MIL-DTL-15291G
3.6.6 Overload. The switches shall remain mechanically and electrically operative when subjected to
the overload test specified (see 4.7.6) (applicable to 1SR and 3SR only).
3.6.7 Contact resistance. The contact resistance shall not exceed the following values for the class of
switch indicated (see 4.7.7).
Maximum allowable
Class
contact resistance (ohms)
1SR and 1SRN
0.02
3SR
0.01
6SR
0.005
20SR
0.0015
3.6.8 Temperature rise. The temperature rise at the switch stationary contact shall not exceed 50
degrees Celsius (°C) when measured as specified (see 4.7.8).
3.6.9 Endurance. The switch shall remain mechanically and electrically operative during and following
3.6.10 Insulation resistance. The insulation resistance shall be not less than 200 megohms
(see 4.7.10).
3.7 Marking. Except as indicated herein (see 6.2), marking shall be in accordance with MIL-STD-1285.
3.7.1 Identification of product. Switches shall be marked with the information required in 3.7.3 or 3.7.4
as applicable. Electrical ratings shall be marked on the switch caps. Other required marking shall be
located on the terminal boards of back-connected switches and, except for terminal markings, on the
base plates of side-connected switches. Terminal boards shall be marked by silk screening, hot
stamping, or engraving. Base plates and caps shall be marked by die stamping or engraving.
3.7.2 Terminal marking. Terminal marking on back-connected switches shall be located on the
terminal boards, adjacent to the terminals designated. Terminal marking on side-connected switches
shall be die stamped on the terminals, clear of the screw heads, and shall be visible from the rear of front
mounted switches and from the front of base mounted switches.
3.7.3 Switches covered by specification sheets. Switches covered by specification sheets shall be
identified by:
a. Electrical rating
b. Part or identifying number (PIN) (for example M15291/1-001)
d. Manufacturer's name, symbol, or CAGE
e. Date code
f. Terminal identification as specified in the applicable specification sheet.
3.7.4 Switches not covered by specification sheets. Switches not covered by specification sheets shall
be identified by:
a. Electrical rating
b. Manufacturer's part number
c. Government drawing number
d. Manufacturer's name, symbol, or CAGE
e. Date code
f. Terminal identification.
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