*'''Head diameter for electrical loads'''
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|-
|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''' {| class="twocolortable" style="text-align: left; font-size: 12px;width:40%"|-|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)
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