QO Series Circuit Breakers
QO (din rail mount) single pole thermal-magnetic circuit breakers provide overcurrent protection and switching on ac and dc systems. Plug-on (din rail mount) QO circuit breakers are for use in QO load centers, NQ and NQOD panelboards, OEM mounting bases, and Speed-D switchboard distribution panels.
QO circuit breakers snap into These breakers are UL listed for DC branch circuits up to 48 VDC (not for use in 48V systems). They can also be used for 120VAC (1-pole) circuits. They can handle one or two #14 to #10 wires or one #8 wire.