Symbol for milli, which means one thousandth.
Milliampere, or one thousandth of an ampere.
Contacts made by machining metal stock rather than by stamping and bending sheet metal.
In an optical waveguide all macroscopic deviations of the axis from a straight line.
Premium line Approved Cable Systems Sources. Vendors approved to build certain cable assemblies used by Premium line.
A rigid fiber optic component that has one region along its length that is reduced in diameter.
Magic Numbers (for Stranded Wire Packaging)
The discrete number series ( 1, 7, 19, 37, 61, 91, etc. ) for ideal close-packaging of stranded wires, which follows the formula : 3N ( N + 1) + 1 where N is the outermost layer number that surrounds completely the central wire of the stranded wire matrix or bundle. Thus 2 layers of wires about the central wire gives N = 2 and the resulting matrix then consists of a total of 19 wires or strands, one of the above magic numbers.
Switch that contains a small permanent magnet that provides a means of switching high DC loads. The magnet deflects arc to quench it.
Any time a magnetic field cuts across a conductor, or conductors pass through a magnetic field, a voltage is induced in the conductor. Electric current is always accompanied by a magnetic field. Moving charge or current always creates a static magnetic field. However, dynamically, a changing electric field creates a changing magnetic field, and vice versa.
The total magnetization of a material that arises from an external magnetic flux and an internally induced one resulting from the material itself.
A switch designed for applications that require sustained contact after the plunger has been released, but with provision for resetting.
Voltage across a neon lamp after breakdown. This voltage is at its minimum in the normal glow region. Also called holding voltage.
To close or establish an electrical circuit.
A process by which a movable contact makes one circuit before breaking the next circuit.
Multiwire Assembly Machine Checklist
Metropolitan Area Network. A network that allows LANs to communicate over a geographic area as wide as a single city and its suburbs.
Actuation of a switch by a human operator.
Manufacturers Compatibility Committee (MCC)
A group formed to provide standards of compatibility for 2.5" Hard Disk Drives (HDDs). Provides flexibility to end-users for interchanging HDDs, depending of the drive accessibility.
For hard mounting applications, the MCC specification provides standardized bottom and side mount dimensions, and their association to the header receptacle in the HDD.
This standard also outlines mounting characteristics for 2.5" HDD to the OEM system motherboard. For bottom hard-mounting of 2.5" HDD with 12.5 mm (0.5") height, the MCC specifies the nominal "Z" height as 3.99mm (.157").
Distance between reference edge of a cable and the nearest edge of the first conductor.
A glass plate with photo image, used to make integrated Circuits.
In fiber optics, a technique that permits simultaneous joining of fibers without handling individual fibers.
Method of termination in which terminals that displace flat cable insulation without stripping to cold flow mate with conductors and form a gas-tight metal-to-metal joint.
To join two connector halves in a normal engaging mode.
Any of several systems used to feed material into the manufacturing stamping process. Premium line uses two main feeding systems:
See Plating.
See Front End.
See Interface.
One of two ways of making a connection, using either a plug (also called pin, post, or lead) or a jack (also called receptacle or socket).
The engagement and separation of a male and female terminal. The maximum recommended number of mating/unmating cycles is a measure of the durability of the terminals.
The amount of force, measured in grams or pounds, required to join or separate a mated plug and receptacle. Mating/unmating force increases with number of circuits in the assembly.
A network or array of conductors arranged to facilitate rapid and convenient interconnection between them by switches, pins, jumpers, or other means.
Multistation Access Unit. A hubbing device used with Token-Ring LANs.
Automotive terminal product designed for harsh environments.
Micro Channel Architecture. A bus and interconnect standard for high-speed add-on function cards in PCs. Now being replaced by PCI.
Micro Channel Access. A 32-bit data bus architecture for personal computers.
Main Distributing Frame. In a premise wiring system, the primary frame used for cross-connecting the premises switching equipment to the backbone cabling. It is located in or near the common equipment room.
Microprocessor Development System.
Joining two fibers together by mechanical means to enable a continuous signal.
Prefix meaning million.
One million bits per second. Indicates the rate at which digital signals are processed.
One million binary digits (bits).
A measure of memory capacity. One megabyte is equivalent to a million bytes.
An older expression for one million hertz, or one million cycles per second
One million cycles per second. A measurement of the frequency of sinusoidal signal transmissions. The term is used to specify the maximum.
One million ohms.
One million watts.
A thermosetting material from the amino plastics group that is a self-extinguishing polyamid. High-grade melamine is used for molding terminal blocks.
An insulating layer with openings sandwiched between two layers of thin film that contains silver screened contacts. Sealing is done using adhesives.
Similar to standard membrane switch but incorporates stainless steel snapdomes for positive operator feedback.
The conductive path from switch to connector.
Membrane Switch Graphic Overlay
The asthetic finish added to a membrane switch to customer specifications or to a standard finish membrane switch.
By substituting a PCB. for lower film layer in the standard switch, components such as LEDs, resistors, connectors, etc. can be incorporated.
Membrane Switch Single Pole, Single Throw with Common Buss
One termination per switch and one termination common to all.
Total number of terminations equals number of switches in horizontal row plus number of switches in vertical row.
Micro Electromechanical Systems. The marriage of super small computer chips with small sensors, probes, lasers, activators, etc. These tiny motors, nozzles, valves and other mechanical systems are capable of oscillating at high frequencies and moving with high precision for miniaturization in all devices where chips are used.
A solderability test system in which the specimen is connected to equipment through a strain gauge measuring the wettability of the solder via the meniscus wetting angle on a material substrate as it is immersed in the solder and its surface tension.
A type of field-effect transistor, also called IGFET or Insulated-Gate FET.
In cylindrical bayonet connectors, the situation in which the shell surface of the receptacle bottoms, or contacts, the inside rear portion of the mating plug. This is achieved by means of an adjustable ring on the collar of the plug.
This term is used when the cylindrical portion of the contact portion of the contact (to which the wire is inserted) is partially filled with a specific amount of solder before assembly of the conductor.
One million electron volts.
A type of board-to-board connectors that connects a PCB parallel to another PCB. Also called close packaging.
