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

Strain hardering.png
Strain_hardening of Cu-ETP by cold working
Pages: Wiki der elektrischen Kontakte
by Doduco Admin


Strain hardening of internally oxidized Ag SnO2 88 12P.jpg
Strain hardening of internally oxidized Ag/SnO2 88/12P by cold working
Pages: Silver Based Materials,
Werkstoffe auf Silber-Basis

by Doduco Redaktion