MIL-PRF-23648F
TABLE IV. Qualification inspection.
Inspection
Requirement
Method
Number of
Allowable
paragraph
paragraph
sample units
defects 1/
Group I
All sample
Visual and mechanical inspection 2/ 3/
units 4/
Zero power resistance 3/
0
Resistance ratio characteristic 3/
Group II
Solderability
12 both leads
Resistance to solvents
12
Group III
Short time overload
Insulation resistance
2
Dielectric withstanding voltage
Low temperature storage
10
High temperature storage
Dissipation constant 3/
Thermal time constant 3/
Terminal strength
Group IV
Resistance temperature characteristic 3/
10
Thermal shock
Resistance to soldering heat
Moisture resistance
Group V
2
Load life
10
Group VI
High temperature exposure
10
Group VII
Vibration, high frequency
Shock, specified pulse
10
Immersion
1/ Failure of the same thermistor in one or more tests of a group shall be charged as a single defective
thermistor.
2/ Marking (where applicable) will be considered defective only if the marking is incorrect, incomplete, or
illegible.
3/ Nondestructive tests.
4/ Sample units for group II shall not be subject to group I.
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