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A Comparison Between Amerline’s AEC 3106 Connector & the MS3106 Connector

Amerline’s AEC 3106 connector is a commercial drop-in equivalent for the MS3106  connector. Delivering the same functionality, these two cable connector plugs can be used to mate to receptacles mounted on the same types of equipment to ensure reliable power source connections.

Here, we’ll take a closer look at the similarities between the AEC 3106 connector and the MS3106 connector, as well as what sets the two connectors apart.

Looking at Essential Requirements

Commercial off-the-shelf (COTS) connectors deliver on the most important functions as MS connectors. In the context of the AEC 3106 connector, that includes meeting temperature, salt spray and vibration testing requirements. In the case of salt spray, the AEC 3106 connector actually improves upon the MS (MIL-SPEC) 48-hour rating by passing 500-hour salt spray testing. 

With MS connectors, what can be considered non-essential requirements enter the picture. This can include governmental, state department and federal agency specifications that have more to do with regulatory standards than performance attributes. These added conditions contribute to higher costs, alongside the Qualified Products List (QPL) designation and shorter production runs that also pass costs on to customers.

Customization

The incentive to shift to COTS connectors is about more than cost and availability. It’s an opportunity to piggyback on military-designed standards with room for customizations that include a variety of plating finishes and accessory options.

Compared to the MS3106 connector, the AEC 3106 connector offers more finish options. Some examples of these finish options include electro-deposited black and olive drab — both of which meet the 500-hour salt spray test and are RoHS compliant. Compared to cadmium alternatives, these finishes provide a smoother, more appealing look. 

(Due to the risk and cost involved with handling and processing cadmium, the government and defense contractors have started to move away from its use. Meanwhile, in the private sector, cadmium has been banned outright for environmental reasons.)

The AEC 3106 connector can be customized with a variety of special backshells that allow for greater performance. Amerline can machine special adapters that provide effective strain relief, environmental sealing and EMI & RFI shielding. 

It’s on the back end of the connectors where problems can arise. By sealing that area, you can enable maximum environmental protection, which is ideal for welding and industrial equipment that go through rough, continuous use cycles.

Pair the Functionality You Need With Flexibility

As a commercial version of the MS3106 connector, Amerline’s AEC 3106 connector checks all the right boxes. You’ll have a design that meets military-grade standards for robustness and durability with flexibility to modify its design to meet your needs. Not to mention, you’ll experience the benefit of improved connector availability and cost.

Interested in AEC 3106 connectors for your application? Contact us for a quote.

Frequently Asked Questions About the AEC 3106 & MS3106 Connectors

What is the difference between the AEC 3106 and the MS3106 connector?

The main distinction comes down to certification. The MS3106 carries QPL status under MIL-DTL-5015, while the AEC 3106 is a COTS equivalent that offers military-grade robustness and durability without the regulatory overhead. In some areas, like salt spray resistance, the AEC 3106 actually exceeds the MIL-SPEC baseline by passing 500-hour salt spray testing.

Is the AEC 3106 interchangeable with the MS3106?

Yes, the AEC 3106 mates with the same receptacle families and is cross-compatible with Amphenol and ITT Cannon equivalents. Always confirm shell size and insert arrangement before substituting in any QPL-required or safety-critical application.

What standard does the MS3106 connector follow?

The MS3106 falls under MIL-DTL-5015, the U.S. military standard for heavy-duty circular connectors, which was transferred to SAE International in 2000 and is now maintained as SAE AS50151. The MS3106 designation specifically identifies the straight cable plug style within that series.

What receptacles does the MS3106 / AEC 3106 mate with?

Both plugs are compatible with MIL-DTL-5015 style receptacles: MS3100 (wall mount), MS3101 (cable connecting), and MS3102 (box mount). Shell size and insert arrangement must match for proper mating.

What applications use the MS3106 / AEC 3106 connectors?

Applications include anywhere vibration, moisture, temperature swings, or shock are a concern, from military ground support and shipboard systems to industrial machinery and aerospace electronics. The threaded coupling and environmental sealing make them well-suited for demanding, continuous-use environments.

Why choose a commercial connector over the MS3106?

When QPL certification isn't contractually required, COTS alternatives like the AEC 3106 offer equivalent performance with shorter lead times and lower procurement costs. They also open the door to finish and backshell customizations that aren't available on the MIL-SPEC version.

Does the AEC 3106 meet MIL-DTL-5015 performance requirements?

It meets the core performance criteria — temperature range, vibration resistance, and environmental sealing — but is not QPL-listed. Programs with contractual QPL requirements should specify the MS3106; for all others, the AEC 3106 is a strong-performing, cost-effective alternative.

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