Connector performance analysis
An important mechanical property is the mechanical life of the connector. Mechanical life is actually a durability index. It is called "mechanical operation" in the national standard GB5095. It uses a single insert and a pull out as a cycle to judge whether the connector can normally complete its connection function after the specified plug and play cycle.
The insertion force and mechanical life of the connector are related to the contact structure of the contact, the quality of the coating, and the accuracy of the arrangement and dimension of the contact.
2. the main electrical properties of electrical connectors include contact resistance, insulation resistance, and dielectric strength.
Contact resistance high quality electrical connectors should have low and stable contact resistance. The contact resistance of the connector varies from a few tens of tens to tens of ten cents.
The insulation resistance of the insulation performance indicators measure between the electrical connector contacts and contact with the shell, the order of the number of megabytes to several begohm ranging from europe.
Electrical resistance, or resistance to voltage, dielectric withstand voltage, is to describe the ability to withstand test voltage between connector contacts or between contacts and housings.
Other electrical performance.
Electromagnetic interference leakage attenuation is to evaluate the electromagnetic interference shielding effect of connectors, electromagnetic interference leakage attenuation is to evaluate the electromagnetic interference shielding effect of connectors, and is generally tested in the frequency range of 100MHz~10GHz.
For RF coaxial connectors, there are also electrical characteristics such as characteristic impedance, insertion loss, reflection coefficient, and voltage standing in Bobbi. Due to the development of digital technology, in order to connect and transmit high-speed digital pulse signal, a new type of connector is high speed signal connector, the corresponding, in terms of electrical performance, in addition to the characteristic impedance, there are some new electrical indicators, such as crosstalk delay etc..
3. environmental performance, common environmental performance, including temperature, humidity, vibration and impact, etc..
The maximum working temperature of the connector is 200 DEG C, and the minimum temperature is -65 centigrade. The operation of the connector, the current heat generated in the contact point, resulting in a temperature rise, so that the working temperature should be equal to the ambient temperature and the temperature rise and contact. In some specifications, the maximum temperature rise permitted by the connector under rated operating current is specified.
The invasion of moisture resistance will affect the insulation performance of H and rust the metal parts. Constant humidity test conditions are relative humidity 90%~95%, temperature +40 + 20 degrees, test time according to product regulations, at least 96 hours. Alternating humid heat test is more severe.
When salt resisting fog connectors work in environments containing moisture and salt, their metal structures, contacts and surface treatment layers may produce galvanic corrosion, which affects the physical and electrical performance of connectors. In order to evaluate the ability of electrical connectors to withstand this environment, a salt spray test is specified. It is the suspension of the connector in a temperature controlled test chamber, forming a salt mist atmosphere, which is exposed for at least 48 hours by the product specification.
Vibration and shock resistance, vibration resistance and impact are important performances of electrical connectors. It is an important index to check the mechanical structure of electrical connectors and the reliability of electrical contact. In the relevant methods of testing are clearly defined. The peak time, acceleration, and duration of electrical continuity shall be specified in the shock test.
Other environmental performance according to the use requirements, electrical connectors of other environmental performance, as well as sealing, low pressure and so on