CQD340 is a three‑pole, 40‑amp molded case circuit breaker from Siemens, rated for 277/480 VAC with a 14 kA interrupting rating at 480 VAC. It is a thermal‑magnetic MCCB that provides long‑time and instantaneous trip functions and uses line‑ and load‑side lug terminals for straightforward wiring in Siemens panelboards and distribution equipment. This CQD340 is part of Siemens' CQD series, designed to protect feeders and branch circuits in commercial and light industrial electrical installations and to fit standard CQD frame enclosures.
