What is SIM card connector and what are the main types of SIM card connectors, their functions and characteristic features and electrical performance parameters?

SIM card connector is a kind of connector for inserting and fixing SIM card (Subscriber Identity Module), which is one of the indispensable parts in cellular phones and mobile devices.SIM card connector is mainly composed of base, card slot, contact piece and so on, and its main function is to provide the connection between the SIM card and the device to realize the data transmission, communication, identity authentication and other functions. , communication, authentication and other functions. Main types and functions: 1. Spring-loaded SIM card connector: Spring-loaded SIM card connector is also divided into side-insertion type and top-insertion type, which is characterized by the need for spring force when inserting the SIM card, so that the contact point and the contact point on the SIM card to achieve the connection. The advantage of spring-type connector is easy to install and use, and can prevent the SIM card from falling off, the disadvantage is that the stability of the connection is weak.2. Patch SIM card connector: patch SIM card connector contact point for the metal sheet or metal shrapnel, through the pressure contact to realize the connection. The advantage of patch type connector is stronger connection stability, suitable for miniaturization design in mobile devices, the disadvantage is easy to damage. Features and characteristics: 1. Mechanical properties: the number of insertion and extraction, insertion and closure force, wear resistance, corrosion resistance, etc. 2. Electrical properties: contact resistance, insulation resistance, voltage, transmission bandwidth, etc. 3. Environmental adaptability: high temperature, low temperature, waterproof, dustproof, vibration resistance, etc. SIM card connector electrical performance parameters: 1. Contact resistance: resistance between the pins and sockets, usually less than 100mΩ is required. 2. 2. Insulation resistance: the insulation resistance between the pins and sockets, usually required to be greater than 100MΩ. 3. Withstand voltage: the connector can withstand under normal operating conditions of the greater voltage value, usually 250VAC. 4. Frequency characteristics: the connector transmits the signal bandwidth and transmission rate, usually required to be as high as 10GB / s or more. Domestic and foreign SIM card connector manufacturers are: MOLEX, FCI, Amphenol, JAE, YST, Shenzhen Kangjiafei, Shenzhen Qianxingda, Shenzhen RuiTai and so on.

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