ABB SU202M-K20 Miniature Circuit Breaker. ABB Miniature Circuit Breaker High Performance Series: SU200M 277/480Y VAC 48/96 VDC 20 A 50/60 Hz Frequency 10 kA Interrupt K-Curve Trip 2 Pole Screw Connection 18 to 4 AWG Wire IP20/IP40 Enclosure DIN Rail Mounting -25 to 55 deg C 69 mm L x 35 mm W x 111 mm H Dimensions Light Gray. Additional Description: ABB -SU202M-K20 UL489 MCB 2P K 20A 480/277. Catalog Description: Miniature Circuit Breaker Rated Current 20 Amps 2 Pole Interrupt Rating 10 kA Trip Curve K Voltage up to 277/Y480 VAC 48/96 VDC DIN Rail Mounted Finger Safe and Multi-Function Terminals UL 489 CSA 22.2 No. 5.