Circuit Breaker; Type Thermal Magnetic; Number of Poles 1; Voltage Rating 120/240 Volt AC; Current Rating 20 Amp; Interrupting Rating 10 Kiloamp; Wire Size 14 to 4 AWG (Copper/Aluminum); Mounting Plug-On; Used On BR Series Load Center; Size 2.5 Inch Length x 1 Inch Width x 3 Inch Height; Approval UL 489; Applicable Standard Federal Specification W-C375