The Eaton KDB3400W is a 3-pole, 400 A, 600 V circuit breaker used to protect three-phase electrical circuits from overloads and short circuits. Identified as a blue-label unit in the Eaton KDB series, this breaker is designed to interrupt fault currents in systems operating up to 600 volts. With a 3-pole configuration and 400 A rating, it suits industrial and commercial power distribution applications requiring reliable, built-in overcurrent protection.
