Schneider Electric's Square D FY14020B is a 1-pole molded‑case circuit breaker in the FY/F‑frame family, rated for 20 A on 277 V AC and designed for I‑Line plug‑on installation in compatible panels. It provides long‑time and instantaneous trip functions to protect circuits from overloads and short circuits, with a short‑circuit interrupting rating of 18 kA at 277 V. This 1P MCCB is commonly used in commercial and light industrial panels to safeguard 277 V circuits such as lighting or branch loads in Schneider Electric’s I‑Line distribution systems.
