MIL-DTL-27599 Connectors, Electrical, Circular, Miniature, High Density, Quick Disconnect, Environment Resistant, Solder Contacts, General Specification ForThis specification covers two series of miniature, high density, quick disconnect, bayonet coupling, circular, environment resistant, electrical connectors capable of continuous operation within a temperature range of -65 Degrees C to +175 Degrees C \(see 6.1\). These connectors are intermateable with applicable series I and series II connectors of MIL-DTL-38999. These connectors are supplied under a MIL-STD-790 reliability assurance program. See 6.1 for restrictions on intended use and applications.

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MIL-DTL-27599D

1.2 Description. Both series employ fixed pin and socket contacts with solder termination. Both series

are designed to assure proper orientation of the mating halves prior to electrical circuit closure. Both

series provide EMI shielding capability. Series I provides electrical continuity between mated shells prior

to contact engagement and have the contacts so located as to be protected from handling damage and

inadvertent electrical contact. Series II provides low silhouette for minimum size and weight and includes

connectors which provide shell-to-shell electrical continuity when mated.

1.2.1 Design considerations. Connectors are capable of satisfactory performance during or after, as

applicable, subjection to the following environmental conditions:

1.2.2 Temperature. Temperatures from -65�C to +175�C (see 1.3.1d).

1.2.3 Vibration. Vibration from 10 to 2,000 Hz sinusoidal at 10 g's at ambient temperature.

1.2.4 Shock. Shock as represented by a 3 � 1 milliseconds base half-sine wave peaking at 30 g's.

1.2.5 Humidity. Humidity conditions up to 98 percent relative humidity including condensation.

1.2.6 Temperature cycling (see 4.6.2).

1.2.7 EMI shielding. EMI shielding effectiveness:

Series I:

100 MHz to 1 GHz � minimum attenuation of 85 dB.

Series II:

100 MHz to 1 GHz � minimum attenuation of 45 dB.

1.3 Classification.

1.3.1 Connectors. Connectors fabricated to this specification are classified as follows:

a. Series. The series I and II connectors are not interchangeable or intermateable.

I � Scoop-proof.

II � Non-scoop-proof, low silhouette.

b. Types:

(1) Plugs:

Straight, without spring fingers.

Straight, with spring fingers that make shell contact prior to contact engagement.

Straight, with spring fingers that make shell contact after contacts engage.

(2) Receptacles:

Box mounting, both front and rear panel mounting.

Wall mounting, both front and rear panel mounting.

Jam-nut mounting.

Classes:

P � For potting: Includes potting form.

T � General duty: Pressurized (receptacles only).