RL current rise time calculator
Calculate the time for current through an inductor to rise to a target fraction of its final value.
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TechOverflow calculators:
You can enter values with SI suffixes like 12.2m (equivalent to 0.012) or 14k (14000) or 32u (0.000032).
The results are calculated while you type and shown directly below the calculator, so there is no need to press return or click on a Calculate button.
You can enter values with SI suffixes like 12.2m (equivalent to 0.012) or 14k (14000) or 32u (0.000032).
The results are calculated while you type and shown directly below the calculator, so there is no need to press return or click on a Calculate button.
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The RL current rise time is the time required for current through an inductor to rise to a specific percentage of its final value when voltage is applied.
$$ t = -\tau \ln(1 - \text{ratio}) $$where $\tau = \frac{L}{R}$ is the time constant and the ratio is the target current as a fraction of the final current (e.g., 0.90 for 90%).
See also: How to compute RL current rise time in Python using UliEngineering
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