ECA EIA-622-B-2015 Glossary of Electrical Connector Related Terms.pdf

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1、 EIA SPECIFICATION Glossary of Electrical Connector Related Terms EIA-622-B (Revision of EIA-622-A) September 2015 Electronic Components Industry Association EIA-622-B ANSI/EIA-622-B-2015 Approved: September 3, 2015 NOTICE EIA Engineering Specifications and Publications are designed to serve the pub

2、lic interest through eliminating misunderstandings between manufacturers and purchasers, facilitating interchangeability and improvement of products, and assisting the purchaser in selecting and obtaining with minimum delay the proper product for his particular need. Existence of such Specifications

3、 and Publications shall not in any respect preclude any member or nonmember of ECIA from manufacturing or selling products not conforming to such Specifications and Publications, nor shall the existence of such Specifications and Publications preclude their voluntary use by those other than ECIA mem

4、bers, whether the Specification is to be used either domestically or internationally. Specifications and Publications are adopted by ECIA in accordance with the American National Standards Institute (ANSI) patent policy. By such action, ECIA does not assume any liability to any patent owner, nor doe

5、s it assume any obligation whatever to parties adopting the Specification or Publication. This EIA Specification is considered to have International Standardization implications, but the International Electrotechnical Commission activity has not progressed to the point where a valid comparison betwe

6、en the EIA Specification and the IEC document can be made. This Specification does not purport to address all safety problems associated with its use or all applicable regulatory requirements. It is the responsibility of the user of this Specification to establish appropriate safety and health pract

7、ices and to determine the applicability of regulatory limitations before its use. (From Standards Proposal No. 5288, formulated under the cognizance of the CE-2.0 Committee on EIA National Connector and Sockets Standards, and previously published in EIA-622-A) Published by Electronic Components Indu

8、stry Association 2015 EIA Standards surface wear. (Erosion) ACCELERATED AGING A test in which certain parameters, such as voltage and temperature, are increased above normal operating values to obtain observable deterioration in a relatively short period of time. The plotted results give expected se

9、rvice life under normal conditions. Also called accelerated life test. ACCEPTANCE TESTS Those tests deemed necessary to determine acceptability of product and as agreed by purchaser and vendor. ACCESSIBLE INSULATION DISPLACEMENT CONNECTION An insulation displacement connection in which it is possibl

10、e to access test points for carrying out mechanical tests (e.g. transverse extraction force) and electrical measurements (e.g. contact resistance) without deactivation of any design features intended to establish and/or maintain the insulation displacement connection. This accessibility mainly occur

11、s when the insulation displacement connection is enclosed in a component. ACCESSORY Mechanical devices, such as jackscrews, cable clamps, added to connector shells and other such hardware that is attached to connectors to make up the total connector configuration. ACCORDION CONTACT A type of connect

12、or contact where a flat spring is given a Z shape to permit high deflection without overstress. ACME A “square“ thread which allows for rapid coupling of connectors versus finer pitched threads. A larger cross-section of thread body makes this an extremely strong design versus the usual “v“ thread.

13、(Ref: MIL-DTL-38999 series III sometimes called the Nest. APPARENT DIAMETER (of a stranded conductor) The diameter of the circumscribing circle of the bundle of strands. ARC A discharge of electricity caused by a breakdown in dielectric; either an increase in voltage or a loss of dielectric capabili

14、ty, or a combination of both. ARC RESISTANCE The resistance of a material to the effects of a high voltage, low current arc (under prescribed conditions) passing across the surface of the material. The arc resistance is stated as a measure of total elapsed time at that voltage required to form a con

15、ductive path on the surface (material carbonized by the arc). ASPECT RATIO A ratio of length or depth of a hole to its preplated diameter. ASPERITY On a conducting material, the microscopic-level surface roughness. These surface imperfections affect the effective contact area when two contact surfac

16、es are mated with one another. ATTENUATION The reduction of average power during the transmission of a signal from the input to the output of the device under test, usually measured in decibels (dB). AVALANCHE PHOTODIODE (APD) A photodetector used in high speed, broad bandwidth fiber optic systems.

