YC-20-2C YuCo DIN RAIL MINIATURE CIRCUIT BREAKER 2P 20A C CURVE 277/480V 50/60Hz TUV UL 1077 EUROPEAN DESIGN CSA C22.2 3rd Party Certifier. UL1077 CSA C22.2. Tested & Certified by TUV Rheinland. Record # 17048084-001. C Curve 2 Pole 20 Amp 277/480V