Cutler-Hammer QCL3020 U is a three-phase, 240-volt, 20-amp circuit breaker. As a 3P unit in the Cutler-Hammer QCL family, it protects three conductors on 240V service and provides overcurrent protection for three‑phase circuits. This model, designated QCL3020 U, carries a 20A rating at 240V and is used in electrical panel installations where a three-pole breaker is required for 240V three-phase power.
