MILNEC MIL-DTL-38999 系列 III 接插件说明书

MILNEC MIL-DTL-38999 系列 III 接插件说明书

Rev. 1301.1B-8T X TX Series • MIL-DTL-38999 Series III Style Connectors

Contact Characteristics Contact Design Environmental Removable, rear-release crimp contacts Hermetic Solder style, permanently bonded to insert Contact Sizes #8 (Coax, T winax), #12, #16, #20, #22D Contacts Crimp Beryllium copper alloy, per ASTM B197 Contacts Hermetic Nickel-iron (Type 52 alloy), per ASTM F30 Contact Plating Standard Crimp Gold plate over nickel, 50 µinches (1.27 µm) minimum High-Cycle Crimp Gold plate over nickel, 150 µinches (4.00 µm) minimum Hermetic Gold plate over nickel, 50 µinches (1.27 µm) minimum Socket Contact Hood Stainless steel, passivated Max Number of Contacts 128 x #22D contacts standard, custom inserts available Max Contact Resistance

Size #22D: 14.6 milliohm maximum Size #20: 7.3 milliohm maximum Size #16: 3.8 milliohm maximum Size #12: 1.7 milliohm maximum

Size #8: 3.0 milliohm maximum Max Voltage Drop Crimp Contacts <73 millivolt maximum drop (initial) Hermetic Contacts <85 millivolt maximum drop (initial) Contact Retention Pin and socket contacts are designed to resist severe vibration and repeated connection and disconnection Electrical Characteristics Current Rating 23 amps (test current) at 68°F (20°C) Max Operating Voltage 900 VAC (RMS) at sea level Insulation Resistance >5,000 megohms at 77°F (25°C) Wire Size 12 to 28 (AWG) Wire Sealing Range Designed for individual wire sealing Sealing is only guaranteed if wires meet

MIL -W-5086 or within permitted ranges

Material Characteristics

Shell Environmental Aluminum, solid, one piece, seamless construction Stainless Steel, solid, one piece, seamless construction Composite, solid, one piece, seamless construction Hermetic Stainless Steel, solid, one piece, seamless construction Shell Plating (Standard Finishes) W Finish Electrically conductive cadmium plate finish with an olive drab chromate after-treat for additional corrosion resistance (500 hr salt spray rating) N, G Finish Electrically conductive electroless nickel plating (48 hr salt spray rating) K Finish Passivated (1,000 hr salt spray rating) RFI Grounding Fingers Beryllium copper alloy or stainless steel Shell Conductivity (Standard Finishes) Per MIL -STD-1344, method 3008, maximum conductivity potential drop shall not exceed the following: W Finishes 2.5 millivolts across assembly shell-to-shell 5.0 millivolts across assembly shell-to-braid N, G, K, KS, L Finishes 1.0 millivolts across assembly shell-to-shell 3.5 millivolts across assembly shell-to-braid J, M Finishes 3.0 millivolts across assembly shell-to-shell 6.0 millivolts across assembly shell-to-braid HA, HB Finishes 10.0 millivolts across assembly shell-to-shell 15.0 millivolts across assembly shell-to-braid Magnetic Permeability Less than 2.0 mu when measured to EIA-364-54 Insert

Glass filled liquid crystal polymer (LCP) Non-removable and mechanically bonded to shell Hermetic Insert Vitreous (glass compression) Non-removable and mechanically bonded to shell Protective Cover Chain Passivated stainless steel, wire rope able to withstand a 25 lb (11.3 kg) tensile force without damage Adhesives RTV and epoxies Grommet, Peripheral Seal, O-Ring, & Interfacial Seal Blended fluorosilicone (70%) and silicone (30%) elastomer

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