Eaton CHQ145 Thermal Magnetic Circuit Breaker - UL 489

Compact footprint and single-pole design keep a full protection job simple. The CHQ145 occupies only one 3/4-inch space, delivering space savings in crowded load centers and enabling easy retrofits without disturbing adjacent breakers. This is ideal for Type CH Loadcenters used in residential or light commercial panels where panel density matters and consistent slot spacing is critical. Voltage and current ratings translate to predictable performance. With a 45 A rating and 120/240 V operation, the CHQ145 supports common branch circuits while the 10 kAIC interrupt rating provides robust fault clearance. In real-world installations, this reduces nuisance trips and improves overall system uptime in lighting, outlets, and small equipment circuits. Classifier and compatibility deliver throughput benefits. As a 'Type CHQ 3/4-Inch classified replacement breaker,' it fits CH Loadcenters and replaces Square D Type QO breakers in select configurations. Engineers appreciate the straightforward wiring scheme (one #14-8 AWG and two #14-10 AWG Cu/Al) and the 2.5 in length, 0.8 in width, and 3 in height for predictable mounting. Ground fault feature adds safety value. The CHQ145 includes ground fault capability, which enhances protection for circuits that serve personnel or sensitive equipment. This reduces risk in industrial control panels and kitchens, labs, or service entrances where GF protection is required. Quality and compliance support maintenance planning. UL 489 certification confirms adherence to low-voltage breaker standards, and the unit carries Eaton's limited lifetime warranty for residential use and a 1-year commercial warranty. The combination of compact form, familiar CH load center compatibility, and robust construction minimizes maintenance costs and extends panel life.