Eaton CHB320 - 20 A, 240 V, 3-Pole Bolt-On Circuit Breaker | AmpState

The Eaton CHB320 is a rugged, bolt-on molded case circuit breaker engineered for dependable branch circuit protection in panelboards and loadcenters. With a 20 A rating and 240 V operation across 3 poles, this unit is built to handle 3-phase circuits common in commercial and light industrial settings while remaining suitable for certain residential applications where 3-phase service is available.

What sets the CHB320 apart

• Secure bolt-on mounting delivers a rigid, vibration-resistant connection to the busbars, helping maintain consistent electrical contact in environments with movement or vibration.
• Thermal-magnetic trip unit combines precise thermal overload protection with rapid magnetic short-circuit protection, providing stable, repeatable protection performance across a wide range of operating conditions.
• OEM compatibility designed to pair with matching Eaton loadcenters and panelboards, ensuring a seamless fit and predictable electrical behavior.
• Versatile 3-pole design supports 3-phase circuits at 240 V, making it a practical choice for panelboards and loadcenters used in commercial and light industrial applications.

Ideal for

The CHB320 is well-suited for installations where compact, reliable three-pole protection is required. It shines in:

• New or retrofit panelboards and loadcenters in commercial spaces, workshops, and light industrial facilities
• Systems that experience vibration or movement where a secure bus connection matters
• Electrical setups needing a predictable, repeatable trip profile for 3-phase equipment

Use cases and practical benefits

• Motor and equipment safety—protect 3-phase motors and related loads from overcurrent and short circuits with reliable trip behavior.
• System reliability—the bolt-on design reduces loose connections and arcing risks in busy electrical environments.
• Panel compatibility—engineered to work with Eaton’s own line of load centers and panelboards, helping you maintain a consistent protection scheme across the installation.

Technical snapshot

• Manufacturer: Eaton
• Part Number: CHB320
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 20 A
• Voltage Rating: 240 V
• Number of Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Installation and care tips

For best results, ensure you’re pairing the CHB320 with compatible Eaton panelboards or loadcenters. Follow standard electrical best practices for bolting the breaker in place, and confirm all connections are clean and torque-compliant as per panel specifications. Regular visual checks for any signs of wear or overheating on the breaker can help maintain long-term reliability in demanding environments.

Choose the Eaton CHB320 when you need a dependable, three-pole breaker that delivers robust protection, vibration resistance, and OEM-backed compatibility for panelboards and loadcenters in commercial and light industrial settings.