Siemens Q1520 Plug In Type QT Duplex Thermal Circuit Breaker

The Siemens Q1520 QT duplex plug-in circuit breaker combines two independent 1-pole circuits in a single QT-frame duplex unit that plugs into compatible Siemens load centers, delivering 120 V AC protection at 15/20 A with a 10 kAIC interrupt rating and a thermal-magnetic trip, and it follows the one-inch width-per-pole standard common to QT breakers. This molded-case, space-saving design uses load-lug terminals for straightforward connections and is intended for use in load centers and meter combos rated to accept QT breakers, including Siemens, Murray, ITE and Gould configurations. UL listed for frequent switching (SWD) and HACR-rated for general use, the Q1520 duplex unit is designed to occupy a single panel space while protecting two circuits, making it a practical solution for dual-circuit protection in residential and light-commercial panels that require a compact plug-in option. With two independent 1-pole sections in one unit, it provides reliable, code‑compliant protection for two separate branch circuits at a 120 V rating.