scope:

This specification covers the general requirements for high-stability, film, fixed resistors of ±0.10, ±0.25, ±0.50, and ±1.00 percent resistance tolerances, which are relatively stable with respect to time, temperature, and humidity.

The PIN shall be in the following form (see 3.1):

The style is identified by the two-letter symbol "RN" followed by a two digit number; the letters identify high-stability, film, fixed resistors, and the number identifies the size of the resistors (see 3.1).

The characteristic is identified by a single letter in accordance with table I.

The nominal resistance expressed in ohms 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" 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 II. Minimum and maximum resistance values shall be as specified (see 3.1). The standard values for every decade shall follow the sequence demonstrated for the "10 to 100" decade in table III. Although resistance tolerances B and C (see 1.2.1.4) normally require more 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. The resistance values for 0.10 percent resistance tolerance (B) may be of any value, but it is preferred that the values be chosen from the 192-value series decade specified for resistance tolerances C and D. Resistance values not listed in table III for tolerances F and D shall be considered as not conforming to the specification. 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 Research Laboratory, ATTN: AMSRL-EP-RD, Fort Monmouth, NJ 07703-5601 by using the self addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. TABLE II. Designation of resistance values.

Designation Resistance ---------------------------------------------- 1R00 to 98R8 10 to 98.8 ohms included 1000 to 9880 100 to 988 ohms included 1001 to 9881 1 to 9.88 kilohms included 1002 to 9882 10 to 98.8 kilohms included 1003 to 9883 100 to 988 kilohms included 1004 to 9884 1 to 9.88 megohms included

TABLE III. Standard resistance values for the 10 to 100 decade.

Resistance tolerance ----------------------------------------------------------------------------------------- B,C,D F B,C,D F B,C,D F B,C,D F B,C,D F B,C,D F .1,.25,.5 1.0 .1,.25,.5 1.0 .1,.25,.5 1.0 .1,.25,.5 1.0 .1,.25,.5 1.0 .1,.25,.5 1.0 ----------------------------------------------------------------------------------------- 10.0 10.0 14.7 14.7 21.5 21.5 31.6 31.6 46.4 46.4 68.1 68.1 10.1 ---- 14.9 ---- 21.8 ---- 32.0 ---- 47.0 ---- 69.0 ---- 10.2 10.2 15.0 15.0 22.1 22.1 32.4 32.4 47.5 47.5 69.8 69.8 10.4 ---- 15.2 ---- 22.3 ---- 32.8 ---- 48.1 ---- 70.6 ---- 10.5 10.5 15.4 15.4 22.6 22.6 33.2 33.2 48.7 48.7 71.5 71.5 10.6 ---- 15.6 ---- 22.9 ---- 33.6 ---- 49.3 ---- 72.3 ---- 10.7 10.7 15.8 15.8 23.2 23.2 34.0 34.0 49.9 49.9 73.2 73.2 10.9 ---- 16.0 ---- 23.4 ---- 34.4 ---- 50.5 ---- 74.1 ---- 11.0 11.0 16.2 16.2 23.7 23.7 34.8 34.8 51.1 51.1 75.0 75.0 11.1 ---- 16.4 ---- 24.0 ---- 35.2 ---- 51.7 ---- 75.9 ---- 11.3 11.3 16.5 16.5 24.3 24.3 35.7 35.7 52.3 52.3 76.8 76.8 11.4 ---- 16.7 ---- 24.6 ---- 36.1 ---- 53.0 ---- 77.7 ---- 11.5 11.5 16.9 16.9 24.9 24.9 36.5 36.5 53.6 53.6 78.7 78.7 11.7 ---- 17.2 ---- 25.2 ---- 37.0 ---- 54.2 ---- 79.6 ---- 11.8 11.8 17.4 17.4 25.5 25.5 37.4 37.4 54.9 54.9 80.6 80.6 12.0 ---- 17.6 ---- 25.8 ---- 37.9 ---- 55.6 ---- 81.6 ---- 12.1 12.1 17.8 17.8 26.1 26.1 38.3 38.3 56.2 56.2 82.5 82.5 12.3 ---- 18.0 ---- 26.4 ---- 36.8 ---- 56.9 ---- 83.5 ---- 12.4 12.4 18.2 18.2 26.7 26.7 39.2 39.2 57.6 57.6 84.5 84.5 12.6 ---- 18.4 ---- 27.1 ---- 39.7 ---- 58.3 ---- 85.6 ---- 12.7 12.7 18.7 18.7 27.4 27.4 40.2 40.2 59.0 59.0 86.6 86.6 12.9 ---- 18.9 ---- 27.7 ---- 40.7 ---- 59.7 ---- 87.6 ---- 13.0 13.0 19.1 19.1 28.0 28.0 41.2 41.2 60.4 60.4 88.7 88.7 13.2 ---- 19.3 ---- 28.4 ---- 41.7 ---- 61.2 ---- 89.8 ---- 13.3 13.3 19.6 19.6 28.7 28.7 42.2 42.2 61.9 61.9 90.9 90.9 13.5 ---- 19.8 ---- 29.1 ---- 42.7 ---- 62.6 ---- 92.0 ---- 13.7 13.7 20.0 20.0 29.4 29.4 43.2 43.2 63.4 63.4 93.1 93.1 13.8 ---- 20.3 ---- 29.8 ---- 43.7 ---- 64.2 ---- 94.2 ---- 14.0 14.0 20.5 20.5 30.1 30.1 44.2 44.2 64.9 64.9 95.3 95.3 14.2 ---- 20.8 ---- 30.5 ---- 44.8 ---- 65.7 ---- 96.5 ---- 14.3 14.3 21.0 21.0 30.9 30.9 45.3 45.3 66.5 66.5 97.6 97.6 14.5 ---- 21.3 ---- 31.2 ---- 45.9 ---- 67.3 ---- 98.8 ----

The resistance tolerance is identified by a single letter in accordance with table IV. TABLE IV. Resistance tolerance.

Symbol Resistance tolerance ------------------------------------ Percent (±) B 1/ 0.10 C 1/ 0.25 D 1/ 0.50 F 1.00 1/ Applicable only to characteristics C, E, and P.