The Square D 0W6129A is a 3 pole, 250 AMP, 500VDC TYPE KAAL circuit breaker interrupter designed for use in electrical systems with AC/DC current type. This main breaker has 3 positions and a voltage rating of 551-600V. Manufactured by Square D, a trusted brand in electrical equipment and supplies, this circuit breaker is ideal for industrial and commercial applications requiring reliable protection and control of electrical circuits.