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|World precisim manufacture with the three major performance|
|[ Release Time：2017/11/15 Read：2444Second ]|
World precisim manufactures used in our everyday life come in a variety of forms and with a wide range of interface models, but are inseparable from any World precisim manufacture that has all three of these features and are also RF Coaxial Connectors Essential nature of the device. Next, let's look at what are the three major features of this World precisim manufacture.
1, mechanical properties
Mechanical properties With regard to the connection function, insertion and removal forces are important mechanical properties.
Plug into and out of force into the pull-out force, the two requirements are not the same. In the relevant standards have the maximum insertion force and minimum separation force provisions, which shows that the insertion force is small, and the separation force is too small, it will affect the contact reliability.
World precisim manufacture insertion and removal forces and mechanical contact with the contact structure of the contact surface coating quality and contact size accuracy.
2, electrical performance
Electrical performance The main electrical properties of the connector include contact resistance, insulation resistance and dielectric strength.
① contact resistance High-quality electrical connector should have a low and stable contact resistance. The contact resistance of the connector varies from a few milliohms to tens of milliohms.
② Insulation resistance Electrical connectors and contacts measured between the contact between the insulation properties of the index indicators, the order of magnitude of several hundred megohms to several thousand megohms.
③ Dielectric strength or withstand voltage, dielectric withstand voltage, is to characterize the ability to withstand the rated test voltage between the connector contacts or between the contacts and the housing.
④ other electrical properties.
Electromagnetic interference leakage attenuation is to evaluate the connector electromagnetic interference shielding effect, electromagnetic interference leakage attenuation is to evaluate the connector electromagnetic interference shielding effect, usually in the 100MHz ~ 10GHz frequency range of testing.
World precisim manufactures, there are characteristic impedance, insertion loss, reflection coefficient, voltage standing wave ratio and other electrical indicators. Due to the development of digital technology, in order to connect and transmit high-speed digital pulse signals, a new type of connector, that is, a high-speed signal connector has appeared. Correspondingly, in addition to the characteristic impedance, some new electrical indexes , Such as crosstalk delay.
3, environmental performance
Environmental Performance Common environmental properties include temperature, humidity, vibration and shock.
① temperature resistance The maximum connector operating temperature of 200 ℃, the minimum temperature of -65 ℃. As the connector work, the current heat at the contact point, leading to temperature rise, it is generally considered that the operating temperature should be equal to the sum of ambient temperature and contact temperature rise. In some specifications, the maximum allowable temperature rise of the connector at the rated operating current is clearly defined.
② Moisture moisture intrusion will affect the connection h insulation performance, and rust metal parts. Constant hot and humid test conditions for the relative humidity of 90% to 95%, temperature +40 ± 20 ℃, the test time according to the product, at least 96 hours. Alternating hot and humid test is more stringent.
③ salt-resistant connectors In the work environment containing moisture and salt, the metal structure, contact surface treatment layer may produce electrochemical corrosion, affecting the connector's physical and electrical properties. To evaluate the ability of an electrical connector to withstand this environment, a salt spray test is specified. It is the connector hanging in a temperature-controlled chamber, the formation of salt spray atmosphere, the exposure time by the product specification, at least 48 hours.
④ vibration and shock Vibration and shock resistance is an important connector performance, it is to test the mechanical structure of the electrical connector ruggedness and reliability of an important indicator of electrical contact. In the relevant test methods have clear provisions. Impact tests shall specify the peak acceleration and the duration of the electrical continuity interruption.
⑤ Other environmental performance According to the requirements of use, other environmental performance of the electrical connector as well as tightness, low pressure and so on.