems in wave soldering.

2

Land pattern geometry is too small for silkscreen outline.

L

S

W

W

L

V1

V2

Grid Placement Courtyard