In electronics, a switch is an electrical component that can break an electrical circuit, interrupting the current or diverting it from one conductor to another. Each set of contacts can be in one of two states: either 'closed' meaning the contacts are touching and electricity can flow between them, or 'open', meaning the contacts are separated and nonconducting.
A switch may be directly manipulated by a human or a sensor embedded circuit detecting or measuring physical quantities such as pressure, temperature, flow, current, voltage, force, and acceleration.
There are two common actuator type of manual triggering switches in everyday life: Biased switch and Toggle switch. A biased switch is often seen in the form of momentary push-button, either push-to-make or push-to-break the circuit. A toggle switch is a class of electrical switches that are manually actuated by a mechanical lever, handle, or rocking mechanism.
Other special types of switches include Mercury tilt switch, Knife switch, Foot switch, Reversing switch , Light switches, and Electronic switches

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A&H Sales, Inc.
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A/D Electronics, Inc.
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AA Electric
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ADR Technologies, Inc.
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Alpha Products, Inc.
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American Terminals & Fasteners
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Amperite Co.
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AMWEI Thermistor
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Ancor Products, Inc.
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APEM Components, Inc.
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Arun Electronics, Ltd.
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Associated Aircraft Supply Co., Inc.
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ATO Relays
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Brass Screws & Brass fasteners India
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BREL International
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Bryant Electric, Inc.
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c3controls
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Calgreg Electronics, Inc.
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Capital Lighting & Supply
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Carling Technologies, Inc.
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Carlton-Bates Company
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Castell Interlocks, Inc.
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Changzhou Kaili Machine &Electronic Factory
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Cole Hersee Co.
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Components Express, Inc.
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Conex Copper
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Crouzet North America
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Del City
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Digi-Key Corporation
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dna Group, Inc.
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Doig Corporation
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Don Shuhart Company
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E-Switch
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Eaton Corp. / Commercial Controls Division
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Electrical Accessories India
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Electro Sonic, Inc.
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ElectroSwitch Electronic Products
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ELMA Electronic Inc.
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Ericson Manufacturing Co.
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Erin Electrical Enterprises, Inc.
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Flame Enterprises Inc.
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Flamex, Inc.
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Flexbar Machine Corporation
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FRONTICA
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FUDA ALLOY MATERIALS CO.,LTD.
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Gaynor Electric Company, Inc., The
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GE Industrial Systems
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Gettens Electric Supply Company
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Gordon Engineering Corp.
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Grace Industries, Inc.
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Grayhill, Inc.
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Happ Controls, Inc.
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Haydon Switch & Instrument, Inc.
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Honeywell Sensing and Control
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IDEC Corporation
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IMO Precision Controls Limited
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ITT Industries, Cannon
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Jameco Electronics
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Jokab Safety North America
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Kay Pneumatics, Inc.
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KV Electronics, Inc.
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Lamb Industries, Inc.
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Leviton Manufacturing Co., Inc.
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M2B Tech
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Marlin P. Jones & Assoc. Inc.
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Marquardt Switches, Inc.
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Marshall E. Campbell Co.
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Milspecwest, LLC
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Morris Products, Inc.
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Mosier Fluid Power, Inc.
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MY Brass Components India
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Newark InOne
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NKK Switches
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Nu-Lite
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OnlineComponents
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OTTO Controls
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Pilz Automation Safety L.P.
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Pinnacle Systems, Inc.
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Pollak Engineered Products Group
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R.P.S. Inc.
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Ram Electrical Works - Electric Contractor in Thane and Mumbai
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Rapid Keypads
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Renco, Inc.
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Rockingham Electrical Supply Company, Inc.
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Sapcon Instruments
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Schaltbau Electric America
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Schuster Electronics, Inc.
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Senior Industries
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SMC Electric Supply
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Square D/Schneider Electric
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State Tool and Manufacturing Co.
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Stewart Ergonomics, Inc.
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STI
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Strategic Switch & Audio
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Superior Electric Supply Co.
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Target Electronics, Inc.
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Therm-O-Disc, Inc.
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TOWARZYSTWO ELEKTROTECHNOLOGICZNE QWERTY
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Trumen Technologies Pvt Ltd
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United Switch Corporation
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