Difference between revisions of "Data Book of Electrical Contacts"

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Latest revision as of 16:18, 26 September 2014

Welcome to our Wiki of electrical contacts

The basis of this Wiki is the 2012 issue of the "DODUCO Data Book of Electrical Contacts" which is also available in printed form.
To get your desired information, please use:

For further questions or help, please contact us directly under Contact DODUCO


Featured Article

Contact Physics – Formulas

Contact Physics – Formulas

  • Constriction resistance
R_e = \rho/2a

(Single spot contact according to Holm; circular touching spot between clean

contact surfaces)

R_e = \rho/2Na

(Multi-spot contact according to Holm without influence between the N

individual spots)

R_e = \rho/2 x \sum a_i + 3 \pi \rho /32N^2 x \sum \sum (s_ij) i \neq j

(Multi-spot contact according to Greenwood considering the influence between

the spots)

  • Contact resistanc...

Featured Files

Relation between the breaking currents of relays and electrical life requirements of switching systems.jpg
Relation between the breaking currents of relays and electrical life requirements of switching systems
Pages: Test Procedures for the Communications Technology,
Prüfverfahren in der Informationstechnik
by Doduco Redaktion


Examples for percussion welded contact parts.jpg
Examples for percussion welded contact parts
Pages: Attachment of Single Contact Parts,
Bestückung von Einzelkontakten
by Doduco Redaktion


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