Square D QJA221751 175A 2P 240V Circuit Breaker | AmpState

When you need reliable protection for 240V circuits in panelboards and load centers, the Square D QJA221751 175A 2P circuit breaker from AmpState delivers dependable performance with a design built for retrofit and maintenance environments.

Key details at a glance:

• Manufacturer: Square D
• Part number: QJA221751
• Product type: Circuit Breaker
• Amperage rating: 175 A
• Poles: 2
• Voltage: 240 V
• Common applications: panelboards, load centers, electrical distribution
• Availability: In stock from AmpState

Why this breaker stands out for retrofit and maintenance

For projects where you want to keep the same part number across a fleet or upgrading aging equipment, this QJA221751 breaker offers a reliable option for retrofit and ongoing maintenance. It’s designed to protect feeders and branch circuits at 240V, with a 2-pole configuration that supports multi-wire branch circuits in compatible panels. Keeping a matching 175 A, 2-pole, 240V breaker on hand simplifies ordering, reduces confusion during service, and minimizes panel downtime when replacements are needed.

What problems it solves

Outages and panel downtime often come from mismatched or unavailable replacement parts. With the QJA221751 from AmpState, you get a consistent part number for easier procurement, faster stock rotation, and fewer surprises during service calls. It provides robust circuit protection for critical feeders and distribution circuits, helping you maintain safety and compliance in commercial, industrial, and upgraded electrical systems.

Who it’s ideal for

Electrical contractors, facilities managers, and maintenance teams responsible for panelboard refreshes, retrofits, or spare-part inventories will benefit from having this exact 175 A, 2-pole, 240 V breaker on hand. It’s well-suited for service upgrades, grid modernization projects, or any plan that prioritizes having a matching, predictable part number in stock.

Compatibility and fit guidance

Before installation, confirm that your panelboard model lists 175 A, 2-pole, 240 V breakers as permissible options. If you’re unsure about fit or compatibility, AmpState offers support to verify the match and ensure the part will perform safely in your distribution system. Just reach out and we’ll help confirm fit.

Practical tips for installation and storage

• Store in original packaging until use to prevent contamination or corrosion.
• Record the part number (QJA221751) in your maintenance log for easy future ordering.
• Pair this breaker with a matched set of compatible connectors and panel hardware to ensure reliable operation.