Plug-in type breakers are the most economical breakers on the market. They are designed for residential applications or light office. If you have a problem with one, it is recommended to change out the breaker and install a new one. Available in 1 Pole, 2 Pole and 3 Pole and even twins or duplex type or two in on unit. Molded case circuit plug-in breakers for panelboard mounting with insta-wire in 3 types of tripping speed Q=10KA, QH=22KA. Available in versions 1 pole 120vac, 2 poles common trip 120/240vac, 2 poles common trip 240vac and 3 poles common trip 208Yvac.