How To Choose The Model Of Push-type Terminal Block Connector?
When choosing a push wire terminal block model, there are several key factors to consider:
1. Size: First, confirm that the physical size of the required SD card holder matches the internal space of the tablet. Common SD card holders are available in three sizes: standard SD, microSD, and miniSD, with microSD being the most common. Measure the size limits of the installation location to ensure that the card holder can be installed smoothly.
2. Interface type: Choose the correct interface based on the motherboard design. Mainstream interfaces include push-push and push-pull. Push-push saves more space and is suitable for thin and light devices; push-pull is more durable. Also confirm whether it is a surface mount (SMT) or through-hole (THT) type.
3. Electrical characteristics: Check the operating voltage (usually 3.3V or 1.8V) and current requirements. For high-speed transmission requirements, choose a model that supports the UHS-I or UHS-II standard to ensure that the data transmission rate meets the standard. Pay attention to the anti-static (ESD) protection level, and it is recommended to choose a protection level above 8kV.
4. Durability: Evaluate the number of plug-in and unplug times. Consumer grade products are usually 5,000-10,000 times, while industrial grade products can reach more than 20,000 times. Metal casings are more durable than plastic but more expensive. Consider whether waterproof and dustproof design is required.
5. Compatibility verification: It is best to obtain samples for actual testing to check the mechanical fit and signal integrity with the target SD card. Pay special attention to the compatibility issues of SD cards of different thicknesses.
It is recommended to consult professional electronic component suppliers before the final selection, provide specific parameter requirements for the equipment, and obtain the most suitable model recommendation. Keep a certain design margin to adapt to possible specification changes in the future.
