MS3420-4

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MS3420-4 Application Field and Working Principle

MS3420-4 is a circularly shaped electrical connector designed for military and aerospace applications. It is part of a series of MIL-DTL-3420 (MS) connectors, commonly referred to as MIL-Spec. The MS3420-4 is a threaded coupling, four position signal and power connector. The connector can have electrical terminals or sockets, with a threaded connection to facilitate secure mating.

Field of Application

The MS3420-4 connector is widely used in military and aerospace applications, including in aircraft, missiles, and ground and naval vehicles. It is designed for high vibration, extreme temperature, and harsh environmental conditions. It is also used in communications and data transceivers, radar systems, surveillance systems, satellite systems, and avionics.

Principle of Operation

The MS3420-4 connector uses a threaded coupling mechanism to provide a secure and reliable connection. The male and female connectors have different threading, which prevents the connectors from being mismated. The four-position signal and power contacts are spring-loaded and firmly locked into place. The circular design prevents signal crosstalk and allows water and dust to flow out of the contacts when disconnected. The connector also provides EMI shielding to protect signals from interference.

Environmental Resistance

The MS3420-4 connector is designed to withstand some of the harshest environmental conditions imaginable. It is rated at IP 67, meaning it is dust tight and water resistant. It is tested to tolerate temperatures ranging from -55°C to +125°C, and can withstand pressures up to 150psi. The connector is also qualified for shock, salt spray, humidity, and vibration. These features make it a reliable solution for high-end military and aerospace applications.

Conclusion

The MS3420-4 connector is ideal for harsh conditions and challenging military and aerospace applications. The threaded coupling mechanism, four-position signal and power contacts, EMI shielding, and environmental resistance make it a reliable solution for such critical applications.

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