Square D Q432300 300A 3P 240V Circuit Breaker, Plug-On | AmpState

When you need reliable circuit protection for a three-phase system, the Square D Q432300 plug-on circuit breaker is built for everyday electrical work. This 300 A, 3-pole unit is designed to protect panelboards, load centers, and electrical distribution networks, ensuring safe, continuous operation of your critical equipment.

Key specifications at a glance:

• Part Number: Q432300
• Amperage: 300 A
• Poles: 3
• Voltage: 240 V
• Type: Plug-On Circuit Breaker
• Manufacturer: Square D
• Application: Panelboards, Load Centers, and Electrical Distribution

Why it matters

• Designed for replacement projects and to keep your BOM aligned with the original part number, ensuring seamless stocking and compatibility.
• Plug-on installation minimizes downtime in service panels and distribution boards, making field work faster and safer.
• Rugged build for industrial and commercial environments, delivering dependable trip protection at high current levels.

Use cases and ideal scenarios

• Replacing a worn or tripped breaker in a 3-phase commercial or industrial panel that requires 240 V and 300 A protection.
• Stocking a spare that matches the original equipment BOM, so maintenance crews stay aligned with the installed base.
• Installing or refurbishing panelboards and load centers in facilities where Square D components are standard.

Compatibility support

AmpState offers this Square D Q432300 unit directly, and if you’re unsure about fit, you can message us and we’ll help confirm compatibility with your panel and wiring configuration.

Practical installation tips

• Always de-energize the panel and verify absence of voltage before attempting replacement.
• Verify the breaker’s rating and pole configuration matches the panel’s requirements and the original BOM.
• Store the spare in a clean, dry place and tag it with the part number for quick future reference.