| Developed in the late 1940뭩 as a miniature version of the Type C connector,
BNC stands for Bayonet Neill Concelman and is named after Amphenol engineer
Carl Concelman. The BNC product line is a miniature quick connect/disconnect
RF connector. It features two bayonet lugs on the female connector; mating
is achieved with only a quarter turn of the coupling nut. BNC뭩 are ideally
suited for cable termination for miniature to subminiature coaxial cable
(RG-58, 59, to RG-179, RG-316, etc.)
Amphenol 50 Ω BNC connectors are miniature, lightweight units designed
to operate up to 11 GHz and typically yield low reflection through 4 GHz.
Designed to accommodate a large variety of RG and industry standard cables,
BNC connectors are available in crimp/crimp, clamp/solder, SURETWIST?
and field serviceable termination styles. A full line of printed circuit
board receptacles, bulkhead receptacles, resistor terminations, and other
accessories complement the product offering.
A variety of our 50 Ω BNC connectors are recognized under the Component
program of Underwriter뭩 Laboratories, Inc. These connectors are ideal
for use with medical equipment and test instrumentation where safety cannot
be compromised.
Amphenol also offers a full line of 75 Ω BNC connectors to meet the needs
for higher performance impedance-matched cable interconnections. These
connectors can be used in a variety of applications where true 75 Ω performance
is needed to insure low signal distortion. Designed for the most popular
75 Ω cables used in broadcast and CATV applications as well as for plenum
and other cables, these connectors feature crimp-crimp cable affixment
for quick and reliable installation.
Two distinct types of 75 Ω BNC's are available, and both mate with each
other and with 50 Ω BNC's. Type 1 is designated 75 Ω BNC-T1 and provides
constant 75 Ω performance with low VSWR DC ?4 GHz. Type 2 is designated
75 Ω BNC-T2 and is usable with low reflection DC - 1 GHz. For applications
above 1 GHz, Type 1 is recommended.
Part numbers that are listed with the appropriate M39012 number are military
grade connectors produced in accordance with and actively qualified to
the military specification MIL-C-39012. Connectors not listed with the
M39012 number constitute the industrial grade product offering. These
connectors provide comparable performance and generally feature nickel-plated
brass bodies, Teflon insulators, and either gold or silver-plated center
contacts. Amphenol뭩 commercial grade connector offering carries the part
number designation 밨FX? for easy recognition. These low-cost connectors
typically utilize die cast and molded components. While performance will
not be equal to the industrial or military grade products, these connectors
are ideal for use on a variety of commercial applications.
Reverse Polarity BNC's are also available. Reverse polarity is a keying
system accomplished with a reverse interface, and ensures that reverse
polarity interface connectors do not mate with standard interface connectors.
Amphenol accomplishes this by inserting female contacts into plugs and
male contacts into jacks. Other manufacturers may use reverse threading
to accomplish reverse polarity keying.
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