Data Book of Electrical Contacts

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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

Typical contact shapes of tips and formed contact parts.jpg
Typical contact shapes of tips and formed contact parts
Pages: Manufacturing of Single Contact Parts,
Herstellung von Einzelkontakten

by Doduco Redaktion


Softening of CuSn8 50.jpg
Softening of CuSn8 after 3 hrs annealing after 50% cold working
Pages: Naturally Hard Copper Alloys,
Naturharte Kupfer-Legierungen

by Doduco Redaktion

Starthilfen