How do i know what size Molex pin i need?

In today's interconnected world, dependable electrical connections are the lifeblood of countless industries. Molex connectors have emerged as indispensable components due to their unparalleled reliability and adaptability across various applications.But when you choose Molex connectors,do you know what size you need?

So this article delves into the factors to consider when selecting different pins for Molex connectors.

1.Determine the Connector Series. For example, suppose you own a Molex connector that belongs to the "Mini-Fit Jr." series. It is possible to verify the series by looking up the exact series name on the connector or consulting the product manual.For instance, the Mini-Fit Jr.TM Series comprises 39000039 for crimp terminals and 39012060 for receptacle housing, among other things.

2. Examine the datasheet or paperwork: After determining the connection series—such as Mini-Fit Jr.—you should consult the datasheet or technical documents related to that series. To help you decide the necessary pin size, the datasheet will include comprehensive information about available pin sizes (e.g., 18-24 AWG).

3. Measure or Inspect the Connector: Employ a caliper or other measuring device to take a physical measurement of the pin length or diameter on the connector. When measuring, for example,Measure the diameter or length of the pins on your connector with a caliper or other measuring device. As an example, you may measure a pin's length of 10 mm or its diameter of about 1.5 mm.

4. Take into Account the Application and Requirements: Let's say your application calls for a pin with a specific voltage and current rating. Make sure the pin size you measured satisfies the requirements specified in the datasheet (e.g., appropriate current-carrying capacity) for your application.

Three typical uses for computer power supply in our daily lives are listed below:

lComputer power supplies

Pins with high current carrying capacity are usually needed for these applications. For instance, the Molex Mini-Fit Jr. connector's pins might have to manage currents of up to 12 amps per circuit, or between 9 and 12 amps,and the connector standard voltages might be anywhere from 12V to 48V or more.

lAutomotive Electronics

Depending on the specific system, automotive applications may need Molex connections with pins engineered to withstand currents of up to 20 amps.12V is the minimum required voltage for normal automobile systems; greater voltages are needed for electric vehicles or specialty systems.

lIndustrial Equipment

Although there are many different kinds of industrial applications, most industrial machinery connectors need to be able to take moderate to high currents, ranging from a few amps to 30 amps or more, as well as normal supply voltages (110 V/220 V) to higher voltage systems.

5.Speak with Molex or Distributor assistance: Get in touch with an authorized distributor or Molex's technical assistance if you have any questions or require clarification. Give them the details of the connector series or any measurements you have made. Depending on your needs, they can help determine the precise pin size and offer advice.

So you may wonder which type of Molex is the most popular?

-Fit Jr. Mini-Fit Series:

This series connetors are widely used in devices that require strong power connections, such as industrial machinery, computer power supplies, and automotive applications, come in various pin counts and have good current-carrying capacities.

-The Micro-Fit  Series 3.0:

The reliability, high density design, and small size of Micro-Fit 3.0 connections are widely recognized. When high-performance, small connectors are required, they are typically found in consumer electronics, automotive systems, and industrial machinery.

-KK® Series:

The KK Series is very versatile and can be used for a variety of electronic applications, including computer peripherals and telecommunication devices which are widely recognized for their reliability and are available in multiple configurations.

Conclusion

Even if the most popular Molex connectors are the most generally used connector series, they may vary depending on specific industries, application requirements, and regional preferences. Environmental conditions, mating cycles, spatial constraints, current/voltage requirements, and other factors typically affect selection.

The first stages in selecting the ideal connection for a particular application or project are to consider these factors and select the connector family that most closely matches the requirements of the particular use case. Datasheets, specifications, and industry standards will always be consulted before selecting the optimal Molex connector for your application.

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