What Are SMB Connectors

SMB connectors (Sub-Miniature version B) are a type of coaxial connector used in telecommunications and networking applications. They are similar to SMA connectors, but are smaller in size and quick snap on coupling mechanism , and they are often used to connect cables, antennas, and other components in RF systems. SMB Connectors in compliance with IEC60169-10 standard and MIL-STD-348. The other 75 ohm version of SMA are Mini-SMB - 75 ohm (same size as standard SMB) andSMZ Connector - 75 ohm, also named as "True 75 ohm SMB connector," which can’t mate with SMB or Mini-SMB. Also, the FAKRA connector utilize SMB connector with plastic housing to provide stable connection and quick connect /disconnect mechanism which widely used in automobile industry.

SMB Connector Interface

SMB connectors have a 50 ohm impedance and are designed to operate at frequencies up to 4 GHz and extend frequency to 10GHz. They are available in male and female versions, with the male connector having a socket and the female connector having a male pin. SMB connectors are typically used in applications where a small, high-performance connector is required, such as in cell phones, GPS systems, and wireless networking equipment.

There are several different types of SMB connectors, including straight and right-angle connectors, as well as versions with different mounting options such as flange mount, rear bulkhead mount. SMB connectors are also available in a variety of different lengths and configurations to suit different applications.

SMB connectors are made from a variety of materials, including brass, stainless steel, and PTFE. The choice of material depends on the specific requirements of the application, such as the operating frequency and environmental conditions. Due to SMB is snap on coupling mechanism, we should use beryllium copper or phosphor bronze for inner contact to make sure the retention force of SMB connectors.