Complete Procedure on How to Wire a Molex Connector

December 30, 2021 3 min read

A Molex connector is a common type of connector used to power internal computer components. 

PC power cables use connectors developed by Molex Corporation to connect cables running from the power supply to various computer components. Molex connectors are generally defined by a two-piece design consisting of a male plug with a specified number of pins and a female plug with an equal number of sockets in a rectangular housing. 4 -Pin Connector

The 4-pin Molex connector is the most common PC power connector. It consists of four metal pins or sockets arranged in a row within an elongated nylon housing. This type of connector is commonly used for power fans and disk drives.

MAIN POWER

Power to a PC's motherboard is typically provided with a 24-pin Molex connector. Also known as the 24 -Pin Molex Mini -Fit Jr, this connector supplies power at multiple voltages to various components on the motherboard.

Molex Connectors are a bitunique in terms of functionality. They offer the plug and play functionality for different electronic devices. So, if you deal with electronics a lot, you’ll probably require setting these Molex connectors often.

Although the Molex 8981 connector is still used in many PCs, modern storage devices such as SSDs and SATA drives often use newer types of connectors. However, other products in the Molex family are still used in many electronic devices. Theseconnectors are not generically referred to as "Molex connectors", but have property names. Examples include the "Mini-Fit Jr." motherboard "PanelMate" connector used to power flat panel monitors.

12 Volt Connector

The +12V connector is a four-pin power connector that provides additional power for the latest processors. This connector uses 18 AWG and consists of two power wires and two COM wires. This connector is also known as the Molex 39-01-2040.

Peripheral Connector

The peripheral connector is an older standard power connector that supplies power to devices such as CPU fans or floppy drives. This cable transmits both +12 V1DC power and a +5 VDC power signal with a nominal 18 AWG. It is also known as the Molex 8981-04P.

Here’s the article presenting the complete procedure:

PROCESS OF WIRING A MOLEX CONNECTOR:

A Molex connector requires the following steps for connecting it properly.

CONNECT WIRES TO THE POWER CONNECTOR:

  1. Strip 5mm of wire insulation using the wire cutters. While cutting the wire, you have to make sure that you don’t want to go beyond the length of the crimp zone and the power connectors.
  2. Slide the exposed copper wire in the female side of the Molex power connector.
  3. Crimp the power connector with the wire to ensure that the connector fixes with the wire properly.
  4. Repeat the same procedure with the other wire you want to connect for incorporating the male power connector.

INSERT THE POWER CONNECTOR WIRES TO THE CONNECTOR HOUSING:

  1. The orientation for inserting the connector housing may differ depending upon the type of connection you need to establish. Male housing and female housing orientations are the two options available.
  2. Add the male power connector to the female housing on one side and the female power connector to the male housing on the other side. Give the connection a light tuck to check if it stays in. If the power connectors get out, there must be a problem in the crimping, and you’ll have to redo the initial steps.
  3. Put both sides of the plug together to check if your Molex connectors are working properly and your connection is ready.

SUMMING UP:

Molex connectors can provide a secure connection for the electrical settings. They don’t get out easily. Thus, ensuring that you would not have to face loose wires or faulty installations because of wire movements.


