Calculation Notes
This tool calculates the maximum current a trace can briefly carry.
Factors that influence the transient current calculation include:-
- Trace width (w)
- Trace thickness (t)
- Temperature rise (ΔT)
- Transient time (tr)
T_f = 1083 ^\circ C\; (fusing temperature of copper)
a = \frac{w \times t}{1.27324}\; (cross sectional area)
i \approx a \times \sqrt{ \frac{\log\big(\frac{\Delta T}{234+t_r} +1\big)}{335}}\; (transient current)
References:
- Electrical Circuit Theory and Technology (ISBN 978-1-85617-770-2)
- Douglas Brooks and Johannes Adams, "Fusing Currents in Traces", 2015
Disclaimer: The information and this tool are provided with no liability of any kind whatsoever, use at your own risk.