Conformal Coated Guide

www.vishay.com

Vishay Sprague

Revision: 01-Feb-2024

2

Document Number: 40150

For technical questions, contact: tantalum@vishay.com

THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT

ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000

SOLID ELECTROLYTE TANTALUM CAPACITORS

Solid electrolyte capacitors contain manganese dioxide,

which is formed on the tantalum pentoxide dielectric layer

by impregnating the pellet with a solution of manganous

nitrate. The pellet is then heated in an oven, and the

manganous nitrate is converted to manganese dioxide.

The pellet is next coated with graphite, followed by a layer

of metallic silver, which provides a conductive surface

between the pellet and the can in which it will be enclosed.

After assembly, the capacitors are tested and inspected to

assure long life and reliability. It offers excellent reliability

and high stability for consumer and commercial electronics

with the added feature of low cost.

Surface mount designs of “Solid Tantalum” capacitors use

lead frames or lead frameless designs as shown in the

accompanying drawings.

TANTALUM CAPACITORS FOR ALL DESIGN

CONSIDERATIONS

Solid electrolyte designs are the least expensive for a given

rating and are used in many applications where their very

small size for a given unit of capacitance is of importance.

They will typically withstand up to about 10 % of the rated

DC working voltage in a reverse direction. Also important

are their good low temperature performance characteristics

and freedom from corrosive electrolytes.

Vishay Sprague patented the original solid electrolyte

capacitors and was the first to market them in 1956. Vishay

Sprague has the broadest line of tantalum capacitors and

has continued its position of leadership in this field. Data

sheets covering the various types and styles of Vishay

Sprague capacitors for consumer and entertainment

electronics, industry, and military applications are available

where detailed performance

characteristics

must be

specified.

Note

• For all types of conformal coated capacitors, tantalum wire to

tantalum pellet attachment method could be either embedded

(see images on the left side of the page) or welded (see images

on the right side), depending on specific rating

TYPE 195D, 591D, 592D / 592W, 594D,

595D, 695D, T95, 14002

TYPE 597D / T97 / 13008

Encapsulation

Anode Termination

(Silver + Ni / Sn or

Ni / SnPb Plating)

Cathode Termination

(Silver + Ni / Sn or

Ni / SnPb Plating)

Sintered Tantalum Pellet

MnO

2 / Carbon /

Silver Coating

Sponge Teflon / Epoxy Tower

Encapsulation

Sponge Teflon / Epoxy Tower

Sintered Tantalum

Pellet

MnO

2 / Carbon /

Silver Coating

Silver Epoxy

Anode Termination

(Silver + Ni / Sn or

Ni / SnPb Plating)

Cathode Termination

(Silver + Ni / Sn or

Ni / SnPb Plating)

TYPE 194D

TYPE T96

TYPE T98

Encapsulation

SnPb or Gold Plated Ni Anode

End Cap Termination

Sponge Teflon

Anode Backfill

MnO

2 / Carbon /

Silver Coating

Sintered Tantalum

Pellet

Conductive Silver

Epoxy Adhesive

Cathode

Backfill

SnPb or Gold Plated Ni Cathode

End Cap Termination

Cathode Termination

(Silver + Ni / Sn or

Ni / SnPb Plating)

Encapsulation

Anode Termination

(Silver + Ni / Sn or

Ni / SnPb Plating)

Epoxy Tower /

Sponge Teflon

Sintered Tantalum

Pellet

MnO2 / Carbon /

Silver Coating

Intermediate

Cathode

Silver

Fuse

Cathode Termination

(Silver + Ni / Sn or

Ni / SnPb Plating)

Encapsulation

Anode Termination

(Silver + Ni / Sn or

Ni / SnPb Plating)

Epoxy Tower /

Sponge Teflon

Sintered Tantalum

Pellet

MnO

2 / Carbon /

Silver Coating

Intermediate

Cathode

Silver

Fuse

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