Editing SMB connector

{{short description|Coaxial RF connector}}
{{For|SMB surface mount diode package|DO-214}}
{{Infobox connector
|name               = SMB
|type               = [[RF connector|RF coaxial connector]]
|image              = [[Image:SMB Connector.jpg|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    = 
|maximum_current    = 
|cable              = [[Coaxial]]
|passband           = Typically 0–4&nbsp;GHz
|physical_connector = 
}}

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

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

An SMB jack has a male center pin, while an SMB plug has a female basket.<ref>[https://web.archive.org/web/20160923121155/http://www.l-com.com/customer-service?ID=4873 Answer to a question about SMB connector genders]</ref><ref>[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]</ref>

Connectors are available for two SMB cable sizes: 
# Cable 2.6/50+75 S (3&nbsp;mm outer / 1.7&nbsp;mm inner diameter) and 
# Cable 2/50 S (2.2&nbsp;mm outer / 1&nbsp;mm inner diameter)

==SSMB-Nano==
The SSMB-Nano connector is a small version of the standard SMB connector with a 'snap-on' coupling.<ref>{{cite web |url=http://www.imscs.com/uploads/media/SSMB.pdf |title=SSMB-Nano |date= |access-date=2011-01-12 |url-status=dead |archive-url=https://web.archive.org/web/20110124205150/http://www.imscs.com/uploads/media/SSMB.pdf |archive-date=2011-01-24 |df= }}</ref><ref>{{cite web |date=2007-07-24 |title=SSMB-Nano |url=http://www.imscs.com/128.html |archive-url=https://web.archive.org/web/20130419052403/http://www.imscs.com:80/128.html |archive-date=2013-04-19 |accessdate=2011-01-12 |publisher=Imscs.com}}</ref>
# Impedance: 50 Ohm
# Operating frequency: DC–12.4&nbsp;GHz

==See also==
* [[SMA connector]], [[SMC connector]]
* [[BNC connector]], [[TNC connector]], [[N connector]]

==References==
{{Reflist|30em}}

==Sources==
* MIL-C-39012
* MIL-STD-348
* MIL-STD-202

==External links==
{{Commons category|SMB connectors}}
*[http://www.coaxplanet.com/Portals/2/RFB-200-1-179%20and%20903-575P-71S%20sized%20w_text.jpg Image of SMB and Mini SMB 75 Ω plugs]

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