Eaton CH3090ST - 90 A, 480 V, 3-Pole Bolt-On Circuit Breaker | AmpState

The Eaton CH3090ST is a rugged 90A, 480V, 3-pole bolt-on molded case circuit breaker designed to protect your panelboards and loadcenters from overcurrent and short-circuit events. Built for dependable, long-term performance in residential, commercial, and light industrial environments, this MCCB combines solid mechanical mounting with precise electrical protection to keep your electrical system safe and reliable.

• Secure bolt-on mounting delivers a rigid, vibration-resistant connection to the bus, reducing the risk of loose contacts and ensuring consistent performance even in active electrical environments.
• Thermal-magnetic trip unit provides stable, repeatable protection by combining overload (thermal) and short-circuit (magnetic) response, helping minimize nuisance trips and equipment damage during fault events.
• 3-pole, 480V design ideal for three-phase circuits common in commercial spaces, industrial equipment, and large HVAC or motor-driven applications.
• OEM-compatible installation engineered to pair with matching OEM loadcenters and panelboards for a seamless, code-compliant upgrade or replacement.
• Versatile application range suitable for a variety of settings—from home electrical panels to light commercial installations and small-scale industrial panels—providing reliable protection where it matters most.

Technical snapshot

• Manufacturer: Eaton
• Part Number: CH3090ST
• Type: Thermal-magnetic molded case circuit breaker (MCCB)
• Amperage Rating: 90 A
• Voltage Rating: 480 V
• Number of Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection in panelboards and loadcenters

Ideal use cases

• Protect 3-phase feeders for commercial lighting, HVAC equipment, and small industrial machinery.
• Replace or upgrade panelboard protection in retrofit projects where OEM compatibility matters.
• Provide reliable motor circuit protection for compressors, fans, pumps, and conveyors in light commercial settings.
• Install in residential multi-unit or service panels that require robust three-phase protection at 480V where applicable.

Choosing the Eaton CH3090ST means prioritizing dependable protection with a proven mounting approach, precise thermal-magnetic tripping, and OEM-ready compatibility. It’s built to stay engaged under real-world conditions, delivering predictable performance when it counts—protecting people, property, and equipment in today’s busy electrical environments.

Ready to upgrade your panel with a trusted, 3-pole 480V solution? The CH3090ST from Eaton, available through AmpState, brings durable protection and straightforward installation to your electrical system.