Eaton CH330ST - 30 A, 240 V, 3-Pole Plug-In Circuit Breaker | AmpState

The Eaton CH330ST is a purpose-built protection device designed to safeguard your panelboard and its connected loads. At 30A and 240V with a 3-pole plug-in design, this molded case circuit breaker provides reliable, immediate response to overcurrent and short-circuit events, keeping wiring and equipment safer and downtime minimal.

Why the CH330ST stands out

• Fast plug-in connection for quick, tool-free installation or field replacement—minimizing service time and downtime during upgrades or routine maintenance.
• Thermal-magnetic trip unit delivers stable, repeatable protection. The thermal element handles ongoing overloads, while the magnetic element delivers a swift response to short circuits, helping prevent damage to downstream equipment.
• 3-pole design for 240V systems and three-phase protection—ensuring all energized conductors disconnect together for enhanced safety and coordinated curve protection in multi-wire circuits.
• OEM-level compatibility engineered to fit matching Eaton panels and panelboards, ensuring proper fit, electrical performance, and trip conformity with your existing infrastructure.

Who benefits from the CH330ST

Electricians, facilities managers, and installers will appreciate the dependable protection this breaker provides for residential, commercial, and light industrial applications. Use it to safeguard feeders, HVAC, lighting, and miscellaneous branch circuits where a robust 30A rating and 240V operation are required. Ideal for panelboard modernization, retrofit projects, or new installations that demand fast, reliable protection with easy serviceability.

How it works in the real world

When current on a protected circuit exceeds 30A or a short occurs, the CH330ST trips to disconnect all three poles. This instant action limits fault current, reduces thermal stress on wiring, and helps prevent equipment damage. After a fault is cleared, the breaker can be reset, restoring service without extensive downtime.

Technical specs at a glance

• Manufacturer: Eaton
• Part Number: CH330ST
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 30A
• Voltage Rating: 240V
• Poles: 3
• Mounting Style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Practical tips and best-use scenarios

For a clean, reliable installation, pair the CH330ST with Eaton-compatible load centers and panelboards. When upgrading existing service, verify that the panel accepts plug-in CH-series breakers and that the 30A, 240V, 3-pole configuration matches the circuit requirements. In new builds or retrofits, plan feeder protection around this 3-pole solution to ensure balanced, coordinated shutoff across all phases.

Choose the Eaton CH330ST for a dependable, field-proven safeguard that emphasizes quick serviceability, precise protection, and seamless integration with your Eaton panel ecosystem—delivering peace of mind for electrical systems in homes, workplaces, and light industrial environments. AmpState delivers authentic Eaton components to support reliable, compliant installations.