Square D QOB340EPD 40A 3P 240V Circuit Breaker, GFCI, Bolt-On | AmpState

Meet the Square D QOB340EPD — a dedicated GFCI circuit breaker built for everyday electrical protection in panelboards, load centers, and distribution panels. With a 40 A rating, 3 poles, and 240 V operation, this bolt-on unit delivers reliable ground-fault protection where it matters most, helping keep your electrical system safe, compliant, and up to code.

• Part Number: QOB340EPD
• Manufacturer: Square D
• Product Type: GFCI Circuit Breaker (Bolt-On)
• Amperage: 40 A
• Poles: 3
• Voltage: 240 V
• Applications: Panelboards, load centers, electrical distribution
• Ideal for: Maintenance teams, panel builders, and spare inventory where a direct part-number match matters

Why this breaker stands out

• GFCI protection for critical circuits: Ground-fault awareness reduces the risk of shock and electrical fires in rooms and equipment with higher exposure to moisture or miswiring.
• Bolt-On installation: Quick, secure mounting in compatible Square D panels, minimizing downtime during replacements or panel upgrades.
• Exact fit, reliable performance: The QOB340EPD is designed for direct part-number compatibility in system designs that require a precise match.
• 3P 240V configuration: Ideal for 3-phase commercial and industrial loads, enabling efficient protection across multi-wire circuits.

Who it’s for and practical use cases

• Maintenance teams conducting routine panel maintenance or upgrades who need an exact part-number match to avoid delays.
• Panel builders and electrical contractors sourcing components for new installations that require reliable GFCI protection at 240 V.
• Spare inventory for service trucks and warehouses to ensure quick replacement in critical distribution points.

Compatibility and support

AmpState makes it easy to confirm fit. If you’re unsure about compatibility with your current panelboard or load center, you can message us and we’ll help verify the correct part-number match and installation considerations for your setup.

Choose the Square D QOB340EPD when you need dependable GFCI protection in a bolt-on, 3-pole, 240 V package. It’s a practical, purpose-built solution for maintaining safe, compliant electrical distribution across commercial and industrial environments.