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Electrical Connectors

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About Electrical Connectors

Electrical connectors are devices that join electrical circuits together. Male connectors plug into receptacles, jacks, and outlets. Female connectors contain sockets to receive other devices. Gender changers convert female connectors to male connectors, and vice versa. A wide variety of electrical connectors are available. Many categories are based on shape (e.g., cylindrical, square, keystone) and smallest contact size. Contacts range from as small as 0.50 mm or 0.0197” to as large as 5.08 mm or 0.20”. Some electrical connectors are water resistant or designed specifically for underwater use. Others are hermetically sealed, resistant to moisture and oils, or suitable for cryogenic applications. Electrical connectors can include shielding against electrostatic discharge (ESD) and filtering for electromagnetic interference (EMI) and radio frequency interference (RFI). Common sizes for electrical connectors are standard (size 16 contacts), miniature (size 20 contacts), subminiature or high-density (size 22 contacts), and micro-miniature (size 24 contacts).

Computers use many types of electrical connectors. Edge card connectors are embedded devices that mate with the edges of single-sided or double-sided printed circuit boards (PCBs). Electrical connectors fit ribbon cables, coaxial cables, batteries, and power supplies. Strip connectors have one or more rows of contacts. Internal computer connectors link devices such as microprocessors and random access memory (RAM) slots. Other computer connections require universal serial bus (USB), Centronics, D-subminiature, or header connectors. Small computer system interface (SCSI) connectors are parallel devices that connect peripherals to computers. IEEE 1284 connectors also use a parallel port protocol. Specialty electrical connectors are used with smart cards, devices that are embedded with a microprocessor and/or memory chip. Electrical connectors are also used with personal computer (PC), CompactFlash®, and IEEE 1394 (FireWire®) cards. CompactFlash is a registered trademark of the CompactFlash Association. FireWire is a registered trademark of Apple Computer, Inc.

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Products & Services Related to Electrical Connectors

Audio Connectors
Audio connectors are used to affix cables to other audio equipment, providing electronic signal transference and grounding protection.
Circular Connectors
Circular connectors are multi-pin connectors primarily used for external interfacing.
D-subminiature Connectors
D-subminiature or D-sub connectors are sturdy electrical connectors with a mating face shaped like the letter D. They provide polarization because male and female connectors can fit together in only one way.
DIN Connectors
DIN connectors are high frequency, multi-pin, electrical connectors that meet standards established by Deutsches Institut für Normung (DIN), a German national organization for standardization. The ends of DIN connectors are round, notched, and protected by a metal skirt to ensure that pins line up correctly.
Fibre Channel Connectors
Fibre Channel connectors are high-speed connectors used in Fibre Channel systems.
Micro Connectors and Nano Connectors
Micro connectors and nano connectors exhibit contact pitches of 0.05'' (micro) and 0.025'' (nano), respectively.
RF and Microwave Connectors
RF and microwave connectors are used to connect the ends of cables in systems that operate in the radio frequency (RF) or microwave spectrum. They include threaded or bayonet-style couplings that snap, screw, or push into place.

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Engineering Web: Electrical Connectors

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Part Numbers for Electrical Connectors

Part # Distributor Manufacturer Product Category Description
19413-0065 Digi-Key Molex Connector Corporation Kits WIRERITE ELECTRICAL REPAIR KIT
2GAE1 Grainger Industrial Supply 3M Wire Connectors Electrical Spring Connector512,PK10000
2JLH7 Grainger Industrial Supply 3M Wire Terminals Electrical IDC,FlameRetardant,PK500
2JME4 Grainger Industrial Supply 3M Wire Terminals Electrical IDC Connector,PK1000
2DTL6 Grainger Industrial Supply 3M Wire Connectors Electrical Spring Connector,PK1000

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