213790-1

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213790-1 contacts, sometimes referred to as “multi-purpose contacts”, are electrical contacts designed for use in a wide variety of applications. They are typically used in automotive, commercial, industrial, continuous control systems, aerospace and other applications. The contact can be used for both low-voltage applications as well as high-voltage applications, and are designed to provide a reliable and safe electrical connection.

The contact designs are split into three categories based on their intended application. These categories are: general purpose (low-voltage), intermediate (high-voltage) and extreme-service (ultra-high voltage). The contact construction and design details vary based on the application they are intended for. For example, high-voltage contacts are often built with additional space between the contacts in order to prevent short circuits.

The working principle of a multi-purpose contact is the same for each type, no matter the application. It consists of two main components - a stationary contact and a moving contact. When the two contacts are in close proximity, they form a conductive path that allows electricity to flow through. When the two contacts are pulled apart, the electrical circuit is broken.

The stationary contact, also known as the contact pin, is typically made from a metal such as copper, brass or bronze. It is connected to the base of the contact and is held in place by a retaining device. The contact pin has a flat or rounded surface that reduces the likelihood of arcing.

The moving contact, also known as the movable contact, is typically made from hard-rolled steel or die-cast aluminum. It is connected to the contact arm and is able to move freely inside the contact body. This contact is spring loaded or has a counterweight to keep it in contact with the pin, ensuring a reliable connection.

When the contact arm is in motion, it makes contact with the pin and completes the circuit. When the contact arm is stationary, the circuit is broken and no electricity can flow. The spring force keeps the movable contact in contact with the pin on a consistent basis, which reduces arcing and ensures the connection stays strong.

Multi-purpose contacts provide reliable electrical connections in a wide range of applications, from low-voltage to high-voltage. By using a stationary contact and a moving contact, they allow for a safe, efficient and consistent connection.

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