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Backplane Connectors - Hard Metric, Standard

Backplane connectors are the types of connectors used to mechanically connects two printed circuit boards together, which form a continuation between them. They are mainly designed to enable an efficient electrical connection onto a backplane. In this article, we are going to focus on two types of backplane connectors – hard metric and standard.

Hard metric backplane connectors are mainly used in the European and the Asia Pacific regions. These connectors have a specific format (shape and size) which is based on metric measurements and is clearly defined by the European standards. It’s also worth noting that hard metric backplane connectors offer extra features such as higher pin count, power routing and differential pairs.

Let’s take a look at some of the characteristics of this type of backplane connector:

• Female and male contacts.
• 1.27mm contact pitch.
• Compliant pin/cavity structure.
• Coaxial and dual row versions.
• Compatibility with IEEE Std 12300, IEC 1052.

The main application field of hard metric backplane connectors is in industrial automation and small form-factor server boards. They provide reliable connections, accuracy and strong mechanical performance. It’s worth noting that newer developments of hard metric backplane connectors feature polarization, which reduce mating and unmating forces, while preventing mistakes related to wrong direction of mating.

Standard backplane connectors refer to the type of connectors used in industry-standard metrics. These connectors are in use for decades and have been further developed to include features such as polarization, direct trace and even airflow management. The basic format, which is based upon the 1.27mm 4x4 contact pin pattern, has proven to be effective and reliable.

Let’s take a look at some of the characteristics of this type of backplane connector:

• Female and male contacts.
• Standardized contact pitch.
• Composite or combination housings.
• Tier rates of 4, 8, 12 and more.
• EBT (extended backplane technology).

The working principle of standard backplane connectors is the same as with other connectors, which is – reliable contacts between two separate printed circuit boards. Its main application field is in various industries such as telecommunications, aerospace, military and medical. Standard backplane connectors ensure reliable high-speed transmission, while providing data integrity and uniformity.

To conclude, both hard metric and standard backplane connectors are reliable and efficient components used in all sorts of industrial applications. Hard metric connectors offer extra features and accuracy, while standard backplane components are used as a reliable solution in various industries.

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