Current carrying capacity

Current carrying capacity in amperes at +40°C ambient temperature

Cross-section [mm²] Cu tinned [A] Cu silver plated [A] Cu nickel plated [A] Nickel [A]
0,25 7,9 7,9 7,9 4,0
0,5 14,4 14,4 14,4 7,7
0,75 18,8 18,8 18,8 10,1
1,0 22,7 22,7 22,7 12,1
1,5 29,5 29,5 29,5 15,8
2,5 41,2 41,2 41,2 22,1
4,0 56,0 56,0 56,0 30,0
6,0 72,9 72,9 72,9 39,1
10,0 56,0
16,0 75,0
25,0 99,0
35,0 123,0
50,0 153,0

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Correction factor as a function of the true ambient temperature

Temperature [°C] Cu tinned Cu silver plated Cu nickel plated Nickel
50 0,96 0,97 0,98 0,99
60 0,91 0,94 0,95 0,99
70 0,87 0,90 0,93 0,96
80 0,81 0,87 0,90 0,95
90 0,77 0,83 0,87 0,93
100 0,65 0,72 0,85 0,92
120 0,62 0,71 0,79 0,89
140 0,5 0,61 0,71 0,86
160 0,35 0,50 0,65 0,84
180 - 0,35 0,58 0,81
200 - - 0,49 0,78
225 - - 0,35 0,74
250 - - - 0,69
275 - - - 0,65
300 - - - 0,60
325 - - - 0,55
350 - - - 0,49
375 - - - 0,42
400 - - - 0,34
450 - - - 0,27
500 - - - 0,26
550 - - - 0,25
600 - - - 0,24

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Example for a nickel conductor 1.50 mm² at +200°C

1.) Permissable current at +40°C = 15.8 A

2.) Permissable current at +200°C = 0.78 x 15.8 A = 12.32 A

The values ​​given are only theoretical values.
The actual load limit is always to be considered individually in the application.
Temperature, heat dissipation, atmosphere etc. are urgently to be considered in the measuring.