Federal Pacific Electric QMQB4032 U circuit breaker is a 400 A, 250 V, three‑phase unit (model QMQB4032 U). It carries a 200K rating and measures 13-1/2" x 22-1/2" in size. This U‑type breaker belongs to the Federal Pacific QMQB family and is used to protect large three‑phase feeders in electrical distribution systems.
