RJ45 Female Connectors  8P8C 180 Degree with LED and Shield

Things we need to know in RJ45 connectors pin manufacturing

The contacts of RJ45 connectors are the core components to ensure the resistance and reliability in using. And the contact resistance is mainly affected by the contact material, the impact of vertical pressure, surface morphology, application voltage and current, and other factors.

RJ45 Female Connectors  8P8C 180 Degree with LED and Shield

1) contact material

The electrical connector of different material and technical conditions for the production of the same specifications mating contacts, contact resistance provides a different assessment indicator. Rapid separation of electrical connectors totals resistance to environmental norms GJB101-86 predetermined diameter of 1mm contact mating contact resistance of copper alloy ≤5mΩ, ferroalloy ≤15mΩ.

2) The surface pressure perpendicular to the contact surface

Perpendicular to the surface of the pressure contact means in contact with each other and perpendicular to the surface of the contact surface of the force. With vertical pressure increases, the number of contact points and the micro area is also increasing, while the contact point of transition from micro elastic deformation to plastic deformation. Resistance decreases due to the concentration, leaving the contact resistance is reduced.

The contact pressure is primarily dependent on the geometry and material properties of the contact member.

3) surface morphology

Including the design of the shape of the surface morphology and the state of the environment, the more loose surface membrane contacting surface may be due to dust, rosin, oil and other mechanical attachment in the contact surface formed by deposition, this layer of film because the table easily fitted with a particulate matter hidden in microscopic pits at the contact surface, the contact area is reduced, the contact resistance increases, and highly volatile. Second, the membrane fouling due to physical adsorption and chemical adsorption formed on the metal surface is mainly chemisorption, which is accompanied by physical adsorption after electron mobility generated. Therefore, some of the high-reliability requirements of the product, such as aerospace electrical connector assembly must be clean environmental conditions and improve the cleaning process necessary structural sealing measures, the use of units must have good storage and use of operating environmental conditions.

4) Voltage

When using the voltage reaches a certain threshold, the film will contact the breakdown, leaving the contact resistance decreased rapidly. However, due to the thermal effect accelerates the chemical reaction layer near the area of the film has some repair. So resistance is nonlinear. In the vicinity of the threshold voltage, the voltage drop will be small fluctuations in the current may cause twenty times or several times range. The contact resistance change dramatically, not to understand this error occurs when testing and useful contacts.

What’s the structure of RJ45 connector?

What is RJ45 connectors?

RJ is the abbreviation of Registered Jack, which means registered socket. And it is the interface that describes the public telecommunication network in the standards of FCC (US Federal Communications Commission).

RJ series connectors are widely used in civil, industrial, medical, communications and other fields. They have a bright future in civilian areas, such as telephone, network adapter, PC, Notebook, Router/Switch, security cameras, game consoles and other devices. Commonly, RJ connector series can be divided into RJ11, RJ14, RJ25 and RJ45 Ethernet interface (network interface).

The following numbers of RJ connector represent the number of wires. So the RJ45 connector is a standard 8-bit modular interface of a computer network. There are many ways of common saying, for example, RJ45 socket, RJ45 connector, RJ45 network port, RJ45 female socket, and so on.  Renhotec mainly offer RJ45 connector for PCB/Panel mount, and RJ45 cable.

3 Structure of RJ45 connectors

The basic structure of the RJ45 network connector always includes three parts.

  1. the contacts;
  2. insulation;
  3. the shielding case (depending on species maybe).

RJ45 Female Connector 2*6 Double Row 12 Port with Shield and Without LED

The Contacts

The contacts of the RJ45 network connector is the core functions of the parts for electrical connection. Usually, the contact pair composed of male and female contacts are mated to complete the electrical connection.

The positive contact of rigid parts, which shape is cylindrical (round pins), square column (square pin) or flat-shaped (inserts). Positive contacts generally made of brass, phosphor bronze. I.e.

As to the negative socket contact, the contact is part of the key, it relies on an elastic structure with the pin insertion timely elastic deformation force of the elastic contact member into close contact with the positive, to complete the connection.

The insulator

The insulator. Often referred insulator body, a base (base) or mounting plate (insert), its role is to make contact by location and spacing of the required arrangement, and to ensure that the contact between the RJ45 network connector member and the contact member and the housing insulation between. Good insulation resistance, voltage resistance and ease of processing are the basic requirements to select the insulating material.

The Housing

Housing. Also known as the shell (shield), the RJ45 network connector housing, which provides insulation and contacts built mechanical protection, and provides plug and socket plug timely alignment, and then secure the connector to the device.

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