MIL-PRF-55365 Capacitor, Fixed, Electrolytic \(Tantalum\), Chip, Established Reliability, Nonestablished Reliability, And High Reliability, General Specification ForThis specification covers the general requirements for non-established reliability \(non-ER\), established reliability \(ER\), and high reliability tantalum dielectric, fixed chip capacitors, primarily intended for use in thick and thin film hybrid circuits or surface mount applications for filter, bypass, coupling, and other applications where the alternating current \(ac\) component is small compared to the direct current \(dc\) rated voltage and where supplemental moisture protection is available \(see 6.1\). The established reliability capacitors have reliability ratings established on the basis of life tests performed at specified voltage at +85??C for failure rate levels \(FRL\) ranging from: a. 1.0 percent per 1,000 hours to 0.001 percent per 1,000 hours in accordance with MIL-STD-690. These FRL?╞s are established at a 60-percent confidence level and are maintained at a 10-percent producer?╞s risk \(exponential distribution\). b. 0.1 percent per 1,000 hours to 0.001 percent per 1,000 hours or 1 FIT \(FIT = failure unit = one failure per 109 device hours\) at 90-percent confidence level \(Weibull distribution\).

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MIL-PRF-55365H

3.26.3 Substitution of capacitance tolerance and rated voltage. Parts qualified and marked to tighter capacitance

tolerance or higher rated voltage, with acquiring agency approval, are substitutable for parts marked to looser

capacitance or lower rated voltage, provided all other values, such as case size, characteristic, and terminations

remain the same. Unless otherwise specified in the contract or order (see 6.2), the substitutable parts shall not be

remarked. In the event the capacitance tolerances or rated voltages are remarked, the lot date codes on the parts

shall not be changed and the workmanship criteria shall be met.

3.27 Termination finish code substitutability. Termination finish codes may be substituted for other termination

finish codes, with initial acquiring agency or company approval, in the following manner:

Termination finish code

May be substituted for termination finish code

C,K

C,H

3.28 Surge current code substitutability. Surge current codes may be substituted for other surge current codes,

with initial acquiring agency or company approval, in the following manner:

Surge current code

May be substituted for surge current code

A, B, Z (or no code)

A, Z (or no code)

Z (or no code)

3.29 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or environmentally

preferable materials should be used to the maximum extent possible provided that the material meets or exceeds the

operational and maintenance requirements, and promotes economically advantageous life cycle costs.

3.30 Workmanship. Capacitors shall be processed in such a manner that, when examined under 10X

magnification, they shall be uniform in quality and shall be free from pits, cracks, rough edges, and other defects that

will affect life, serviceability, or function. The capacitors shall exhibit no de-metallization (lift-off) on the terminations.

3.30.1 Soldering. All excess flux or solder shall be removed. Electrical connections shall be electrically

continuous after soldering.