MIL-DTL-21604 Switches, Rotary, Multipole And Selector; General Specification ForThis specification covers the general requirements for closed construction rotary multipole and selector switches which are able to make, break, and carry electrical loads up to and including 10 amperes.

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MIL-DTL-21604F

6. NOTES

(This section contains information of a general or explanatory nature that may be helpful, but is not mandatory.)

6.1 Intended use.

6.1.1 Communication and low power control equipment. The switches covered by this specification are intended

for use in communication and low power control equipment where reliability and ruggedness are required.

6.1.2 DC ratings. No dc ratings are given for the switches included in this specification. The switches can be

"teased" (slow movement of the rotor contacts making and breaking the stator contacts) and this "teasing" is highly

destructive to contacts in switching dc loads. For 30-volt dc resistive loads, the maximum current interrupted by the

switches should not exceed one-half that shown for the individual styles at 125 volts ac unless reduced switch life can

be tolerated. For other dc applications, inquiries should be addressed to the command or agency concerned

indicating the voltage, current, type of load, and life expectancy in terms of cycles of operation.

6.2 Acquisition requirements. Acquisition documents must specify the following:

Title, number, and date of the specification.

If required, the specific issue of individual documents referenced (see 2.2.1 and 2.3).

Title, number, and date of the applicable specification sheet and the type designation (see 3.1 and 6.5).

For switches covered by a specifications sheet but differing in number of sections, the number of sections

required (see 3.3.1).

e. For types of switches not shown on a specification sheet, applicable complementary documents such as

manufacturer's drawings or data sheets showing details of variations from the specification sheet (see 3.3.2).

f. Inspection requirements, if other than as specified in 4.6 (see 3.3.2).

g. Materials, if other than as specified (see 3.4).

h. Contact surface, if other than as specified (see 3.4.1.1).

Insulation, if other than as specified (see 3.4.2.1 and 3.4.2.2).

j. Design and construction (see 3.5).

k. Threaded parts, if other than as specified (see 3.5.1).

l. Mounting hardware (see 3.5.1.3.1).

m. Terminal hardware (see 3.5.1.3.2).

n. Knobs (see 3.5.1.3.3).

o. Whether stops are required and their positions (see 3.5.2).

p. Operating shafts (see 3.5.3).

q. Terminals (see 3.5.4).

r. Rotational torque (see 3.8.1).

s. Temperature rise (see 3.14).

t. Whether seal is applicable (see 3.19).

u. Marking (see 3.20). Samples required for qualification, if necessary (see 4.51).

v. Inspection requirements: To determine suitability of variations from qualified switch style, the acquisition

document should specify:

(1) Tests to be performed if other than specified (see 4.6).

(2) Data and samples to be submitted, if any (see 4.6.1).

w. Circuit configuration and diagrams to be used for specifying the circuit configuration for each switch section

(see 4.8.2).

x. Terminal strength, if other than as specified (see 4.8.5).

y. Dielectric withstanding voltage: Test voltage, if other than as specified (see 4.8.6).

z. Endurance, if other than as specified (see 4.8.9.2).

aa. Packaging requirements (see 5.1).