B51-328-3188220 ITT SEALECTRO, B51-328-3188220 Datasheet - Page 60

• Manufacturer Part Number: B51-328-3188220
• Description: RF/COAXIAL, SMB PLUG, R/A, 50OHM, CRIMP
• Manufacturer: ITT SEALECTRO

Specifications of B51-328-3188220

• Body Style: Right Angle Plug
• Coaxial Termination: Crimp
• Rg Cable Type: RG-174, 316
• Contact Material: Beryllium Copper
• Contact Plating: Gold
• Connector Type: SMB Coaxial
• Impedance: 50ohm
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Cannon 50 Ohm Connectors
Attenuation - Decrease in power due to resistance or
mismatch in transmission line.
Back Mounted - When applied to a coaxial connector it is
that connector mounted from the rear of a panel with
the fixing nut on the outside.
Bandwidth - Distance between two frequencies over
which a RF or microwave device is intended to work.
Between Series Adaptor - An adaptor used to connect
two different generic types of connector.
BNC - Bayonet Nut Connector.
Braid - A weave of metal strands used as an electrical
shield for an insulated conductor or group of conductors.
Bulkhead Mount - The type of connector fitted to a
chassis using a single cut-out hole.
Cable Retention - The mechanism that joins the connector
to the cable.
Cable Retention Force - The axial force which a connector
/ cable join can withstand.
Captive - A component such as a contact which is held
firmly in position.
Characteristic Impedance - That impedance at which the
transmission line is intended to work. A change from the
characteristic impedance along its length will cause
mismatch and loss of power.
Clamp - The holding of a cable by use of a screw thread
action.
Closed Entry Contact - A female contact which is
designed to prevent insertion of a contact larger than
that specified.
Coaxial Cable - A transmission line where the one
conductor is concentric inside another, often abbreviated
to “coax”.
Coaxial Termination - A resistive element used to end a
coaxial line in its characteristic impedance.
Coaxial Terminator - A device for terminating coaxial cable
to a PCB or bulkhead mount (a mechanical device and
should not be confused with coaxial termination)
Conhex - Tradename covering SMB and SMC, both in 50
Ohm and 75 Ohm impedance (discontinued)
Connector Durability - The number of times a connector
can be physically mated and still maintain its specified
performance.
Contact Resistance - The measurement of the DC electrical
resistance between a pair of mated contacts. Usually
specified as being measured after a given number of
mating cycles.
Corona - A discharge of electricity caused by the
ionisation of the air around a conductor just prior to total
breakdown or flashover.
Crimp - The action of distorting a metal tube to give
intimate contact with a conductor; a good crimp should
be gas tight and not be impacted by environmental
change.
Crimp Dies - The tool inserts which determine the shape
of the distortion to create a consistently good crimp.
Crimp Tool - The tool which holds crimp dies to apply the
necessary force.
Cross Talk - The amount of signal which may be
transferred from one signal carrying line to an adjacent
line.
Cut Off Frequency - The frequency at which the loss
exceeds a predetermined level.
Decibel (dB) - A unit of measurement of
RF power loss.
Dielectric - The insulating medium which holds the center
conductor concentric within the connector or cable.
Dielectric Constant - The electrical value of dielectric
which determines the impedance in cables or connectors
with constant diameters.
Dielectric Withstanding Voltage - The maximum voltage
that a dielectric material can withstand without failure.
Direct Solder - A common method of terminating
connectors to semi-rigid cable by soldering the cable
jacket to the connector.
Discontinuity - A dramatic change in characteristic
impedance which gives rise to a reflected wave.
Dissipation - The unused or lost energy in a system e.g.
heat.
Distortion - An unwanted change in a signal wave form.
Dummy Load - A device connected to the end of a
transmission line to absorb transmitted power and
prevent reflected energy.
Dust Cap - A mechanical device attached to the mating
face of an unmated connector to prevent ingress of
contaminants and provide protection against mechanical
damage.
Electromagnetic Compatibility (EMC) - The ability of a
device to operate within its intended environment
without being effected by or generating electromagnetic
interference (EMI).
Engagement and Separation Forces - The forces required
to mate and unmate a pair of connectors. The forces are
usually specified as a max & min for each action.
Environmentally Sealed - A connector that is provided
with seals or other devices to prevent ingress of dust,
