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A comprehensive explanation of electronic connectors!

A comprehensive explanation of electronic connectors!

Blog | Dec 10,2022

Electronic connectors (also often referred to as circuit connectors, or electrical connectors) connect two conductor bridges on a circuit so that current or signals can flow from one conductor to another conductor device. It is widely used in various electrical circuits and plays the role of connecting or disconnecting current or signals.

This connection may be temporary and easily plugged in at any time, or it may be a permanent junction between electrical equipment or wires. As a professional connector manufacturer, LHE will give you a detailed and comprehensive introduction to electronic connectors today.

electronic connectors

1. Connector: A detachable component usually attached to a cable or device for the electrical connection of a transmission line system (except for an adapter).

2. RF connector: It is a connector used in the radio frequency range.

3. Video: Radio waves with a frequency range of 3HZ∽30MHZ.

4. Radiofrequency: radio waves with a frequency range of 3,000HZ∽3000GHZ.

5. High frequency: radio waves with a frequency range between 3MHZ∽and 30MHZ.

6. Coaxial: The inner conductor has dielectric support, and the structure can obtain the smallest internal reflection coefficient within the frequency range used in the measurement.

High frequency

7. Triax: A transmission line consisting of three layers of concentric conductors with a common axis and insulated from each other.

8. Grade: The level of the connector in terms of mechanical and electrical precision, especially in terms of the specified reflection coefficient.

9. Universal connector (level 2): ​​A connector that is manufactured with the widest allowable dimensional deviation (tolerance), but still guarantees the minimum specified performance and interpretability.
Note: The requirements for the reflection coefficient may or may not be specified.

10. High-performance connector (level 1): a connector that specifies the limit value of the reflection coefficient according to the frequency change. Usually, the dimensional tolerance specified is not stricter than that of the corresponding level 2 connector, but it is necessary to ensure that the connector meets the reflection coefficient It is the manufacturer’s responsibility to select tighter tolerances when required.

11. Standard test connector (level 0): a precision-manufactured specific type of connector used to measure the reflection coefficient of level 1 and level 2 connectors, and the error caused by the measurement results is negligible.

The requirements for reflection coefficient

Note: Standard test connectors are usually part of an adapter between different types, and the connection between the adapter and the precision connector forms part of the test equipment.


1. Sealed connector: A connector that can meet the specified gas, moisture, or liquid tightness requirements.

2. Barrier seal: A seal that prevents gas, moisture, or liquid from entering the interior of the connector housing along the axial direction.

3. Panel sealing: prevent gas, moisture, or liquid from entering the fixing or sealing between the adapter housing and the panel through the installation hole.
NOTE: Seals are usually supplied as separate products.

4. Mating surface seal: the seal that prevents gas, moisture, or liquid from entering the interface of a pair of mating connectors.

5. Hermetic seal: The seal that meets the requirements of test Qk in IEC60068-2-17 “Basic Environmental Test Procedures Part 2: Test-Test Q: Sealing”.


Zhejiang Lianhe Electronics Co., Ltd. is a professional connector cable manufacturer integrating R&D, production, sales, and service of precision connectors and wiring harnesses. It has specialized in the production and development of connectors, connecting cables, terminal cables, and injection molding cables for 20 years. , a variety of products, fully able to meet the needs of various high-end customers.

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