Square D by Schneider Electric QOB120CP 20 Amp Single Pole Bolt On Circuit Breaker

Amazon

QO 20 Amp one-pole Bolt-On circuit breaker Bolt-on installation Compatible with QO load centers, CSED's and NQOD panel boards 120/240 VAC; 10,000 AIR, Weight: 6.25E-4 pounds, Manufacturer: Schneider Electric (Home Improvement)

Radwell UK

CIRCUIT BREAKER, 1P, 20A, 240VAC/48VDC; PRODUCT RANGE:QO SERIES; CURRENT RATING:20A; NO. OF POLES:1 POLE; VOLTAGE RATING VDC:48V; VOLTAGE RATING VAC:240V; CIRCUIT BREAKER MOUNTING:BOLT ON ROHS COMPLIANT: YES