Zinsco QFP2200 Main Molded Case Circuit Breaker

The Zinsco QFP2200 is a 200 Amp, 2-pole, single-phase molded case main circuit breaker designed for use in Zinsco / GTE Sylvania / Challenger load centers. It operates on 120/240 V systems and uses a thermal-magnetic trip that provides protection against overloads and short circuits. This plug-in (plug-on) main breaker features hold-down provisions for secure installation and is commonly used as a main disconnect or feeder in residential and light commercial electrical systems, particularly in legacy Zinsco panels. It has an interrupt rating of approximately 10 kAIC at 240 V and is listed as obsolete / discontinued, commonly found as surplus or reconditioned.