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Tantalum Capacitor Series

Type of Tantalum Capacitor:

A. TCS
Tantalum electrolytic capacitors surface mount type
B. TCD
Tantalum electrolytic capacitors resin dipped
C. TCA
Metal case tantalum capacitors

 

 

 

 

 

 

 

 

 

 

General Information

1. Direct DC voltage

The rated voltage(UR), indicated on the capacitor, is the maximum DC voltage which can be applied continuously between -55°C and +85°C

2. Reverse voltage

This characteristic is not guaranteed for all types.

Maximum reverse voltage is generally:
0.15 times UR at +20°C
0.05 times UR at +85°C
0.01 times UR a t +125°C

Tests are performed with the following conditions:
125 hours under reverse voltage followed by 125 hours under direct voltage.

3. Leakage current

Leakage current is the residual current which flows through the capacitor after the charging time, under rated voltage. It is measured after a time not exceeding 5 minutes and is given in µA.

It is equivalent to the insulation resistance to the capacitor and it must be as low as possible.

Maximum leakage current is a function of capacitance and rated voltage values and is given, for each type, in the data sheets.

At 20°C, THE LIMIT IS GENERALLY:
If max (µA)=0.01xCRxUR
With CR in µF and UR in V.

4. Dissipation factor

Dissipation factor is generally measured at the same time as the capacitance, with the same conditions. It is a
function of the series resistance of the capacitor and the capacitance at low frequency.
DF=ESR x C x 2πf

At low frequency, the series resistance is the sum of an ohm part (leads, contacts, MnO2..) and the dielectric losses. Dissipation factor is given in % and maximum limits are given for each type in the data sheets.

5. Equivalent series resistance or impedance

Equivalent circuit of a capacitor

R: equivalent series resistance of the capacitor (leads, contacts, MnO2, dielectric losses)
L: inductance mainly due to the leads
C: capacitance

Equivalent Series Resistance for TCA types
For these types which are specially designed to e used in power supplies and converters, a maximum ESR is given at a frequency of 100kHz or 500kHz. Parameters such output ripple voltage and ripple current capability are directly a function of the ESR value.

Impedance (for standard products)
For the others types, a maximum limit is given for the impedance.
The formula for impedance is:
Z=√(R2+(Lω-1/Cω)2)
Examples of impedance curves vs frequency are given in the following:
It can be seen that:
At low frequencies, impedance is a function of capacitance
At high frequencies, impedance is a function of inductance
At medium frequencies it is a function of the ESR
Maximum impedance: see data sheets.

6. Maximum ripple current & voltage

The maximum value of the ripple current , or ripple voltage which can be applied to the capacitor is only limited by the thermal effect. Indeed, as the electrolyte is in this case a solid semi-conductor, there is no damage and physical change in the structure when a ripple current is flowing through it.

On the other hand, as the series resistance is not zero, there will be a heating which is proportional to the ESR and to the square of ripple current (P=ESR x Irms2)

Coefficient to apply to the maximum ripple current vs temperature: See curve below

 

Typical Graph

(A) Characteristics reference

For the types which can be used up to 125°C, the voltage must be derated between 85°C and +125°C according to the following curve.

(B) Leakage current change vs applied voltage: see curve below

(C) Leakage current change vs temperature: see curve below

As the ESR changes in frequency, maximum ripple currents are given for two frequencies (1kHz and 100kHz). For other frequencies, apply the rule given by the curve below.

(D) Dissipation factor change vs temperature: see curve below

(E) Dissipation factor change vs Frequency: see curve below

(F) ESR change vs frequency: see table below

(G) ESR change vs frequency: see table below

As there is heating due to the ripple current, it is also necessary to derate the maximum ripple current when the room temperature is higher than 20°C.

