Many connectors are built around established standards. But the real world often introduces unique electrical, mechanical, and environmental demands that require design modifications.

Before engaging with a connector supplier that offers custom connector design services, engineering teams should gather a few critical details about their application. The more clearly these requirements are defined, the easier it becomes for a manufacturer to step in and deliver the ideal custom connector solution.

1. What Kind of Cable or Wire Is Being Used?

Every connector interfaces with a cable or wiring system, making cable specifications one of the most important starting points for customization.

Engineering teams should be prepared to provide cable assembly details such as:

• Cable or wire type
• Wire gauge
• Voltage and current ratings
• Overall cable size or diameter

These characteristics often dictate the connector’s contact size, insert layout, and termination method.

In many cases, standard cables are the most practical choice. While custom cable designs are possible, they often require very high production minimums that may not be realistic for many programs.

Wherever a connector is used, there will always be a cable or wire involved—and that wiring system often defines many of the constraints engineers must work within.

2. What Is the Contact Count and Arrangement?

Another critical input is the number of circuits the connector must support.

Before engaging a supplier, teams should determine:

• Total number of electrical contacts
• Contact size requirements
• Power vs. signal circuits
• Required insert layout

Standard insert arrangements are available for many connector sizes, but they don’t always align with specific system requirements. In some cases, manufacturers can generate new insert layouts to better accommodate the wiring system.

For example, an application may require a size 18 military-style connector, but instead of the standard ten contacts, the design may require eleven. In situations like this, customized insert configurations may be possible while still maintaining the connector’s form factor.

3. What Level of Protection Does the Connector Need?

Environmental protection and cable management requirements also influence connector design.

Understanding the application environment helps determine whether the connector requires additional features such as:

• Overmolding
• Potting for environmental sealing
• Enhanced strain relief

The type of equipment the connector will be used in often determines these requirements. Systems exposed to vibration, movement, or harsh operating conditions may require more robust cable support and sealing solutions.

4. What Are Your Space Constraints?

Many connector customization projects begin with a simple challenge: limited available space.

Equipment platforms tend to evolve over time, and new design requirements can change the available installation envelope.

In one example involving a military vehicle platform, the original vehicle functioned primarily as a lightweight transport vehicle similar to a Jeep. It wasn’t intended for front-line operations and had relatively open internal space. Later, armor was added to the vehicle. While this improved protection, it also reduced available space inside the system.

A customer producing alternators for the vehicle needed a connector mounting solution that could fit within these new dimensional constraints. The solution required designing a rectangular flange mounting configuration to secure the connector—something not typically found on standard connector designs.

Space constraints can also affect internal connector features. For example, when connectors interface with printed circuit boards, the distance between the board and the connector mounting location determines the required length of PC board tail contacts. These contact lengths can be customized to match the required spacing.

5. Will the Connector Need to Support Grounding?

Grounding requirements can influence both connector materials and plating options.

If the connector must provide electrical grounding through the shell, a conductive finish will typically be required. This requirement may limit certain finish options.

For example, finishes such as electro-deposited olive drab (OR) and electro-deposited black (BR) are non-conductive. If grounding is required, those finishes would not be suitable for the application.

Preparing for a More Efficient Connector Customization Process

Connector customization does not always require designing an entirely new connector. In many cases, modifying insert layouts, adjusting contact lengths, or designing specialized backshells can adapt an off-the-shelf connector platform to meet an application’s needs.

With the details above in hand, manufacturing partners like Amerline can more quickly evaluate potential solutions and develop a connector configuration that integrates smoothly into the application.