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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?â•žs are established at a 60-percent confidence level and are maintained at a 10-percent producer?â•žs 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
b. For specification sheets 11 and higher (PIN format includes case code):
CWR19
B
C
225
J
B
B
B
Style
Voltage
Termination Capacitance Capacitance
Product
Case code
Surge
finish
tolerance
level
current
designator
option
1.2.1.1 Style. The style is identified by the three-letter symbol "CWR", followed by the two digit number. The
letters identify tantalum chip capacitors. The number identifies the design of the capacitor.
1.2.1.2 Voltage. The voltage (rated, derated, and surge) is identified by a single letter as shown in table I.
TABLE I. Voltage.
Voltage (volts, DC)
Symbol
Rated (+85°C)
Derated (+125°C)
Surge (+85°C)
A
2
1.3
2.7
B
3
2.0
4.0
C
4
2.7
5.3
D
6
4.0
8.0
E
8
5.3
10.7
F
10
6.7
13.3
G
12
8.0
16.0
H
15
10.0
20.0
J
20
13.3
26.7
K
25
16.7
33.3
L
30
20.0
40.0
M
35
23.3
46.7
N
50
33.3
66.7
1.2.1.3 Termination finish. The termination finish is identified by a single letter as follows:
B - Gold plated (50 microinch minimum).
C - Hot solder dipped (60 microinch minimum).
H - Solder plated (100 microinch minimum).
K - Solder fused (60 microinch minimum).
At the option of the manufacturer, all termination finishes may have a barrier metal. See 6.8 for conversion from
previous termination finishes.
1.2.1.4 Capacitance. The nominal capacitance value, expressed in picofarads (pF), is identified by a three-digit
number. The first two digits represent significant figures and the third digit specifies the number of zeros to follow.
1.2.1.5 Capacitance tolerance. The capacitance tolerance is identified by a single letter as shown in table II.
TABLE II. Capacitance tolerance.
Symbol
Capacitance tolerance
± 5 percent
J
± 10 percent
K
± 20 percent
M
2



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