 

Tapping & Packing (Surface Mount)

1. TCS type

Dimensions of the carrier tape and standard parts quantity per reel

Case Size
A±0.1
B±0.1
C±0.1
D±0.1
E±0.1
F±0.1
G±0.1
H±0.1
J+0.1 -0
KMAX
t
Quantity Per
A
1.9
3.5
8.0
3.5
1.75
4.0
2.0
4.0
1.5
2.5
0.2
2000
B
3.3
3.9
8.0
3.5
1.75
4.0
2.0
4.0
1.5
2.5
0.2
2000
C
3.7
6.0
12.0
5.5
1.75
8.0
2.0
4.0
1.5
3.0
0.3
500
D
4.8
7.7
12.0
5.5
1.75
8.0
2.0
4.0
1.5
3.4
0.3
500

Inserting direction (Polarity orientation)

Polarity L: To be inserted with
Polarity R: To be inserted with

Reel dimensions

 

Tape width
8
12
A+0-3
Ф180
Ф180
B+1-0
Ф60
Ф60
C±0.2
Ф13
Ф13
D±0.8
Ф21
Ф21
E±0.5
2.0
2.0
W±0.3
9.0
13.0
t±0.4
1.3
1.3
R±0.4
10.5
10.5

2. TCD type

I. The capacity of the plastic bags depends on:

Case Size
Cut Dimension
Quantity Per Bag
From A to D
From E to K
From L to N
Case Size Format 1
Cut <7mm
1000
1000
500
Case Size Format 2
Cut ≥14mm
1000
500
250
Case Size Format 2
-
1000
500
250

II. TAPE & AMMO PACKING (conform to : IEC286-2)

Radial Tape & Ammo Packing (conform to: IEC286-2)

Format 1
Format 2

Item
Code
Dimension (mm)
Carrier tape width
W
18.0±1.5
Hold down tape width
W1
6.0±0.5
Feed hole diameter
W2
1.0 max
Feed hole pitch
D
4.0±0.2
Hole center to lead
P
12.7±0.3
Hole center to component
P1
Format 1: 5.05±0.7
Format 2: 3.85±0.7
Lead wire clench height
P
6.35±1.0
Hole position
H
16.5±0.5
Base of component height
H1
9.0±0.5
Component height
H2
0.8 min
Component height
H3
32.2 max
Component alignment
P
0±1.3
h
0±2.0
Lead spacing
S
'S' wires: 2.5±0.6 0.1
'B' wires: 2.5±0.6 0.5
Lead diameter
d
0.5±0.05
Length of snipped lead
L
11.0 max
Carrier tape thickness
T
0.5±0.1

Case Code
A~E
F~J
K~N
QTY. (PCS/box)
2500
2000
1000

 

Tantalum Electrolytic Capacitors Part Number System

1. Series

Code
Description
TCS
Tantalum electrolytic capacitors surface mount type
TCD
Tantalum electrolytic capacitors resin dipped
TCA
Metal case tantalum capacitors

2. Rated Capacitance

Code
101
102
103
104
105
106
0107
0108
PF
100PF
1000PF
10000PF
100000PF
1000000PF
-
-
-
NF
-
1NF
10NF
100NF
1000NF
-
-
-
µF
-
0.001µF
0.01µF
0.1µF
1.0µF
10µF
100µF
1000µF

3. Tolerance

Tolerance
±10%
±20%
Symbols
K
M

4. Rated Voltage

Voltage
4V
6.3V
10V
16V
20V
25V
35V
40V
50V
63V
100V
125V
Symbols
004
006
010
016
020
025
035
040
050
063
100
125

5. Dimensions

TCS Size
Code
A
B
C
D
W±0.2
3.2
3.5
6.0
7.3
H±0.2
1.6
1.9
2.5
2.8
T±0.3
1.6
2.8
3.2
4.3
S±0.3
0.8
0.8
1.3
1.3
W2±0.1
1.2
2.2
2.2
2.4

TCD Size
Code
A
B
C
D
E
F
H
6.0
7.2
8.0
9.4
11.5
12.5
W
4.0
4.8
5.5
6.0
7.2
8.2
T
3.8
4.6
5.3
5.8
7.0
8.0

TCA Size
Code
A
B
C
D
E
F
DxL
5x14
6x16
8x16
8x22
10x22
10x25
d 0.05
0.8
0.8
0.8
0.8
0.8
0.8

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