MS27468T17B35P Bel Fuse

38999 S II MIL-DTL-38999 Features and Application Series II Features and Application Closed-Entry Socket Insert Hard dielectric socket face has lead-in chamfers for positive alignment of pins (even partially bent within pre-established limits) with sockets. MIL-DTL-38999 Series II connectors feature a bayonet coupling mechanism with lower profile design and Interfacial Pin Insert Seal Raised moisture barriers rear-removable crimp contact retention system. around each pin, which mate into lead-in chamfers of hard face socket insert, provide individual contact sealing. Inter- These connectors were designed for military and commercial facial seal is never touched by service tools. applications where the prime requirements are lower profile and lighter weight. Elastomer Wire Sealing Grommet Sealing over a wide range of wire diameters is assured by a triple wire seal in Reduction of both size and weight were achieved through the each cavity at the rear of the connector. use of thinner shell walls and length restrictions. These design restrictions reduced the RFI attenuation characteristics and the Superior Contact Stability Rear release crimp contact scoop protection, while yielding an excellent general purpose, system features a stamped beryllium-copper retaining clip lightweight connector. Compared to Series I, Series II connec- captivated by molded-in shoulders of each contact cavity in tors achieve up to 20% reduction in mated pair length, up to the insulator. A rear-inserted M81969 plastic tool expands 39% reduction in outside diameter and up to 40% reduction in the tines beyond the shoulder, releasing the contact. weight (128 pin mated pair). Shell Polarization Alternate key/keyway positions prevent This family of connectors is offered in six receptacle-mounting cross mating of adjacent connectors having same insert styles. They include square flange receptacles, for both front arrangement. and rear panel (wall) mounting square flange receptacles, for both front and rear panel (box) mounting square flange recep- tacle with extended grommet, for front of panel (box) mount- ing and jam nut receptacles which incorporate O ring seals, designed for rear panel D hole mounting. Plugs are available in two designs, with and without RFI grounding. Fifty-two insert arrangement per MIL-STD-1560 are tooled and qualified to MIL-DTL-38999 Series II, utilizing 3 to 128 M39029 contacts. Contacts come in sizes 22D, 22M, 22, 20, 16 and 12, terminating wire sizes from 28 to 12 gauge. These connectors are available in wide range of shell materials and finishes. Aluminum shells are offered in electroless nickel, bright cadmium, anodized, and olive drab cadmium. Other fin- ishes such as zinc cobalt are available upon request to commer- cial callouts only. In addition, we offer passivated stainless steel shells with standard environment-resisting inserts (commercial callouts only). Universal I/R Tool A single, expendable plastic tool is used for both insertion and removal of contacts. www.conesys.com 22 sales aero-electric.com 38999 S II MIL-DTL-38999 Performance Specifications Series II Performance Specifications Shell-to-Shell Conductivity Maximum potential drop shall not exceed: Operating Temperature Range With RFI spring fingers, finish F = 1.0 millivolt, while Finish B: -65C to +175C (-85F to +347F) finishes A and B = 2.5 millivolts. Finishes C and F: -65C to +200C (-85F to +392F) Without spring fingers = 200 millivolts. Finish A: -65C to +150C (-85F to 302F) Finish C = nonconductive. Material and Plating Data (Finish) Shielding Effectiveness B aluminum shell, olive drab cadmium over nickel base RFI and EMI attenuation at the specified frequencies meet C aluminum shell, black anodized finish the requirements of MIL-DTL-38999. F aluminum shell, electroless nickel finish RFI shielding effectiveness of mated connectors with A aluminum shell, silver to light iridescent yellow color RFI backshells is measured in a triaxial radio frequency (bright) cadmium over electroless nickel base leakage fixture. EMI shielding effectiveness is measured at the interface Corrosion Resistance of mated connectors and tested by the mode-stirred tech- Finishes A, B and C withstand 500-hour salt spray. nique specified in method 3008 of MIL-STD-1344. Finish F withstands 48-hour salt spray. Shock and Vibration Requirements Durability Wired, mated connectors shall not be damaged, nor shall Mated connectors withstand a minimum of 250 mating there be a current interruption longer than one microsecond cycles for RFI plug (MS27484) and 500 cycles for MS27473 when subjected to the following: and MS27500 plugs. Standard Shock Environmental Seal Mated connectors withstand a pulse of approximate half Wired, mated connectors with specified accessories at - sine wave of 300 G magnitude with duration of three tached, shall meet the altitude-immersion test specified by milliseconds applied in three axes per MIL-STD-1344, MIL-DTL-38999. method 2004. Fluid Resistance Vibration Connectors resist specified immersions in MIL-PRF-7808, Mated connectors withstand the following vibration levels: MIL-PRF-23699, MIL-PRF-5606, M2-V Chevron oil, Coolanol Random vibration per MIL-STD-1344, method 2005 test 25, MIL-DTL-83133 (JP-8), MIL-DTL-5624 (JP-4, JP-5), condition VI, Letter J. SAE-AMS1424 Type I, and other solvents and cleaning agents. Voltage Rating Suggested Operating Voltage Test Voltage Test Voltage Test Voltage Test Voltage Service (Sea Level) Sea Level 50,000 Ft. 70,000 Ft. 100,000 Ft. Rating AC (RMS) DC V RMS V RMS V RMS V RMS M 400 550 1300 550 350 200 N 300 450 1000 400 260 200 I 600 850 1800 600 400 200 II 900 1250 2300 800 500 200 Note: The establishment of electrical safety factors is left exactly what peak voltages, switching currents, transients, etc., entirely to the designer, as he is in the best position to know can be expected in a particular circuit. www.conesys.com 23 sales aero-electric.com