## ampere, $$\text{A}$$

https://doi.org/10.1351/goldbook.A00300
The ampere, symbol $$\text{A}$$, is the SI unit of electric current. It is defined by taking the fixed numerical value of the elementary charge e to be 1.602 176 634 x 10E-19 when expressed in the unit C, which is equal to A s, where the second is defined in terms of ΔνCs.
Source:
BIPM, The International System of Units, SI Brochure, 9th ed. (2019) (http://www.bipm.org/en/publications/si-brochure/)