Catalog

View All
  • SOLDERSTICK WATERPROOF SOLDER WIRE CONNECTOR KIT - solderstick
    Secured and Waterproof Wiring Connections in Literally Seconds! SolderStick eliminates the hassle and allows you to focus on rewiring done the right way.
  • 300pcs SolderStick Ring/Eyelets Connector Set - solderstick
    Thick copper barrel ensures strong secure crimping every time, providing minimal voltage drop, high current flow, and less heat. These will prevent short circuits and problematic wiring that inferior connectors are known for. Insulation tubing has unique dual-walled design. High quality 3:1 shrinkage tubing has a heat-activated sealant lining to provide a 360-degree secure seal. It's flame-retardant, waterproof, and can be used underground Package includes: Total 300 PCS Heat Shrink Ring Connectors. Wire range: 22-18 ( red ) / 16-14 ( blue ) / 12-10 ( yellow ) A.W.G.  Copper barrel is an excellent conductor of electricity, corrosion resistant and has a very high melting point. These salient features will generate minimal heat while maintaining a high current flow with minimal voltage drop. COMPLIANT WITH ALL ELECTRICAL STANDARDS – SolderStick heat shrink connectors are compliant with ROHS, ISO 9001:2008, SGS and CE standards. Total: 300pcs100pcs Red(M5#10: 25pcs, M6 1/4”: 25pcs, M8 5/16”: 25pcs, M10 3/8”: 25pcs)100pcs Blue((M5#10: 25pcs M6 1/4”: 25pcs, M8 5/16”: 25pcs,M10 3/8”: 25pcs)100pcs Yellow ((M5#10: 25pcs, M6 1/4”: 25pcs, M8 5/16”: 25pcs, M10 3/8”: 25pcs) Specifications 100 RedWire range: 0.5~1.5mm², A.W.G.:22~18, Maximum current = 19A100 BlueWire range: 1.5~2.5mm², A.W.G.:16~14, Maximum current = 27A100 YellowWire range: 4~6mm², A.W.G.:12~10, Maximum current = 48A  
  • 400pcs Spade Connectors Kit - solderstick
    Thick brass in the wire connectors ensures strong secure crimping every time, providing small voltage drop, high current flow, and less heat. These will prevent short circuits and problematic wiring that inferior knockoff connectors are known for. How To Use        
  • T-Tap Wire Connectors - solderstick
    Tap into any wire with ease using our T-Type Quickconnection terminals! T-Tap Connectors are used to tap into an existing wire. Closing the quick slide connector makes a connection to the wire that can be accessed using a push-on terminal. T-Tap Wire Terminals allow you to tap an existing wire with another wire with ONE crimp and no additional connections. No wire stripping is necessary. Simply clip part over the primary wire and close with a pair of pliers No special tools are required  Taps are insulated, color coded by wire size All taps meet or exceed UL and SA standards   HOW TO USE: Simply insert both wires into the splice, squeeze down on the metal insert with pliers, and close the cap. SPECIFICATIONS: Quantity: 120 PCS Material: Nylon, Copper, Tin Maximum Operating Temperature: 221 °F Maximum Recommended Voltage Rating: 600 V Box Size: 20cm x 15cm x 5cm Package Weight: 0.35 kg PACKAGE INCLUDES: 20 x Red Connectors 20 x Blue Connectors 20 x Yellow Connectors 20 x Red T-Tap Wire Terminals 20 x Blue T-Tap Wire Terminals 20 x Yellow T-Tap Wire Terminals  
  • 164pcs Color-Coded Heat Shrink Tubing - solderstick
    ✔️ EASY AND FAST PROCESS All-in-one step solder and seal process. Shrink quickly, durable and evenly with our 2:1 shrink ratio polyolefin tubing to create a tight bond with connecting wires. ✔️ STAY ORGANIZED Our connectors come within a storage box, easy to store and carry. You can throw the heat shrink tubing kit in your toolbox and not have to worry about size getting mixed together. ✔️ ENVIRONMENTAL FRIENDLY AND SAFE Made of polyolefin, soft and flexible, acid and alkali resistance, anti-aging. This ensures that wires are tightly connected and prevents wires slipping out of the terminal. ✔️ WIDE APPLICATIONS Provide a barrier between cables and corrosive chemicals, insulate cables and wires against extreme heat in aircraft, boats, and military-grade vehicles. Suitable for electrical insulation, strain relief, cable bonding, color-coding, and identification. Specification: 60pcs 1.0 x 40mm Heat Shrink Tubing Set 30pcs 2.0 x 40mm Heat Shrink Tubing Set 20pcs 3.0 x 40mm Heat Shrink Tubing Set 16pcs 4.0 x 40mm Heat Shrink Tubing Set 12pcs 6.0 x 40mm Heat Shrink Tubing Set 10pcs 8.0 x 80mm Heat Shrink Tubing Set 8pcs 10.0 x 80mm Heat Shrink Tubing Set 8pcs 14.0 x 80mm Heat Shrink Tubing Set