Square D QHB320 20A 3P 240V Circuit Breaker, QO, Bolt-On | AmpState

Discover the Square D QHB320 20A 3P 240V Circuit Breaker — a precise, reliable component for protecting circuits in panelboards, load centers, and electrical distribution networks. Designed for QO bolt-on installations, this breaker delivers robust performance in demanding commercial and industrial environments. For teams that rely on exact part-number compatibility, the QHB320 is a straightforward match that simplifies inventory and service workflows.

• Manufacturer: Square D
• Part number: QHB320
• Product type: Circuit Breaker
• Amperage: 20 A
• Poles: 3
• Voltage: 240 V
• Configuration: QO Bolt-On
• Intended use: Panelboards, load centers, and electrical distribution
• Availability: AmpState

What sets the QHB320 apart is its direct-fit reliability within the Square D QO family. The bolt-on design offers secure mounting and dependable trip performance, ensuring your circuits stay protected without unexpected shutoffs. This specificity matters when you're fabricating or repairing panels where every component must align with the Square D ecosystem.

Ideal for:

• Maintenance teams performing circuit protection upgrades in service panels and commercial boxes.
• Panel builders sourcing authentic QO breakers that match exact part numbers for fast, compliant installs.
• Facilities inventories where a single, correctly labeled 3-pole 20A 240V breaker keeps job sites moving.

Compatibility and fitment are crucial. The QHB320 is designed for 3-pole, 240V circuits in QO bolt-on configurations. If you're replacing a failed unit or planning a panel upgrade, confirm that your panel accepts QO bolt-on breakers and that the 20 A rating aligns with your circuit design. AmpState simplifies this with clear part-number matching and authentic Square D sourcing.

Ready to secure dependable protection for your electrical distribution? Add the Square D QHB320 20A 3P 240V Circuit Breaker to your cart and keep spare inventory aligned with exact-match requirements. If you need a quick compatibility check, send us a note and we’ll verify fit against your panel model and bus configuration.