The Square D PowerPact HJ 150 Circuit Breaker HJF36150 is a high-quality electrical component designed for industrial applications. With a maximum amperage of 150A and a voltage rating of 551-600V, this 3-pole thermal circuit breaker offers reliable protection for your electrical system. The on/off operation method ensures easy maintenance and control, while the black color adds a sleek appearance. Manufactured by Square D in the United States, this main breaker is a durable and efficient solution for your electrical needs.