Connectors 101

Connectors 101

# A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
There are currently 66 names in this directory
Back Mounted
Installed such that the connectors mounting flange is positioned behind the connector mounting surface when viewed from the mating face or front side of the connector.

Backplane
An interconnection device having terminations, such as for wire wrap, on one side and usually having connector receptacles on the other side, used to provide point to point electrical interconnections between connector termination elements. The point to point electrical interconnections may be printed wiring.

Backplane Panel
An interconnection panel into which PC cards or other panels can be plugged. These panels come in a variety of designs ranging from a PC mother board (backplane) to individual connectors mounted in a metal frame. Backplane panels lend themselves to automatic wiring.

Backshell
A connector accessory or component, that may or may not be supplied with the connector, attaches to the back of the connector, can facilitate wiring harness strain relief, tighter harness routing in restricted space, and wiring shield termination, and can provide for shielding from electrical interference or positive moisture protection.

Bail
A loop of wire used to prevent permanent separation of two or more parts assembled together. Example: the bail holding dustcaps on round connectors.

Balanced Line (Waveguide)
(two conductor) A transmission line consisting of two conductors in the presence of ground capable of being operated in such a way that the voltages on the two conductors at all transverse planes are equal in magnitude and opposite in direction. The ground may be a conducting sheath, forming a shielded transmission line.

Bandwidth
The frequency range of electrical signals transmitted.

Bandwidth (3-dB)
The bandwidth between half power points. The frequency of half-power transfers in the case of baseband signals.

Barrel Chamfer
The flared entrance or internal bevel at the wire entry of the contact termination element, that is intended to facilitate entry of the conductor.

Barrel Size
An assigned number denoting the size of the contact barrel that accommodates the conductor.

Barrel, Conductor
That section of the terminal, splice, or contact that accommodates the conductor, without insulation.

Barrel, Insulation
The section of the terminal, splice or contact that accommodates the wire with insulation.

Barrel, Wire
(See BARREL, CONDUCTOR)

Barrier
A section of dielectric material that insulates contacts or terminals from each other and from ground.

Barrier Seal
A seal provided through the connector between housing, insert, and contacts to inhibit the ingress of contaminants.

Barrier Strip
A continuous section of dielectric material, that insulates electrical circuits from each other or from ground.

Base Material
A material from which the connector or contact components are made and on which one or more metals or coatings may be deposited.

Base Metal
(See BASIS METAL).

Basis Metal
Metal from which the connector, contact, or metal accessory is made and on which one or more metals or coating may be deposited.

Bayonet Coupling
A quick coupling mechanism utilizing pins or keys on one connector half and ramps on the corresponding connector half. (Ref: MIL C 38999 Series I and II and Veam's CIR.)

Beam (IDC)
The specially shaped metallic parts of an insulation displacement termination positioned on each side of the slot.

Bellied Mouth
(See BARREL CHAMFER)

Bellmouth
A flared or widened entrance of a contact or connector that allows easier insertion. Normally used on test connectors; also used to facilitate blind mating.

Bellows Contact
A connector contact, that is a flat spring, folded to provide a uniform spring rate over the full tolerance range of the mating unit.

Benign Environment
A term referring to kind and/or favorable conditions that cause little or no effect or degradation on an item; a controlled environment.

Beryllium Copper
The alloying and hardening of copper with the addition of the metal beryllium. This alloy is used extensively for electrical contact base metal because of its hardness and ability to withstand numerous flexures without relaxation or loss of its spring constant.

Bifilar Contact (TWINAX)
Assembly of three contact consisting of two inner contacts arranged paralled to one another with the third contact peripheral to, and encircling the two inner contact, enabling termination of screened twisted pair cables.

Bifurcate Connector
A hermaphroditic connector containing fork-shaped mating contacts.

Bifurcated
Pertaining to lengthwise slotting of a flat spring contact used in printed circuit card edge connectors.

Bifurcated Contact
A flat contact with a lengthwise slot, the two arms of which apply contact force in the same direction.

Binding Post
A fixed terminal of the type to which conductors are connected by means of mechanical compression.

Birdcage
A defect in stranded wire where the strands in the stripped portion between the insulated covering wire and a soldered connection (or an end tinned lead) have separated from the normal lay of the strands.

Bit Period
The time interval between the successive like edges of the clock signal (rise to rise or fall to fall). This is the reciprocal of the clock frequency.

Blade Contact
A solid contact with a rectangular cross section, usually with a chamfered mating edge.

