Eaton BR3100 Miniature Circuit Breaker is a BR-series, three-pole (3P) MCB rated 100 A at 120 V with 50/60 Hz operation, designed for use in three‑phase electrical systems. As part of Eaton’s NSB BR3100 family, this device provides standard overcurrent protection for three‑phase feeders and branch circuits in compatible Eaton equipment. The 3P configuration supports protection across all three phases in a single compact breaker, identifying it within the BR line of molded‑case breakers.
