Voltage-gated chloride channel. Chloride channels have several functions including the regulation of cell volume; membrane potential stabilization, signal transduction and transepithelial transport. May be important in urinary concentrating mechanisms. Homodimer. Interacts with BSND. Forms heteromers with BSND in the thin ascending limb of Henle (By similarity). Expressed predominantly in the kidney. Belongs to the chloride channel (TC 2.A.49) family. CLCNKA subfamily.