SMB connector

{{short description|Coaxial RF connector}}

{{For|SMB surface mount diode package|DO-214}}

{{Infobox connector

|name = SMB

|type = RF coaxial connector

|image = 250px

|logo =

|caption = Custom SMB jack connector crimped to a 5 mm coaxial cable

|designer =

|design_date = 1960s

|manufacturer = Various

|diameter =

|width =

|height =

|electrical =

|earth =

|maximum_voltage =

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|cable = Coaxial

|passband = Typically 0–4 GHz

|physical_connector =

}}

SMB (SubMiniature version B) connectors are coaxial RF connectors developed in the 1960s. SMB connectors are smaller than SMA connectors.

They feature a snap-on coupling and are available in either 50 Ω or 75 Ω impedance. They offer excellent electrical performance from DC to 4 GHz.

An SMB jack has a male center pin, while an SMB plug has a female basket.[https://web.archive.org/web/20160923121155/http://www.l-com.com/customer-service?ID=4873 Answer to a question about SMB connector genders][https://web.archive.org/web/20190826104220/http://www.coaxplanet.com/Portals/2/SMB%20Jack%20and%20Plug%20with%20ID.jpg Image of SMB 50 Ω plug and jack illustrating the differences between the two genders]

Connectors are available for two SMB cable sizes:

1. Cable 2.6/50+75 S (3 mm outer / 1.7 mm inner diameter) and
2. Cable 2/50 S (2.2 mm outer / 1 mm inner diameter)