1. These round connectors conform to JIS C 5432 "Circular connectors for electric appliances." Product Specifications Ratings Rated current Shell size 13 16 21 25 Number of contacts 3 5 7 10, 14 10 16 26 4 5, 16 24 Rated current 10A 5A 10A 5A 10A 5A (Crimp type: 3A) 5A (Contact numbers A and B .