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What is the difference between SMA and SMC connectors? | POE
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What is the difference between SMA and SMC connectors?

In the field of RF and microwave technology, connectors play a role in connecting components and transmitting signals. Two commonly used RF connector types are SMA (subminiature A) and SMC (subminiature C) connectors. Both are designed for high-frequency applications, but they have distinct differences in design, performance, and application.
What is the difference between SMA and SMC connectors?
21 December 2024
Views: 78
In the field of RF and microwave technology, connectors play a role in connecting components and transmitting signals. Two commonly used RF connector types are SMA (subminiature A) and SMC (subminiature C) connectors. Both are designed for high-frequency applications, but they have distinct differences in design, performance, and application.

What is an SMA connector?
SMA connectors are small, threaded RF connectors used for high-frequency signals, designed to operate from DC (0 Hz) to 18 GHz. SMA connectors are known for their precision, making them a popular choice for wireless communications, test equipment, and radar systems.

What is an SMC connector?
SMC connectors are another subminiature RF connector that features a snap-on or threaded connection for applications requiring frequencies up to 10 GHz. SMC connectors are smaller than SMA connectors and are often used in compact devices with limited space.

Main differences between SMA and SMC connectors

SMA connectors use a threaded coupling mechanism that ensures a secure and vibration-resistant connection;
SMA connectors are designed to handle frequencies up to 18 GHz (some variants go even higher), making them ideal for high-frequency and precision applications;
SMA connectors are slightly larger and bulkier than SMC connectors, providing durability and allowing for precise alignment, making them suitable for test and measurement equipment.

SMC connectors come in two versions: threaded and snap-on. The snap-on version connects and disconnects faster but may not be as secure as the threaded version. The threaded SMC version provides a tighter connection but is less commonly used;
SMC connectors typically support frequencies up to 10 GHz, which is sufficient for many RF applications but is below the SMA range;
SMC connectors are smaller and more compact, making them better suited for space-constrained devices such as handheld communications devices or medical equipment.

Conclusion
While both SMA and SMC connectors are essential components in RF and microwave applications, their differences make them suitable for different purposes. SMA connectors are rugged, precise, and ideal for high-frequency applications, while SMC connectors are compact, cost-effective, and better suited for space-constrained equipment.
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