MIL-STD 202 establishes uniform methods for testing electronic and electrical component parts, including basic environmental tests to determine resistance to deleterious effects of natural elements and conditions surrounding military operations and physical and electrical tests. For the purpose of this standard, the term “component parts” includes such items as capacitors, resistors, switches, relays, transformers, inductors and others. This standard is intended to apply only to small component parts, weighing up to 300 pounds or having a root mean square test voltage up to 50,000 volts unless otherwise specifically invoked.

MIL-STD 202 outlines the suitable conditions obtainable in the laboratory that give test results equivalent to the actual service conditions existing in the field, and to obtain reproducibility of the results of tests. MIL-STD 202 tests are not to be interpreted as an exact and conclusive representation of actual service operation in any one geographic location, since the only true test for operation in a specific location is an actual service test at that point.

The test methods established in MIL-STD 202 for environmental, physical, and electrical tests shall also apply, when applicable, to parts not covered by an approved military specification, military sheet form standard, specification sheet, or drawing. The D.L.S. technical staff can provide guidance in this area to ensure proper testing paths are appropriate.

MIL-STD 202 tests are divided into three classes: Test methods, see below, numbered 101 to 199 inclusive, cover environmental tests; those numbered 201 to 299 inclusive cover physical characteristics tests; and those numbered 301 to 399 inclusive cover electrical characteristics tests.

The most current revision of MIL- STD 202, Revision H, replaced Revision G. Updated revisions of the test methods are indicated by a letter following the method number.

D.L.S. can support MIL-STD 202 testing requirements, as well as MIL-STD 461 for EMI/EMC and MIL-STD 810 for Environmental requirements. The technical staff can provide development assistance in the form of test plans and procedures, as well design assistance. Contact D.L.S. today to review your next project.

              MIL STD 202 Rev H

Method                   Tests

Environmental Tests:

-101      Salt atmosphere (corrosion) (formerly called salt spray)

-102      Superseded by Method 107 (see 6.3)

-103      Humidity (steady state)

-104      Immersion

-105      Barometric pressure (reduced)

-106      Moisture resistance

-107      Thermal shock

-108      Life (at elevated ambient temperature)

-109      Explosion

-110      Sand and dust

-111      Flammability (external flame)

-112      Seal


Physical Characteristics Tests:

-201      Vibration

-202      Superseded by Method 213 (see 6.3)

-203      Random drop

-204      Vibration, high frequency

-205      Superseded by Method 213 (see 6.3)

-206      Life (rotational)

-207      High-impact shock

-208      Solderability

-209      Radiographic inspection

-210      Resistance to soldering heat

-211      Terminal strength

-212      Acceleration

-213      Shock (specified pulse)

-214      Random vibration

-215      Resistance to solvents

-216      Superseded by Method 210 (see 6.3)

-217      Particle impact noise detection (PIND)


Electrical Characteristic Tests:  

-301      Dielectric withstanding voltage

-302      Insulation resistance

-303      DC resistance

-304      Resistance temperature characteristic

-305      Capacitance

-306      Quality factor (Q)

-307      Contact resistance

-308      Current-noise test for fixed resistors

-309      Voltage coefficient of resistance determination procedure

-310      Contact-chatter monitoring

-311      Life, low level switching

-312      Intermediate current switching