MIL-PRF-39005G
1.2.1.1 Style. The style is identified by the three letter symbol "RBR" followed by a two digit number;
the letters identify nonestablished reliability or established reliability, accurate, wire-wound, fixed resistors,
and the number identifies the size and power rating of the resistors.
1.2.1.2 Terminal. The terminal is identified by a single letter in accordance with table I.
TABLE I. Terminal.
Symbol
Terminal
L
Solderable
U
Weldable
1.2.1.3 Resistance. The nominal resistance is expressed in ohms and is identified by five digits; the
first four digits represent significant figures and the last digit specifies the number of zeros to follow.
When the values of resistance are less than 1,000 ohms, or when fractional values of an ohm are
required, the letter "R" is 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 II. Minimum and maximum resistance values are as specified (see 3.1).
The standard values for every decade are follow the sequence demonstrated for "10 to 100" decade in
table III. The resistance values for 0.01-percent (T), 0.02-percent (Q), 0.05-percent (A), and 0.1-percent
(B) resistance tolerances may be of any value within the limits of this specification, but it is preferred that
the values be chosen from the 192-series decade specified in table III.
TABLE II. Designation of resistance values.
Designation
Resistance value (ohms)
R1000 to R9880 inclusive
0.10 to
0.988 inclusive
1R000 to 9R880 inclusive
1.00 to
9.88 inclusive
10R00 to 98R80 inclusive
10.00 to
98.80 inclusive
100R0 to 988R0 inclusive
100.00 to
988.00 inclusive
10000 to 98800 inclusive
1,000
to
9,880
inclusive
10001 to 98801 inclusive
10,000
to
98,800
inclusive
10002 to 98802 inclusive
100,000
to
988,000
inclusive
10003 to 98803 inclusive
1,000,000
to 9,880,000
inclusive
2
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