MIL-DTL-83731/14D
Operating temperature:
a.
50 percent of the test cycle at room ambient conditions.
b.
50 percent of the test cycle at 71 +4°C or -0°C.
Short circuit: Use 100 amperes at 28 V dc.
Flux sealed: The sealing is obtained when the base is sealed to prevent flux from entering the switch case during
the wave soldering process.
Flux seal test: Three switches shall be tested as follows during qualification and group B inspection: Measure
and record initial contact resistance. Place switches, terminals down, into a shallow pan. Pour flux at 80°F ±5°F,
type RMA of ANSI J-STD-004, specific gravity 0.896, into pan without splashing until level of flux is approximately
1/16 inch above the bottom of the plastic switch case and let switches soak for ten minutes. Remove switches
from flux, clean with flux cleaning solvent and immediately put into oven for drying at 175°F for two hours. After
switches have cooled at room temperature, repeat initial measurement. Contact resistance shall not increase by
more than 10 milliohms over the initial reading. Disassemble and visually examine the contact area for evidence
of flux shall be cause for rejection.
Military Part or Identifying Number (PIN): The PIN shall consist of the prefix M83731/14 followed in order by the
appropriate three-digit number from table II as shown in the following example:
M
83731/14
-
211
|
|
|
Military designation
|
|
|
|
|
Specification sheet number
|
|______________Number from table II denotes
Switch has ON-OFF-ON circuit. 1/
1/ Listed dash numbers, ending with the number 1, are interchangeable with and supersede canceled dash numbers
ending with the numbers 2 and 3.
TABLE II. Circuit for switching characteristic.
Circuit with toggle in
Circuit
Down position
Center position
Up position
211
1-2 ON 4-5
OFF
2-3 ON 5-6
231
1-2 ON 4-5
NONE
2-3 ON 5-6
261
1-2 MOM-ON 4-5
NONE
2-3 ON 5-6
271
1-2 MOM-ON 4-5
OFF
2-3 MOM-ON 5-6
311
1-2 MOM-ON 4-5
OFF
2-3 ON 5-6
321
1-2 ON 4-5
2-3 ON 4-5
2-3 ON 5-6
331
1-2 MOM-ON 4-5
2-3 ON 4-5
2-3 ON 5-6
341
1-2 MOM-ON 4-5
2-3 ON 4-5
NONE
351
1-2 MOM-ON 4-5
2-3 ON 4-5
2-3 MOM-ON 5-6
4
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