===<!--6.4.6 -->General Rules for Dimensioning of Contacts===
*'''Recommended Minimum Contact Forces at Slightly Sliding Contact Make:'''
{| <table class="twocolortable" style="text-align: left; font-size: 12px;width:40%">|-<tr>|<td>Gold </td> |<td>0.03 N</td>|-</tr><tr>|<td>Silver </td>|<td>0.1 N</td>|-</tr><tr>|<td>Tungsten </td>|<td>0.5 N</td>|-</tr>|}</table>
*'''Contact Force Recommendations:'''
{| class="twocolortable" style="text-align: left; font-size: 12px;width:40%"
*'''General Rules for Dimensioning of Contact Rivets'''
[[File:General Rules for Dimensioning of Contact Rivets.jpg|left|thumb|Figure 1: General Rules for Dimensioning of Contact Rivets]]
{| class="twocolortable" style="text-align: left; font-size: 12px;width:100%"
|-
|s<sub>min</sub>
|
|≈ 0.3 mm
|}
*'''Head diameter for electrical loads'''
For AC currents: approx. 1 – 1.5 A/mm²
For 1 A min. 2 mm head diameter
10 A approx. 3 – 3.5 mm head diameter
20 A approx. 5 mm head diameter
For DC currents: approx. 0.5 – 0.8 A/mm²
*'''Head radius R for electrical loads'''
for I < 1 A R 1,5 mm
I = 6 A R 5 mm
I = 10 A R 10 mm
I = 20 A R 15 mm
*'''Failure Probability of Single and Double (Bifurcated) Contacts''' (according to Thielecke)
Fig'''Failure Probability of Single and Double (Bifurcated) Contacts''' (according to Thielecke) {| class="twocolortable" style="text-align: left; font-size: 12px;width:100%"|-!Contact force[N] !colspan="4" style="text-align:center"|'''Single contact'''|-! !Ag!AuNi 5, Pt!Ag!AuNi 5, Pt|-|0. 04 ||1 x 10<sup>-4</sup>||2 x 10<sup>-8</sup>|-|0.1 |2 x 10<sup>-3</sup>|4 x 10<sup>-5</sup>|8 x 10<sup>-5</sup>|8 x 10<sup>-9</sup>|-|0.2|1 x 10<sup>-4</sup>|8 x 10<sup>-6</sup>|4 x 10<sup>-6</sup>|4 x 10<sup>-8</sup>|-|0.3|5.5 x 10<sup>-6</sup>|1.5 x 10<sup>-6</sup>|1.188 x 10<sup>-7</sup>|3.2 x 10<sup>-10</sup>|} <div class="multiple-images"><figure id="fig: Failure probability of a contact as afunction of the voitage">[[File:Failure probability of a contact as a function of the voitage.jpg|left|thumb|Figure 2: Failure probability of a contact as a function of the voltage (according to Kirchdorfer);Ag/Ni10; 10 mA]]</figure>
Fig. 6<figure id="fig:Failure probability of a contact as a function of the current">[[File:Failure probability of a contact as a function of the current.19jpg|left|thumb|Figure 3: Failure probability of a contact as afunction of the current (according toKirchdorfer); Ag/Ni10; F <sub>k</sub> = 0.45 N; U = 24 V]]</figure></div><div class="clear"></div>
==References==
[[Application Tables and Guideline Data for Use of Electrical Contact Design#References|References]]
[[de:Faustregeln_für_die_Kontaktdimensionierung]]