Eaton GHC3070S1 70A 3-Pole 277 V Circuit Breaker

Meet the Eaton GHC3070S1, a purpose-built 70 A, 3-Pole 277 V circuit breaker designed to protect 3‑phase electrical circuits in demanding commercial environments. Built to support reliable distribution in lighting, HVAC, and motor-driven systems, this unit is a trusted choice for panels that require robust trip protection at 277 V.

Key specifications at a glance

• Current rating: 70 A
• Poles: 3
• Voltage rating: 277 V
• Part number: GHC3070S1

Why this 3‑pole breaker stands out

In three‑phase electrical systems, a 3‑pole breaker like the GHC3070S1 ensures simultaneous disconnection of all live conductors during a fault. This coordinated protection minimizes equipment damage, improves safety for maintenance personnel, and helps maintain system stability in commercial facilities where 277 V circuits power lighting, motors, and other critical loads.

Suitable use cases

• Commercial lighting and lighting ballasts powered by 277 V circuits
• Three‑phase motor loads and equipment in office complexes, retail centers, and industrial spaces
• HVAC systems and other 277 V distribution networks that require reliable overload and short‑circuit protection
• Panel boards and distribution panels that specify a 3‑pole, 277 V protection device

Practical installation and compatibility notes

Ensure this breaker is compatible with your electrical panel and that 277 V three‑phase configurations are appropriate for your system. Confirm mounting fitment with the panel’s acceptance for 3‑pole breakers and follow all local electrical codes during installation. Properly size conductors and secure connections according to manufacturer guidelines to maintain optimal performance and safety.

What makes it the right choice for your project

The Eaton GHC3070S1 delivers focused, dependable protection for 277 V three‑phase applications with a clear, purpose‑built specification: 70 A capacity, 3 poles, and a 277 V rating. If your project requires consistent trip performance across all phases and reliable protection for commercial and industrial loads, this breaker offers a straightforward, compatible solution that aligns with Eaton’s trusted safety and reliability standards.