ARMY - MIL-R-39017E
RESISTORS, FIXED, FILM (INSULATED), NONESTABLISHED RELIABILITY, AND ESTABLISHED RELIABILITY, GENERAL SPECIFICATION FOR
|Publication Date:||19 March 1991|
This specification covers the general requirements for insulated, film, fixed resistors of 1, 2, 5, and 10 percent resistance tolerance. These resistors are capable of full-load operation at an ambient temperature of 70°C and have a resistance-temperatu
The PIN shall be in the following form, and as specified (see 3.1).
The style is identified by the three-letter symbol RLR followed by a two-digit number; the letters identify established reliability, insulated, film, fixed resistors, and the number identifies the size and power rating of the resistors. Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to U.S. Army Laboratory Command, ATTN: SLCET-R-S, Fort Monmouth, NJ 07703-5000 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter.
The terminals are identified by a single letter in accordance with table I. TABLE I. Terminal.
The resistance tolerance is identified by a single letter in accordance with table II. TABLE II. Resistance tolerance.
Symbol Resistance tolerance
The life failure rate level designation as shown in table III is signified by a single letter (M, P, R, or S), which identifies the life failure rate level for which the resistor is qualified (see 4.4). TABLE III. Life failure rate level (established at 60-percent confidence).
Failure rate level Failure rate level
designation (%/1,000 hr)
The nominal resistance expressed in ohms is identified by a resistance designation utilizing four digits. Minimum and maximum resistance values shall be as specified (see 3.1).
The four digit resistance designation is applicable to resistance tolerances "F" (1.0 percent), "G" (2.0 percent), "J" (5.0 percent), and "K" (10.0 percent). The nominal resistance 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" shall 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 IV. Standard values for every decade shall follow the sequence demonstrated for 10 to 100 decade in table V. Resistance values not listed in table V for the appropriate resistance tolerance shall be considered as not conforming to the specification. Although resistance tolerances "G", "J", and "K" normally requires less than three significant figures to adequately describe the true resistance value, for the purpose of this specification, the nominal value shall be three significant figures followed by the fourth digit to signify the number of zeros to follow.
TABLE IV. Designation of resistance values for resistance-tolerance
Designation Resistance ohms
These film resistors described herein are intended to be used in electronic circuits where semiprecision characteristics and small sizes are required.