Data Book of Electrical Contacts

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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

Electrical resistivity p of PdCu alloys.jpg
Electrical resistivity p of PdCu alloys with and without an annealing step for forming an ordered phase
Pages: Platinum Metal Based Materials,
Werkstoffe aus Platin-Metallen

by Doduco Redaktion


Direction dependence of the spring bending limit.jpg
Direction dependence of the spring bending limit of selected copper materials (Wieland)
Pages: Application Properties for the Selection of Copper Alloys,
Kenngrößen zur Bewertung der Eigenschaften von Kupfer-Legierungen

by Doduco Redaktion