66741-5 Connectors, Interconnects

66741-5 Application Field and Working Principle

66741-5 is a type of multi-purpose contact element developed by the International Electrotechnical Commission (IEC). It is the standard for the contact size, shape, and configuration of contact elements that will be used in a high current circuit. It specifies the number of contact surfaces needed for a circuit to be considered compliant with the IEC 66741-5 standard. By meeting the requirements, an electrical assembly can meet stringent safety and reliability standards. Additionally, it provides a uniform measuring system for the electrical current needed to properly carry out tasks in a circuit.

66741-5 contact elements are typically small metal pins or rods that securely connect an electrical circuit. These contact elements can be inserted into metallic or non-metallic material. Generally, these contact elements are made of copper and are plated with nickel or silver to improve contact resistance and provide additional protection against corrosion.

The contact elements are designed to be inserted into a mating socket before the current is applied. This causes the strain relief in the contact element to be compressed between the mating surfaces of the socket and the contact element. As the current is increased, the electrical force that exists between the contact surfaces of the contact element is strong enough to create a bond that is resistant to vibration and shock.

The configuration of the contact element can vary depending on its application. Common sizes are two, three, four, or five contact surface models. When fitting the contact element, the associated socket should be wide enough to provide a good connection and have a minimum of 1/8” of space between each contact surface. Care must be taken not to force the contact element into the socket.

In addition to providing a reliable connection between a power source and a load, 66741-5 contact elements also provide protection against electric shock for the powered equipment. The contact element is designed to break the connection in the event of a failure or overcurrent, ensuring that the power source is automatically disconnected from the load.

66741-5 contact elements are found in a variety of applications, including mobile phones, computer equipment, electrical wiring, industrial equipment, avionics, solar cells, and lighting systems. They are also used in medical monitors, power supplies, transformers, overload relays, and control switches. 66741-5 contact elements are used in devices that use high-power currents and many have been modified to fit into sockets that receive the connector with full insertion.

66741-5 contact elements are ideal for use in equipment that requires reliable and safe electrical connections. Their standard size and five-contact configuration make these contact elements suitable for a wide range of applications. By meeting the stringent IEC 66741-5 standard, they offer peace of mind that they can be used confidently in circuits with high current load requirements.