Cation channel that gives rise to very low constitutive currents in the absence of activation. The activated channel exhibits selectivity for sodium, and is inhibited by amiloride. Homotrimer or heterotrimer with other ASIC proteins. Detected in small intestine, duodenum and jejunum. Detected at very low levels in testis and rectum. Belongs to the amiloride-sensitive sodium channel (TC 1.A.6) family. ASIC5 subfamily.