Nemco-electronics Part Numbering System Manuel d'utilisateur télécharger pdf

PCT Series

Example: PCT10/16CK

PCT 10 16 C K (optional)

TB Series

Example: TB10/35K1

TB 10 35 K 1 (optional) (optional)

Series Capacitance Voltage Tolerance Lead spacing LF TR = Tape & Reel Packaging

in microfarads code TA = Ammo Packaging

Part Numbering

Series Capacitance Voltage Case Size Tolerance

in microfarads

LSR Series

Example: LSR470/10HK100

LSR 470 10 H K 100 (optional)

Series Capacitance Voltage Case Size Tolerance Max ESR

in microfarads milliohms

MCT and CGT Series

Examples: MCT1/16RM7500 or CGT1/16RM7500

MCT or CGT 1 16 R M 7500

Series Capacitance Voltage Case Size Tolerance Max ESR

in microfarads milliohms

LF = lead free, RoHS compliant

Tolerances

M (+ 20%)

K (+ 10%)

J (+

5%) may be

available upon request,

contact the factory

Case Sizes

PCT / LSR MCT / CGT

A (3216-18) P (1005-07)

B (3528-21) R (1608-10)

C (6032-28)

D (7343-31)

H (7343-43)

Z (7361-37)

Low Profile

XL (2012-12)

AL (3216-12)

BL (3528-12)

CL (6032-15)

DL (7343-20)

Lead Spacing

Codes

1 ( 0.1 inches )

2 ( 0.2 inches )

250 ( 0.25 inches )

E1 ( 0.1 snap in )

E2 ( 0.2 snap in )

F ( 0.1 inches )

Voltages

PCT MCT

LSR CGT TB

4 2 6 (6.3)

6 (6.3) 3 10

10 4 16

16 5 20

20 6 (6.3) 25

25 10 35

35 16 50

50 25

Standard packaging is tape and reel, 7” diameter reel. (For 13” dia. reel please contact the factory for ordering information)

Only available in M tolerance.

Only available lead-free, RoHS compliant.

Standard packaging is tape and reel, 4” diameter reel. (For 7” dia. reel please contact the factory for ordering information)

All Nemco products are manufactured lead-free and RoHS compliant.

The use of the “LF” suffix code is optional when customers choose to establish a unique part number.

(forward slash)

Standard packaging is bulk.

Catalog data relates to an ambient temperature of +25°C measured at 125 Hz, 0.5V RMS unless otherwise specified.

Substitutions of higher voltage ratings, lower ESR values, tighter capacitance tolerances and higher temperature rated devices

will increase performance and reliability.

Advantages of tantalum capacitors are:

• High volumetric efficiency.

• Stable electrical performance over temperature (T.C. 12%).

• Operating temperature range –55°C to +125°C, 2/3 Vr (linear derating) above +85°C, CGT series is derated above +40°C.

• Better frequency characteristics than aluminum electrolytics.

• Self-Healing, no wear out mechanism. No degradation in performance or reliability.

• No limitation on shelf life.

Surge voltages may be applied up to ten times in an hour for periods up to 30 seconds at a time. They are not intended for

continuous operation and should not be used as a parameter for design. See table below.

Voltage derating improves the operating reliability of a tantalum capacitor. Select a higher voltage rated part (30% to 70%)

than the maximum line voltage. In the case of low impedance circuits, the tantalum capacitor is likely to be stressed by current

surges. In circuits which undergo rapid charge/discharge, a protective resistor of 1.0 ohm per applied volt is recommended. If

this is impossible, a voltage-derating factor of up to 70% is recommended. A combination of tantalum capacitors can be

connected in series to increase working voltage of the equivalent capacitor. In many power supply topologies where the di/dt

through the capacitor is limited, such as most implementations of buck (current mode), forward converter and flyback, the

requirement for series resistance is decreased to 0.1 ohm per applied volt. This level of resistance is used as a basis for the series

resistance variable in a 1%/1000 hours 60% confidence level reference. This is what steady state life tests are based on. Certain

test circuits such as ICT are likely to subject the capacitor to large voltage and current transients, which will not be seen in

normal use. This should be taken into account when considering the capacitors rated voltage.

A small amount of reverse voltage is permissible for short periods. It is not intended to cover continuous operation.

Maximum reverse voltages are:

+25°C 10% of rated voltage not exceeding 1.0 volt

+85°C 3% of rated voltage not exceeding 0.5 volt

+125°C 1% of rated voltage not exceeding 0.1 volt

Tantalum capacitors are polar devices. A non-polar effect can be created by connecting two devices, arranged back-to-back (-

to -). The capacitance value of each part should be twice the required capacitance value, equal tolerance and rated voltage. For

example, two PCT10/35DK devices connected in a back-to-back configuration would result in a non-polar 5ufd, 35volt device.

In DC-DC converters, the input side is typically fed from voltage sources, which are not regulated and are of nominally low imped-

ance. This type of application severely stresses the capacitor. A higher than normal failure rate level may be experienced.

Maximum voltage derating and use of low ESR devices is recommended.

Higher capacitances and even lower ESR

Values can be achieved by connecting tantalum capacitors in parallel.

Electrostatic Discharge

Tantalum capacitors demonstrate no sensitivity to ESD.

Flammability UL Rating UL94 VO, Oxygen Index 35%. Epoxy, Hysol MG 33.

Tips for Design and Use

Rated Derated

Working Surge DC Surge

Voltage Voltage Voltage Voltage

+85°C +85°C +125°C +125°C

2 2.7 1.3 1.7

3 3.9 2.0 2.6

4 5.2 2.7 3.2

5 6.5 3.3 4.0

6845

10 13 7 8

16 20 10 12

20 26 13 16

25 32 17 20

35 46 23 28

50 65 33 40

Résumé du contenu

Page 1 - Tips for Design and Use

PCT SeriesExample: PCT10/16CKPCT 10 16 C K (optional)TB SeriesExample: TB10/35K1TB 10 35 K 1 (optional) (optional)Series Capacitance Voltage Tolerance

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Nemco-electronics Part Numbering System Manuel d'utilisateur

Naviguer en ligne ou télécharger Manuel d'utilisateur pour Équipement Nemco-electronics Part Numbering System. Nemco Electronics Part Numbering System User Manual Manuel d'utilisatio

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