Benefits of switch connector
1. Improve the production process—connectors simplify the assembly process of electronic products. It also simplifies the mass production process;
2. Easy to repair—If an electronic component fails, the failed component can be quickly replaced when the connector is installed;
3. Easy to upgrade—With the advancement of technology, components can be updated when connectors are installed, and new and more complete components can be used to replace the old ones;
4. Improve design flexibility—Using connectors enables engineers to have greater flexibility when designing and integrating new products and when composing a system with components.
The basic performance of the switch connector
The basic performance of the switch connector can be divided into three categories: mechanical performance, electrical performance and environmental performance.
Another important mechanical property is the mechanical life of the connector. Mechanical life is actually a durability indicator, which is called mechanical operation in the national standard GB5095.
It takes one insertion and one extraction as a cycle, and whether the connector can normally complete its connection function (such as contact resistance value) after the specified insertion and extraction cycle is used as the judgment basis.
1. Mechanical performance As far as the connection function is concerned, the insertion and extraction force is an important mechanical performance.
Insertion and extraction forces are divided into insertion force and extraction force (extraction force is also called separation force), the requirements of the two are different. There are provisions for maximum insertion force and minimum separation force in the relevant standards, which shows that from the point of view of use, the insertion force should be small (there are low insertion force LIF and no insertion force ZIF structure), and if the separation force is too small, It will affect the reliability of the contact.
The insertion and extraction force and mechanical life of the switch connector are related to the contact structure (positive pressure), the coating quality of the contact part (the sliding friction coefficient) and the dimensional accuracy of the contact arrangement (alignment).
2. Electrical performance The main electrical performance of the switch connector includes contact resistance, insulation resistance and dielectric strength.
① Electrical connectors with high-quality contact resistance should have low and stable contact resistance. The contact resistance of the switch connector ranges from a few milliohms to tens of milliohms.
②Insulation resistance is a measure of the insulation performance between the contacts of electrical connectors and between the contacts and the shell, and its magnitude ranges from hundreds of megohms to thousands of megohms.
③ Dielectric strength, or withstand voltage, dielectric withstand voltage, is the ability to withstand the rated test voltage between the switch connector contacts or between the contacts and the shell.
④Other electrical properties. The electromagnetic interference leakage attenuation is to evaluate the electromagnetic interference shielding effect of the connector, and the electromagnetic interference leakage attenuation is to evaluate the electromagnetic interference shielding effect of the switch connector.
It is generally tested in the frequency range of 100MHz~10GHz. For radiofrequency coaxial switch connectors, there are also electrical indicators such as characteristic impedance, insertion loss, reflection coefficient, and voltage standing wave ratio (VSWR).
Due to the development of digital technology, in order to connect and transmit high-speed digital pulse signals, a new type of connector, namely high-speed signal connector, has appeared.
Accordingly, in terms of electrical performance, in addition to the characteristic impedance, some new electrical indicators have also appeared. Such as crosstalk (crosstalk), transmission delay (delay), time lag (skew) and so on.
3. Environmental performance Common environmental performance includes temperature resistance, humidity resistance, salt spray resistance, vibration and shock resistance.
①Temperature resistance At present, the maximum working temperature of connectors is 200℃ (except for a few high-temperature special connectors), and the lowest temperature is -65℃.
When the connector is working, the current generates heat at the contact point, which leads to a temperature rise. Therefore, it is generally believed that the working temperature should be equal to the sum of the ambient temperature and the temperature rise of the contact point.
In some specifications, the maximum temperature rise allowed by the connector under the rated operating current is clearly specified.
②The intrusion of moisture resistance will affect the insulation performance of the connection h and rust metal parts. Constant heat and humidity test conditions are relative humidity 90%~95% (according to product specifications, up to 98%), temperature +40±20℃, and the test time is according to product specifications, at least 96 hours.
The alternating damp heat test is more stringent.
③When the salt spray-resistant connector works in an environment containing moisture and salt, the surface treatment layer of its metal structural parts and contact parts may produce galvanic corrosion, which affects the physical and electrical properties of the connector.
In order to evaluate the ability of electrical connectors to withstand this environment, a salt spray test is specified.
It hangs the connector in a temperature-controlled test box and sprays it with compressed air with a specified concentration of sodium chloride solution to form a salt spray atmosphere.
The exposure time is specified by the product specification and is at least 48 hours.
④Vibration and shock Vibration and shock resistance are important properties of electrical connectors.
They are particularly important in special application environments such as aviation and aerospace, railway and road transportation.
It is used to test the robustness of the electrical connector’s mechanical structure and reliable electrical contact.
An important indicator of sex. There are clear regulations in the relevant test methods. In the shock test, the peak acceleration, duration and shock pulse waveform, as well as the interruption time of electrical continuity should be specified.
⑤Other environmental performance According to the requirements of use, other environmental performances of the electrical connector include airtightness (air leakage, liquid pressure), liquid immersion (resistance to specific liquids), low air pressure, etc.
The style in the picture is a switch connector with a 19mm metal button. We also have 12mm, 22mm, 25mm, 30mm and other connectors.
For this switch connector, if you have any other questions, please contact our email directly: email@example.com or log in to our website: www.indicatorlight.com
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