17、The avalanche feature results from the rush of electrons across a junction under a very high bias. The APD requires a much higher reverse bias and has a higher cutoff frequency than a PIN-photodiode, and therefore, at higher frequencies is a more sensitive device. AWG An abbreviation for American Wi

18、re Gauge. EIA-622-B Page 4 AXIAL DISPLACEMENT The incremental difference between an initial position and a final position resulting from a force applied along the axis of a component. AXIAL LEAD A lead wire extending from a component or module body along its longitudinal axis. AXIS The center line a

19、bout which parts of a body may be referred. 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 w

20、rap, 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

21、 cards or other panels can be plugged. These panels come in a variety of designs ranging from a PC motherboard (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 sup

22、plied 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 and/or moisture protection. BAIL A loop of wire used to

23、 prevent permanent separation of two or more parts assembled together. Example: the bail holding dustcaps on round connectors. BAIL LATCH A loop of wire formed into a bail that is used to prevent the inadvertent disassembly of two halves of a connector pair. BALANCED LINE (WAVEGUIDE) (two conductor)

24、 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 transmissio

25、n line. EIA-622-B Page 5 BALANCED WIRE CIRCUIT (DATA TRANSMISSION) One whose two sides are electrically alike and symmetrical with respect to ground and other conductors. The term is commonly used to indicate a circuit whose two sides differ only by chance. BALANCED VOTAGES Voltages relative to grou

26、nd on the two conductors of a balanced line that, at every point along the line, is equal in magnitude and opposite in polarity. 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 cas

27、e 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, CONDUCTOR That section of the terminal, splice, or contact that accommodates the conductor, without insulat

28、ion. BARREL, INSULATION The section of the terminal, splice or contact that accommodates the wire with insulation. BARREL SIZE An assigned number denoting the size of the contact barrel that accommodates the conductor. BARREL, WIRE (See BARREL, CONDUCTOR) BARRIER A section of dielectric material tha

29、t 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 o

30、ther or from ground. EIA-622-B Page 6 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. BASIS METAL Metal from which the connector, contact, or metal accessory is made and on which one or more metals or coat

31、ing may be deposited. BASE METAL (See BASIS METAL). BASIC IDENTIFICATION NUMBER (BIN) The number used to identify contacts for use in military specification type connectors, whose performance is governed by the requirements set forth in SAE AS39029. BASIS MATERIAL Material upon which coatings are de

32、posited. BASIS METAL The metal from which a connector, contact, terminal, or splice is made. BAYONET COUPLING A quick coupling mechanism utilizing pins or keys on one connector half and ramps on the corresponding connector half. (Ref: MIL-DTL-38999 Series I and II and ITT Cannons CIR.) BEAM (IDC) Th

33、e 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

34、 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 con

35、trolled environment. EIA-622-B Page 7 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

36、spring constant. BIFILAR CONTACT (TWINAX) Assembly of three contacts consisting of two inner contacts arranged parallel to one another with the third contact peripheral to, and encircling the two inner contacts, enabling termination of screened/shielded twisted pair cables. BIFURCATED Pertaining to

37、lengthwise slotting of a flat spring contact used in printed circuit card edge connectors. BIFURCATE CONNECTOR A hermaphroditic connector containing fork-shaped mating contacts. BIFURCATED CONTACT A flat contact with a lengthwise slot, the two arms of which apply contact force in the same direction.

38、 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

39、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. BLANK (PR

40、INTED 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

41、 concealed. EIA-622-B Page 8 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 attac

42、hed 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 STREN

43、GTH 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 struct

44、ure 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 t

45、o 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 pr

46、otective 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 co

47、nnection 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 wrapp

48、ing wire contacts the bound wire producing deformation in it and also locks on at least two corners of the post. EIA-622-B Page 9 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 t

49、he 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