Difference between revisions of "Data Book of Electrical Contacts"

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Revision as of 09:41, 7 May 2014

Featured Article

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

Rough flat surface.jpg
Rough flat surface. a) before and b) during making contact with an ideally smooth flat surface; c) Schematic of the apparent, load bearing and effective contact areas (not to scale; dashed lines are elevation lines)
Pages: Application Tables and Guideline Data for Use of Electrical Contact Design,
Anwendungstabellen und Richtwerte für den Einsatz elektrischer Kontakte

by Doduco Redaktion


Application ranges switching current and voltage.jpg
Application ranges (switching current and voltage) of contact materials for information technology and transitioning into the power switching devices
Pages: Low and Medium Electrical Loads,
Kleine und mittlere elektrische Last

by Doduco Redaktion