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→6.4.6 General Rules for Dimensioning of Contacts
|≈ 0.3 mm
|}
*'''Head diameter for electrical loads'''
{| class="twocolortable" style="text-align: left; font-size: 12px;width:40%"|-|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'''
