Eaton GD3020 - 20 A, 480 V, 3-Pole Circuit Breaker | AmpState

The Eaton GD3020 is a compact, three‑pole molded case circuit breaker designed for reliable branch circuit protection in panelboards and loadcenters. With a 20-amp rating and a 480-volt capacity, it handles 3‑phase distribution common in commercial and light industrial environments while keeping your panel layout efficient and organized.

Why the GD3020 stands out

• Space‑saving, molded case design — engineered to maximize panel space, allowing more circuits in the same enclosure and reducing busbar crowding.
• Thermal‑magnetic trip unit — delivers stable, repeatable protection by responding to both overload (thermal) and short‑circuit (magnetic) conditions. This means quicker responses to faults and consistent protection over time.
• 3‑pole for 3‑phase systems — ideal for 480V applications, including commercial power distribution, industrial equipment feeds, and motor control circuits where three‑phase protection is essential.
• OEM compatibility — designed to fit and function with matching Eaton OEM loadcenters and panelboards, ensuring a clean, reliable replacement or expansion without compatibility concerns.
• Versatile application range — suitable for residential, commercial, and light industrial installations, making it a versatile choice across project types and equipment racks.

Key specifications at a glance

• Manufacturer: Eaton
• Part number: GD3020
• Type: Thermal‑magnetic molded case circuit breaker
• Amperage rating: 20 A
• Voltage rating: 480 V
• Number of poles: 3
• Application: Branch circuit overcurrent and short‑circuit protection

Practical use cases

• Distributing 3‑phase power to commercial lighting panels and HVAC equipment in mid‑size facilities
• Feeding industrial control panels and motor controllers where 480V three‑phase service is standard
• Protecting branch circuits in data/telecom rooms with compact enclosures to maximize space
• Replacing aging breakers in compatible Eaton panelboards to restore trusted protection without rewiring or panel modifications

How this breaker helps you manage risk and maintenance

With a dedicated thermal‑magnetic protection scheme, the GD3020 provides predictable trip behavior, helping maintenance teams pinpoint fault causes quickly. Its compatibility with Eaton’s OEM panels means fewer surprises during replacement, and the compact footprint supports future panel expansions without needing a larger enclosure. This leads to fewer spare parts on hand and smoother project workflows.

Installation and care tips

• Ensure you’re installing into a compatible Eaton loadcenter or panelboard—matching the GD3020’s form factor and ratings simplifies procurement and serviceability.
• Verify system voltage and phase configuration before installation to prevent misrating or nuisance trips.
• Follow standard electrical safety practices: qualified personnel only, proper torque on terminals, and post‑installation verification of trip function.
• Label circuits clearly to reflect 3‑phase protection and 480V service for safer operation and easier future maintenance.

Choose the Eaton GD3020 for dependable, space‑efficient 3‑pole protection that aligns with your 480V, three‑phase systems. It’s a practical, durable solution built to support both new installations and reliable replacements in panelboards and loadcenters.