MIL-STD 202 Method 107

MIL-STD 202 are standards developed by the US Department of Defence to test the resistance of electrical and electronic components against various environmental factors. Method 107 under MIL-STD 202 assesses the resistance of electrical and electronic components against extreme temperatures such as when any component is taken outside from a heated room in Arctic areas.

TRUSTED BY ENGINEERS FROM

MIL-STD 202 Method 107

Written by Rahul Verma | Updated: September 10, 2025

Thermal Shock Testing ( MIL-STD 202 method 107)

The MIL-202 temperature shock test helps measure the tolerance of electrical and electronic components to extreme temperatures, both high and low. Through this test, the material’s resilience to the shock of several exposures to these extremes is also assessed. When moving supplies or components between heated shelters in frigid regions, this might happen. Equipment that is used intermittently in low-temperature environments or while being transported may also experience these circumstances.

The specimen should achieve thermal stability during the designated exposure. However, to save time, components could be evaluated for the shortest exposure times, which will come close to, but not guarantee, thermal stability. Physical damage from variances in size and other physical features may lead to permanent alterations in functioning. Procedure to test thermal shock

Video 01: Thermal Shock Test Electronic Components

Materials are tested in extreme temperature conditions inside environment chambers with air or liquid baths. The temperatures should be evaluated keeping in mind the thermal properties of the components. The specimen is placed inside the chamber in such a way that it gets maximum exposure to the heated/cooled air or liquid. The material is subjected to continuous cycles of high temperature to low temperature and vice versa for 5 cycles. A test can be interrupted after that. Single or multiple chambers can be used but the effective transition time should not be more than 5 minutes. In the case of liquid baths, only prespecified liquids are allowed to be used.

Problems that may occur due to thermal shock