Randolph New Jersey –Douglas Electrical Components designs and manufactures hermetic connectivity solutions utilizing MIL-DTL-38999 for power, signal, networking, and fiber optic applications.

D38999 Series I, II, III, and IV circular connectors

MIL-DTL-38999 (formerly MIL-C-38999) circular connectors are designed in a variety of industries and applications, most prominently military, aerospace, and defense applications. Compact design, robust metal housing, lightweight footprint, and variety of pin counts allow for flexibility in design without compromising survivability in harsh environments.

Back-potting utilizes epoxy to hermetically seal the back side of the electrical connection. This not only protects against moisture and dust, but creates a true hermetic seal to a standard leak rate of < 1X10-9 std cc/sec. While leak rate is a common standard in the vacuum and space industry, a leak rate of 10-5 std cc/sec, as an example, is approximately 1 cc/day while 10-7 std cc/sec is approximately 3cc/year. Back potting can aide the shock and vibration survival of an electrical cable assembly, reducing wear to contacts. The actual potting material utilized by Douglas is NASA certified low outgassing epoxy, tested per ASTM E-595-93 (0.33% TML. 0.00% CVCM).

Read more about Douglas Electrical’s hermetic bulkhead and fiber-optic connectors.

Douglas Electrical supports the military and defense industries with commercial off-the-shelf (COTS) designs, utilizing commercially available components, as well as partners with Tier 1 and 2 customers with custom and ITAR-, DDTC-, and DFARS-compliant assemblies. Douglas Electrical’s epoxy seals meet the MIL-STD-883 definition of hermetic with a typical overall assemble leakage rate of <1×10^-9 cc-He/sec. Actuators, vacuum and fuel pumps, cameras, and sensors are some of the common mil/aero applications to utilize the D38999 hermetic connector.

Douglas Electrical designs to a variety of 38999 series (I, III, IV) and pin outs based on customer need.