The Main Circuit Breaker is an essential component for protecting electrical systems from overloads and short circuits. Engineered for durability and dependable performance, this Eaton breaker is suitable for residential, commercial, or light industrial use. It features a 400 A rating and a NEMA 3R enclosure for safe and reliable outdoor installation. With a single-phase, three-wire configuration, it supports 120/240 V systems with ease.

Key Features:

• Accessory Type: Main Circuit Breaker
• Amperage Rating: 400 A
• Voltage Rating: 120/240 V
• Phase: Single Phase
• Wiring Configuration: Three Wire
• Enclosure Rating: NEMA 3R for outdoor applications

This main circuit breaker offers a reliable solution for power distribution and system protection, combining weather resistance with strong electrical performance.

Documents:

Specifications and datasheets
Eaton Specification Sheet - 1PMB400R