Enables cation channel activity and enterobactin transmembrane transporter activity. Acts upstream of or within several processes, including detection of stimulus involved in sensory perception of pain; response to acidic pH; and response to heat. Is integral component of plasma membrane. Is expressed in cranial ganglion; dorsal root ganglion; and pectoral girdle and thoracic body wall muscle. Orthologous to human ASIC3 (acid sensing ion channel subunit 3). [provided by Alliance of Genome Resources, Apr 2022]