MIL-DTL-15291/3B
REQUIREMENTS:
Applicable specification: MIL-DTL-15291.
Dimensions and mounting: See figure 1.
Switching characteristics: See table I.
Angle of throw: 90 degrees.
Switching action: Snap action, reciprocating.
Electrical and endurance ratings: See table II.
Stop strength (applicable to switches with stops): 30 inch-pounds.
Vibration: 50 Hz, MIL-STD-167-1.
Shock (high impact): High impact, MIL-S-901.
Overload: 600 percent of ac rating, 50 make and break operations.
Contact resistance: 0.02 ohms maximum.
Dielectric withstanding voltage: 1,250 V rms.
Insulation resistance: : 200 megohms minimum.
Temperature rise: 50°C maximum.
Mounting screws: .190-24UNC-2A (4) length and headstyle to suit application. Screws not furnished.
Terminal marking: Terminal markings shown in table I locate terminals as viewed from the front of the
switch (handle end). Markings shall be stamped in front surfaces of terminals, clear of the screw
heads.
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 arrangement, 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
rating listed in table III. Reduced life expectancy must be anticipated for switches used at 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.
Application and Acquisition Guide: PIN and type designation cross reference shall be as shown on
table IV.
TABLE II. Electrical and endurance ratings.
De-energized
Electrical
operations
Test rate
Tests
Current
Voltage
operations
(number of
(operations
(amperes)
(volts)
(number of
operations)
per minute)
operations)
Alternating
20,000
30
30,000
125
10
current (rms)
---
15
20,000
120
10
Direct current
6
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