Siemens Q22050CT One 50-Amp Two Pole and Two 20-Amp Single Pole Standard BreakerSiemens space saving, plug in circuit breakers are intended for use in Siemens EQ, Siemens Ultimate, ITE, and Gould load centers and meter combinations that are rated to accept type QT breakers. Check wiring diagram to confirm. To ensure the warranty on a Siemens panel is not voided, the use of Siemens breakers is required. The triplex breakers provide two single pole and one double pole breakers in half the space. These triplex, 1 2 Inch frame