Federal Pacific 4340 Circuit Breaker, 40A, 3-Pole, 600V

Designed for rugged industrial electrical service, the Federal Pacific 4340 Circuit Breaker is a robust three-pole protective device rated at 40 A and compatible with systems up to 600 V. This unit is purpose-built for service, maintenance, and replacement projects where reliable three-phase protection matters most.

Key specifications at a glance

• Amperage: 40 A
• Poles: 3-pole
• Voltage rating: 600 V
• Manufacturer: Federal Pacific
• Part number: 4340
• Application: Industrial service, maintenance, and replacement projects

Why this 4340 breaker stands out

In three-phase systems, a 3-pole breaker like the 4340 protects all hot legs with a single protective device, simplifying installation and ensuring balanced protection across phases. The 40 A rating makes it well-suited for medium-load distribution panels, motor circuits, and feeders where reliable interruption on fault conditions is critical. Built for demanding industrial environments, this unit pairs with compatible Federal Pacific panels and switchgear that support the 4340 form factor.

Compatibility and installation notes

To ensure a proper fit, verify compatibility by cross-checking the part number 4340 with your panel or equipment’s requirements. Use the application guidance for your specific installation to confirm suitability for your system’s voltage, phase configuration, and mounting style. If you’re unsure about fit or replacement options, message us and we’ll help confirm compatibility and guide your purchase.

Ideal use cases

• Retrofits and replacements in industrial distribution panels that originally used 3-pole, 40 A breakers
• Maintenance outages where a reliable, multi-phase protective device is required
• New equipment builds or OEM integration that aligns with Federal Pacific 4340 specifications

What you’ll receive

• 1 x Federal Pacific 4340 Circuit Breaker (40 A, 3-pole, 600 V)

Ready to ensure continuous protection for your three-phase electrical infrastructure? Add the Federal Pacific 4340 Circuit Breaker to your toolkit, verify the fit by part number 4340, and reach out if you need help validating compatibility with your application.