MIL-DTL-15291/8B
GENERAL INFORMATION:
Switches not covered by specification sheets: Switches which are fabricated from standard parts, as
used in qualified switches, but which do not comply with switches detailed herein with respect to circuit
characteristics, switching action, mounting arrangements, and handle details may be acquired under
this specification from contractors having qualification approval under this specification.
Extended ratings: Switches detailed herein have been tested and found satisfactory at the extended
ratings listed in table III. Reduced life expectancy must be anticipated for switches used in these
increased voltage or current levels. Tests under the conditions of table III are not required for
qualification acceptance and they are not repeated routinely as for maintenance of qualification.
Supplemental evaluations and tests applicable to particular circuit requirements are recommended.
TABLE III. Extended ratings.
AC -60 or 400 Hz
Switching
125 volts
250 volts
500 volts
character
Resistive or
Inductive load
Resistive or
Inductive load
Resistive or
Inductive load
istics
lamp load
0.75 p. f.
lamp load
0.75 p. f.
lamp load
0.75 p. f.
Amp.
Operations
Amp.
Operations
Amp.
Operations
Amp.
Operations
Amp.
Operations
Amp.
Operations
All
60
6,000
60
6,000
60
6,000
60
6,000
60
6,000
60
6,000
E, F
75
3,000
75
3,000
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A, B 1/
75
3,000
75
3,000
60
6,000
60
3,000
60
3,000
60
3,000
DC
120 volts
250 volts
350 volts
Resistive or
Inductive load
Resistive or
Inductive load
Resistive or
Inductive load
lamp load
2/
lamp load
2/
lamp load
2/
Amp.
Operations
Amp.
Operations
Amp.
Operations
Amp.
Operations
Amp.
Operations
Amp.
Operations
All
60
3,000
50
1,500
30
3,000
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A, B
60
4,000
60
4,000
60
4,000
50
3,000
30
3,000
30
3,000
1/ Single pole break: All other ratings are based on breaking both sides of the line in accordance with
figures 1 and 2.
2/ 0.04 henry for inductive circuit.
6
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