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MIL-PRF-914 Resistor Networks, Fixed, Film, Surface Mount, Nonestablished Reliability, And Established Reliability, General Specification ForThis specification covers the general requirements for nonestablished reliability \(non-ER\) and established reliability \(ER\), hermetically sealed \(see 3.27\) and nonhermetically sealed networks \(see 3.27.1\). These networks consist entirely of fixed, film resistors. They are primarily intended for use in surface mount applications where space is a major concern. ER resistors covered by this specification will have life failure rates \(FR\) ranging from 1 percent to 0.001 percent per 1,000 hours \(see 1.2.1.7\). The ER FR are established at a minimum 60-percent confidence level on the basis of life tests. Designers are CAUTIONED on using these resistors in pulse applications \(see 6.4.4\).

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MIL-PRF-914C
TABLE II. Termination.
Material 1/
Termination area
Code letter
Type
Leadless configuration A
A
Leadless configuration B
B
Gold
Leaded
C
Leadless configuration C
Z
Leadless configuration A 3/
D
Leadless configuration B 3/
E
Tin-lead 2/
Solderable
Leaded
F
Leadless configuration C 3/
W
Leadless configuration A 3/
G
Leadless configuration B 3/
H
Hot solder dip 2/ 4/
Leaded
J
Leadless configuration C 3/
T
1/  Base metals will be as specified in MIL-STD-1276.
3/  A nickel barrier will be placed between base metal and lead finish with a minimum
thickness of 50 microinches.
4/  Type 52 of MIL-STD-1276, maximum thickness of 200 microinches, is not
applicable.
1.2.1.3 Resistance. The four digit resistance designation is applicable to all resistance tolerances. The nominal
resistance is identified by four digits; the first three digits represent significant figures and the last digit specifies the
number of zeros to follow. When the value of resistance is less than 100 ohms, or when fractional values of an ohm
are required, the letter "R" will be substituted for one of the significant digits to represent the decimal point. When the
letter "R" is used, succeeding digits of the group represent significant figures. The resistance value designations are
shown in table III. Standard values for every decade will follow the sequence demonstrated for the "10 to 100"
decade in table IV. The resistance values for tolerance B may be of any value within the limits specified in 3.1, but it
is preferred that values be chosen from the "D" column of table IV. Only those resistance values that follow the
sequence of values listed in table IV will be considered as conforming to this specification.
1.2.1.3.1 Resistance designation for network schematics J and S. For network schematics J and S, the four digit
resistance designation becomes a code indicator with the first digit being an "A" and the following three digits a code
number indicating a resistance combination described in the applicable associated specification (see 3.1).
TABLE III. Designation of resistance values.
Designation
Resistance (ohms)
10R0
to
98R8 inclusive
10
to
98.8 inclusive
1000
to
9880 inclusive
100
to
988  inclusive
1001
to
9881 inclusive
1,000
to
9,880  inclusive
1002
to
9882 inclusive
10,000
to
98,800  inclusive
1003
to
9883 inclusive
100,000
to
988,000  inclusive
1004
to
9884 inclusive
1,000,000
to
9,880,000  inclusive
3



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