Bland (Printed Circuit)
An unprocessed or partially processed piece of base material or metal clad base material, cut from a sheet or panel and having the rough dimensions of a printed board.

Blind Mate
Allows both connector halves to be joined in a normal engaging mode when either one or both connectors are concealed.

Blister
A localized swelling and separation between any of the layers of a laminate base material, or between base material and conductive foil or protective coating. (It is a form of delamination.)

Board Mounted Connector
A connector suitable for being permanently attached to a printed wiring board.

Board Thickness
The overall thickness of the base material and all conductive materials deposited thereon.

Body, Connector
The main portion of a connector consisting of the housing and insulator/insert assembly to which contacts and accessories are attached.

Bond Strength
The force per unit area required to separate two adjacent layers of a printed circuit board by a force applied perpendicular to the board surface.

Bonded Assembly
A connector assembly in which the components are bonded together using an electrically appropriate adhesive in a sandwich like structure to provide sealing against moisture and other environment, which weaken electrical insulating properties.

Bonding Conductor
A cable or strap that provides an electrical path for the purposes of providing a current path for safety and/or shielding grounds, to prevent shock or spark hazards, and to provide a low impedance path for EMI/RFI.

Bonding Connector
A device used to connect exposed metal to ground. It normally carries no current, but is used as a current path to eliminate shock or spark hazards and insure the operation of circuit protective devices in the case of breakdown.

Boot
A protective covering or connector accessory, usually made of a flexible or semi rigid insulation material, designed to house wire/cable terminations as a protective device, facilitate harness direction, and provide a moisture seal when bonded or used as a potting form.

Bound Connection
An electrical connection between a wire and a sharp-cornered post in which the wire is laid parallel to the length of the post and adjacent to its wider face. The wire is secured to the post by tightly wrapping several turns of a separate solid wire around the post and the wire to be secured. Each turn of the wrapping wire contacts the bound wire producing deformation in it and also locks on at least two corners of the post.

Bow
The deviation from flatness of a board characterized by a roughly cylindrical or spherical curvature such that, if the board is rectangular, its four corners are in the same plane.

Box Mount
A connector designed to be mounted in a panel or box where no accessories will be mounted on the rear of the connector. This type of connector will not have rear accessory threads.

Braid
A woven or braided sheath made from conductive or nonconductive material, used as a covering for an insulated conductor or group of insulated conductors. When flattened it may be used as a grounding strap.

Branch Connector
A connector that joins a branch conductor to the main conductor at a specified angle.

Brass
An alloy of 50 to 90 percent copper and 5 to 50 percent zinc. Used to manufacture electrical contact elements. This material has a hardness, which is greater than copper but less than beryllium copper.

Breakaway Connector
A connector designed to separate when a specified force is applied to the cable, without damage to the cable or the connector.

Breakdown Voltage
The electrical potential necessary to cause the passage of a specific electric current through an insulator or insulating material.

Breech-Lock Coupling
A quick coupling mechanism utilizing rifle breech style machined valleys and plateaus on each half of the connector pair to facilitate and maintain coupling. (Ref: MIL-C-38999 Series IV.)

Bridging, Electrical
The formation of a conductive path between conductors.

Buffer, Fiber
A layer of material, which is used to provide mechanical protection for the optical fiber.

Bundle
A group of wires fastened or held together by auxiliary means such as straps, ties, clamps, lacing tape/twine or flexible wrappings (jackets) or sheaths, also called "cable."

Busing
The joining of two or more circuits to provide a common electrical connection.

Butt
To join two conductors together end to end without overlap, with their axes being collinear.

Butt Contact
A mating contact configuration in which the mating surfaces engage end to end but do not overlap, with their axis in line.

Butt Splice
A device for joining conductors end-to-end with their axis in line and not overlapping. (See SPLICE)

Butting Connector
A connector, that is basically cylindrical and has a mating face with a basically circular periphery.

Butting Dies
Crimping dies so designed that the opposing die faces touch at the closed condition of the crimping cycle. Also called "bottoming dies."

Button Board Connector
A set of compressed, randomly crumpled, springy, highly conductive wire elements shaped in the form of a thick buttons, housed in a connector body to form a multiple of pressure butt-type contacts.

Button Hook Contact
A contact with a curved, hook-like termination often located at the rear of hermetic headers to facilitate soldering or desoldering of leads.

Button Hook Terminal
(See TERMINAL, HOOK)