The Eaton NSB CH320 three-pole miniature circuit breaker is a 20 A device rated for 240 V and designed for 50/60 Hz three‑phase electrical distributions, intended for use in commercial and light industrial panels. As part of the CH family, the CH320 provides overcurrent protection for three‑phase circuits in Eaton NSB panelboards and enclosures, interrupting all three poles when an overload or short circuit is detected. This 3P MCB is suited for 240 V, 3‑phase installations and protects feeders and branch circuits in three‑phase networks. The CH320 is compatible with Eaton NSB CH‑series installations operating at 50/60 Hz in 240 V systems.
