Square D QOB320EPD - 20 A, 240 V, 3-Pole Bolt-On Circuit Breaker | AmpState

The Square D QOB320EPD is a 20A, 240V, 3-pole bolt-on molded case circuit breaker engineered to deliver dependable branch circuit protection for panelboards and load centers. Its robust bolt-on mounting creates a secure, vibration-resistant connection that stays tight in demanding installations, reducing the risk of loose bus connections over time.

• Secure bolt-on mounting ensures a rigid, vibration-resistant bus connection for reliable long-term performance in commercial, industrial, and residential panels.
• Thermal-magnetic trip unit provides stable, repeatable protection for both overloads and short circuits, delivering fast, predictable responses when faults occur.
• OEM-fit compatibility is designed to pair with matching Square D load centers and panelboards, making replacement straightforward without compromising safety or performance.
• Three-pole, 240V protection ideal for residential, commercial, and light industrial circuits that require protection across three hot legs or three-phase equipment.

What this means in practical terms

Use the QOB320EPD to safeguard circuits in main distribution panels, subpanels, or load centers where reliable 20A protection across three poles is needed. It’s especially well-suited for environments with equipment that can introduce vibration, such as HVAC units, pumps, or three-phase motors, where a secure connection and precise trip behavior are crucial for uptime and safety.

Technical specifications

• Manufacturer: Square D
• Part Number: QOB320EPD
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 20A
• Voltage Rating: 240V
• Number of Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection