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HandWiki. Electrical Contacts. Encyclopedia. Available online: https://encyclopedia.pub/entry/33021 (accessed on 26 September 2026).
HandWiki. Electrical Contacts. Encyclopedia. Available at: https://encyclopedia.pub/entry/33021. Accessed September 26, 2026.
HandWiki. "Electrical Contacts" Encyclopedia, https://encyclopedia.pub/entry/33021 (accessed September 26, 2026).
HandWiki. (2022, November 04). Electrical Contacts. In Encyclopedia. https://encyclopedia.pub/entry/33021
HandWiki. "Electrical Contacts." Encyclopedia. Web. 04 November, 2022.
Electrical Contacts
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The content is sourced from: https://handwiki.org/wiki/Engineering:Electrical_contacts

An electrical contact is an electrical circuit component found in electrical switches, relays, connectors and circuit breakers. Each contact is a piece of electrically conductive material, typically metal. When a pair of contacts touch, they can pass an electrical current with a certain contact resistance, dependent on surface structure, surface chemistry and contact time; when the pair is separated by an insulating gap, then the pair does not pass a current. When the contacts touch, the switch is closed; when the contacts are separated, the switch is open. The gap must be an insulating medium, such as air, vacuum, oil, SF6. Contacts may be operated by humans in push-buttons and switches, by mechanical pressure in sensors or machine cams, and electromechanically in relays. The surfaces where contacts touch are usually composed of metals such as silver or gold alloys that have high electrical conductivity, wear resistance, oxidation resistance and other properties.

electrical contact mechanical pressure electrical circuit

References

  1. Section 1.6, Engineers' Relay Handbook, 5th ed, Relay and Switch Industry Association, Arlington, VA; 3rd ed, National Association of Relay Manufacturers, Elkhart Ind., 1980; 2nd Ed. Hayden, New York, 1966; large parts of the 5th edition are on line here . http://www.esterline.com/powersystems/DesignReference/RelayHandbook.aspx
  2. "Potter Brumfield kuep-11d15-24". http://www.newark.com/te-connectivity-potter-brumfield/kuep-11d15-24/power-relay-dpdt-24vdc-10a-plug/dp/17M0223. 
  3. "Contact Arc Phenomenon". Picker Components. http://www.pickercomponents.com/pdf/application%20note/Contact_ARC_Phenomenon.pdf. 
  4. Chapter 4, Volume IV, Lessons in Electric Circuits, EETech Media, retrieved June 2017. https://www.allaboutcircuits.com/textbook/digital/chpt-4/switch-contact-design/
  5. "Electrical Contact Materials". PEP Brainin. 2013-12-13. http://www.pepbrainin.com/technical-resources/electrical-contact-materials/. 
  6. Beurskens, Jack. "Contacts - Shin-Etsu Polymer Europe B.V.". https://www.shinetsu.info/contacts. 
  7. "IEEE Holm Conferences on Electrical Contacts". http://ieee-holm.org/. 
  8. Zhai, C (2016). "Interfacial electro-mechanical behaviour at rough surfaces". Extreme Mechanics Letters 9: 422–429. doi:10.1016/j.eml.2016.03.021. https://hal.archives-ouvertes.fr/hal-02307660/file/Interfacial%20electromechanical%20EML%20authors%20version.pdf. 
  9. Electric Contacts: Theory and Applications (4th ed.). Springer. 1999. ISBN 978-3540038757. 
  10. Zhai, C.; Hanaor, D.; Proust, G.; Gan, Y. (2015). "Stress-Dependent Electrical Contact Resistance at Fractal Rough Surfaces" (PDF). Journal of Engineering Mechanics 143 (3): B4015001. doi:10.1061/(ASCE)EM.1943-7889.0000967. https://www.researchgate.net/publication/277981414. 
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