Siemens Q320U is a 3-pole, 20-amp, 240-volt molded-case circuit breaker from the Siemens Q-Series (QP family). It uses a thermal-magnetic trip and features a plug-in design for use in QP-style panels, delivering a 10,000-ampere interrupting capacity (10 kAIC) at 240V. UL 489-listed for residential and light commercial distribution, the Q320U protects three hot conductors in a 240V circuit, making it suitable as a main or feeder breaker in compatible Siemens panel configurations.
