Circular Connectors (Military Connector)

MIL-DTL-38999 II Series Applications of Circular Connectors

Our MIL-DTL-38999 II series circular connectors are designed for crucial circuit signal connections in various industries.

MS27508E18B35PB MS27484T22B35P General Information Compliant with the industry-standard MIL-DTL-38999 II series Quick and secure bayonet coupling The smallest size, lightest weight, and shortest shell length among the D38999 series EMI/RFI shielding capabilities Removable contacts for easy installation, without anti-oblique mating, making socket-to-pin connections in tight spaces hassle-free Environments

These lightweight connectors are built to thrive in environments with low to moderate vibrations and are ideal for applications where harsh winds, sand, and humidity are prevented.

Main Technical Performance Mechanical Performance Shell materials available: Aluminum alloy, stainless steel Plating options: Class B: Cadmium plating Class E: Stainless steel passivation Class F: Chemical nickel plating Contact materials: Gold-plated copper alloy for superior conductivity; available in crimp, solder, and printed circuit board configurations Mechanical lifespan: 500 mating cycles Vibration resistance: Withstands random vibrations at frequencies of 100-1000Hz with a power spectral density of 1g²/Hz Shock resistance: Handles 3ms half-sine wave with peak acceleration up to 300g Environmental Performance Temperature range: B-class (-65 ˚C to 175 ˚C), E and F class (-65 ˚C to 200 ˚C) Salt spray test results: B-class (500 hours), E class (1000 hours), F-class (48 hours) High humidity resistance: Up to 98% relative humidity at 40 ˚C Operating altitude: Up to 30,480 meters Electrical Performance Contact resistance and current rating

Contact ID	Diameter (mm)	Resistance (mΩ)	Current (A)
22D	Ø0.76	≤12	5
20#	Ø1.00	≤5	7.5
16#	Ø1.60	≤2.5	13
12#	Ø2.40	≤1.5	23

EMI shielding: Provides a minimum attenuation of 45dB from 100MHz to 1GHz

Withstanding voltage (V):

Service rating	M	Ⅰ	Ⅱ
Sea level	1300	1800	2300
21000m	800	1000	1000

Insulation resistance: ≥5000MΩ under normal conditions, ≥100MΩ under humid conditions Shell-to-shell continuity: Class B: ≤2.5mΩ, Class F: ≤1.0mΩ, Class E: ≤50mΩ