moisture or other contaminants while mated which might
impair performance.
Flexible Cable - A coaxial cable where the outer conductor
is flexible (usually braided).
Gigahertz (GHz) - A measure of frequency representing 1
billion Hertz (cycles per second).
Impedance - See ‘Characteristic Impedance’
In-Series Adaptor - An adaptor which enables the
connection of two connectors of the same generic type.
Insertion Loss - The loss of power due to a particular
component in a transmission line (e.g. cable).
Insulation Resistance - The electrical resistance between
two conductors separated by an insulating medium.
Intermodulation - The mixing of two or more frequencies
which are not intended to mix.
Interface - The two surfaces of a connector which come
into intimate contact when the two halves are mated.
Inter-series Adaptor - See ‘Between Series Adaptor’
Isolation - The measure of interaction between two or
more transmission lines.
Jack - One half of a mating pair of connectors. The jack
interface normally goes inside the plug interface.
Mean Power - The mean value of the rate at which energy
is transmitted from one place to another.
Micro Strip - A transmission line consisting of a flat
conductor on a dielectric above a single ground plane.
(the ground plane is frequently a metalized face of the
dielectric).
Microwave - Very short electromagnetic waves.
Frequency range above 1 GHz.
MIL-C-39012 - The generic specification covering USA
Military coaxial connectors.
MIL-C-17 - The generic MIL spec covering coaxial cables.
Mismatch - The condition in which the impedance of the
source and load are not the same. This reduces power
transfer and causes reflections.
Mounting Plan - The design of the PCB or panel cut-out
used to mount the connector.
N Connector - This was the first true microwave
60
connector capable of working to 18 GHz, initially
designed for test applications.
Nanohex - Trade name covering SSMB & SSMC
(discontinued)
Noise - An external electromagnetic signal which
interferes with the desired signal.
Non-captive - A component such as a contact which does
not have a retention feature.
Passivation - This is a surface treatment applied primarily
to stainless steel. The process removes contaminating
iron particles and produces a passive surface.
Peak Power - Is the maximum power which may be
handled by a connector or cable.
Plug - One half of a mating pair of connectors. The plug
interface normally goes outside the jack interface.
POSNS - Abbreviation for “positions”.
PTFE - Abbreviation of polytetrafluorethylene. This is the
most commonly used dielectric (insulator) used in
professional coaxial connectors.
QPL - Qualified Parts List. Parts approved to
MIL-C-390 12 specification.
Receptacle - A term used to describe a connector
assembly usually bulkhead or PCB mounted.
Return Loss - A reason for loosing RF energy due to
signals being reflected due to a mismatch in a
transmission line.
RF Leakage - The RF power lost from a transmission line
or device. Measured in dB.
RG - The traditional prefix for MIL spec coaxial cables.
Screw-on - The mating action of connectors which are
joined using a screw thread (e.g. SMC)
Sealflex2
cable assembly which has a performance similar to semi-
rigid cable.
Semi-rigid Cable - A coaxial cable where the outer
conductor is a solid metal tube.
Skin Effect - The tendency of alternating currents to flow
near to the surface of a conductor; this increases
resistance and becomes more marked the higher the
frequency.
SMD - Sometimes used as an abbreviation for slide-on
variants of SMB. This is a misnomer, the
use is for Surface Mount Device.
Snap-on - A term used to describe the mating action of
SMB and SSMB connectors.
Solderless SMA - An SMA connector that can be
connected to semi-rigid cable by compressing the inner
body rather than by soldering (sometimes referred to as
semi-rigid ‘crimp’ connectors).
Stripline - A method of building a microwave circuit. The
circuitry is sandwiched between 2 ground planes.
Sometimes referred to as Tri-plate.
Teflon - DuPont tradename for PTFE.
Tensile Strength - The greatest force a device can
withstand without tearing or pulling apart. This is
frequently the method of determining the effectiveness of
a crimp.
TNC - Thread Nut Connector same size as BNC; the only
obvious difference is the coupling nut.
Tri-plate - See Stripline.
UG Symbol - Used to indicate a connector made to US
government spec.
Voltage Standing Wave Ratio (VSWR) - A way of
expressing the resultant loss of power as a result of signal
reflections due to discontinuity.
TM
- Cannon trade name for a flexible microwave
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