MIL-R-93 Resistors, Fixed, Wire-Wound, Accurate, General Specification ForThis specification covers the general requirements for accurate, wire-wound, fixed resistors having a maximum resistance tolerance of 1 percent, with the winding protected against high humidity. The resistors are rated for continuous full load operation at any ambient temperature up to 125 Degrees C, and derated up to 145 Degrees C. They are not capable for application where alternating current ac characteristics are of critical importance. Performance characteristics are in accordance with table I.

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Inspection

Requirement

paragraph

Method

paragraph

Number of

sample units for inspection

Number of

defectives allowed

1/

Certification requirements

Fungus

3.22

4.7.18

N/A

Group I

DC resistance

Visual and mechanical examination 2/

Short time overload

Thermal shock

3.6

3.1, 3.3 to 3.4.3 inclusive,

3.23 to 3.26 inclusive

3.7

3.8

4.7.2

4.7.1

4.7.3

4.7.4

100 percent

0

Group IA

Solderability  3/ Resistance to solvents

3.9

3.10

4.7.5

4.7.6

10

1

Group II

Insulation resistance

Moisture resistance

Dielectric withstanding voltage

Terminal strength

3.11

3.12

3.13

3.14

4.7.7

4.7.8

4.7.9

4.7.10

6

Group III

Life

3.15

4.7.11

6

Group IV

Resistance temperature characteristic

Low temperature storage Low temperature operation High temperature exposure

3.16

3.17

3.18

3.19

4.7.12

4.7.13

4.7.14

4.7.15

6

Group V

Shock, specific pulse

Vibration, high frequency

3.20

3.21

4.7.16

4.7.17

6

Group VI

Visual and mechanical examination

3.1, 3.3 to 3.4.3 inclusive,

3.23 to 3.26 inclusive

4.7.1

2