Siemens Q2100 is a two-pole molded‑case circuit breaker from the Q Series (Type QP), rated for 100 A at 120/240 V AC. This plug‑in device provides thermal‑magnetic overcurrent protection with a 10 kA short‑circuit rating at 240 V, making it suitable for branch circuits and feeders in residential, commercial, and light‑industrial panels. The USNT designation identifies its listing for U.S. installations, and the unit includes long‑time and instantaneous trip functions to protect connected loads in power distribution systems.
