MIL-R-83407 Relays, Reed Mercury Wetted General Specification ForThis specification establishes the general requirements for mercury wetted reed relays that perform the switching functions associated with ground control support equipment. These relays are not be used in shipboard or airborne applications.

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MIL-R-83407C

3.3.1 Plastic. Plastic shall be of such quality as to ensure that the relay meets all the performance requirements of this specification

3.3.2 Ceramic. Ceramic insulating material shall be of such quality as to ensure that the relay meets all the performance requirements of this specification. Ceramic used for external surfaces shall be glazed.

3.3.3 Base metals. Base metals shall be of a corrosion-resistant type or shall be plated or treated to resist corrosion.

3.3.4. Magnet wire. Magnet wire used shall enable the relay to meet the performance requirements of this specification.

3.3.5 Rubber. Rubber shall be of such quality as to ensure that the relay meets all the performance requirements of this specification.

3.3.6 Fungus resistance. Materials used in the construction of relays shall be fungus inert in accordance with

ASTM G 21 .

3.4. Interface and construction. Relays shall be of the design, construction, weight, and physical dimensions specified (see 3.1). Relays shall be designed to ensure proper operation when mounted as specified (see 3.1).

3.4.1 Enclosures. When specified (see 3.1), relays shall be provided with a metal enclosure for shielding and magnetic path purposes. When specified, provisions shall be provided for electrically grounding the enclosure.

3.4.2 Encapsulation. Unless otherwise specified (see 3.1), relays shall be encapsulated.

3.4.3 Contacts. Contacts shall have the load ratings and arrangements as specified (see 3.1), and shall be capable of carrying the maximum rated current continuously, provided an appropriate arc suppression circuit is connected across each pair of contacts.

3.4.4 Coils. Coils shall be insulated electrically from the frame, the contacts, and the enclosure and shall be designed for continuous operation at the rated voltage. The resistance and rated voltage shall be as specified (see

3.1).

3.4.4.1 Terminal identification. Unless otherwise specified (see 3.1), a contrasting colored bead shall be used to designate X1 (positive, if applicable) terminal.

3.4.5 Circuit diagram. The circuit diagram shall be as specified (see 3.1).

3.4.6 Temperature range. The operating temperature range shall be as specified (see 3.1).

3.5 Solderability (applicable to solder terminals). When relays are tested as specified in 4.5.2, the dipped surface of solid wire-lead and pin terminals shall be at least 95 percent covered with a continuous new solder coating in accordance with method 208 of MIL-STD-202 .

3.6 Dielectric withstanding voltage. When relays are tested as specified in 4.5.3, they shall withstand the specified voltage (see 3.1) without damage. The leakage current shall not exceed 1 milliampere (mA) and there shall be no evidence of damage due to arcing (air discharge), flashover (surface discharge), or insulation breakdown (puncture discharge).