How to choose a circular electrical connector? What if something goes wrong?

  The circular electrical connector is a low-frequency electrical connector with 9 shell numbers, 4 contact specifications, and 32 hole positions, ranging from 1 hole to 62 holes. The bayonet-type quick connection system is easy to operate, reliable in connection, and resistant to vibration and impact. Five keyway positioning, with blind insertion and misoperation prevention functions. The high-reliability hyperboloid spring hole makes the connector soft to plug in and out, with low contact resistance and reliable operation.

  How to choose circular electrical connectors:

  1. Electrical parameter requirements

  Connectors are electromechanical components that connect circuits, so when selecting a connector, you must first consider the electrical parameters of the connector itself.

  2. Rated voltage

  The rated voltage, also known as the operating voltage, mainly depends on the insulating material used in the connecting machine and whether the distance between the contact pairs is large or small; some components or equipment may not be able to perform their intended functions when the voltage is lower than their rated voltage.

  3. Connector rated voltage

  In fact, it should be understood as the high working voltage recommended by the manufacturer. In principle, the connector can work normally under the rated voltage. The rated voltage generally tends to be reasonably selected based on the withstand voltage (electrical strength) index of the connector and the requirements of the use environment and safety level. In other words, the same withstand voltage index can use different maximum working voltages according to different usage environments and safety requirements. This is also consistent with objective usage.

  4.Rated current

  The rated current is also called the operating current. Like the rated voltage, when the current is lower than the rated current, the connector can work normally. During the design process of the connector, the rated current requirements are met through the thermal design of the connector, because when current flows through the contact pair, the contact pair will generate heat due to conductor resistance and contact resistance. When its heat exceeds a certain limit, it will destroy the insulation of the connector and soften the surface coating due to contact, leading to failure. Therefore, to limit the rated current, it is actually necessary to limit the temperature rise inside the connector to not exceed the design specified value.

  At present, circular electrical connectors have been widely used in daily life. Due to the small size and precise design of these devices, various situations often arise during use. For some common faults, we also need to do corresponding analysis and come up with solutions:

  Temperature resistance: The current maximum operating temperature of circular connectors is 200°C (except for a few high-temperature special connectors), and the low temperature is -65°C. When the connector is working, the current generates heat at the contact points, causing the temperature to rise. Therefore, it is generally believed that the operating temperature should be equal to the sum of the ambient temperature and the temperature rise of the contact point. In some specifications, the maximum allowable temperature rise of circular connectors under rated operating current is clearly specified.

  The intrusion of moisture-proof performance will affect the insulation performance of connection H and corrode metal parts. When salt spray-resistant circular connectors operate in an environment containing moisture and salt, the surface treatment layer of the metal structural parts and contacts may produce electrochemical corrosion, thereby affecting the physical and electrical performance of the circular connector. Resistance to vibration and shock Vibration and shock resistance are important properties of electrical connectors, especially in special application environments such as aerospace, railway and road transportation. It is an important indicator for testing the mechanical structural robustness and electrical contact reliability of circular electrical connectors.

  Other environmental properties: Depending on the usage requirements, other environmental properties of circular electrical connectors include air tightness (air leakage, liquid pressure), liquid immersion (resistance to bad habits of specific liquids), low air pressure, etc.