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Matched our existing hardware and fit as expected. Clean install.
Maintenance · Retrofit work
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Circuit Breaker
Square D | FCJ34045 | Circuit Breaker | 45A | 3-Pole | 480V
| Part Number | FCJ34045 |
| Amperes | 45 |
| Poles | 3 |
| Voltage | 480 |
| Product Type | Circuit Breaker |
Regular price
$2,010.00
Sale price
$2,010.00
Regular price
Unit price
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Seamless online shopping experience guaranteed with easy shipping and returns policy.
Shop with Confidence: Our Products come with a Reliable Year-Long Warranty.
Square D | FCJ34045 | Circuit Breaker | 45A | 3-Pole | 480V
Regular price
$2,010.00
Sale price
$2,010.00
Regular price
Unit price
Product description
Shipping
Meet the Square D FCJ34045 Circuit Breaker — a genuine, industrial-grade protective device built for 480V three-phase systems. With a 45A rating and a 3-pole configuration, this breaker delivers dependable protection for demanding equipment, ensuring that motor drives, feeders, and critical loads stay safeguarded during operation and maintenance alike.
- Amperage: 45A
- Poles: 3-Pole
- Voltage: 480V
Important compatibility note: Confirm fit and ratings before ordering. The FCJ34045 part number is the best reference for compatibility with your Square D panels and a 480V three-phase setup.
Why choose the Square D FCJ34045 for your project? This circuit breaker is purpose-built for maintenance, retrofit, and replacement scenarios where precise specifications matter. It provides reliable overcurrent protection across all three live conductors, helping you prevent equipment damage, minimize downtime, and maintain safe electrical distributions in industrial environments.
Ideal use cases include:
- Routine maintenance on 480V three-phase distribution circuits
- Retrofit projects where existing protection must match exact amperage, pole, and voltage specs
- Replacement of failed breakers in Square D panels that require FCJ34045 compatibility
Practical considerations for installation and use:
- Verify panel compatibility by referencing the FCJ34045 part number against your current breaker lineup
- Ensure the surrounding electrical system is de-energized and follow all safety protocols during replacement
- Use in environments where 480V three-phase protection is required, such as industrial machinery, manufacturing lines, and heavy-load feeders
Designed with the reliability you expect from Square D, the FCJ34045 helps you maintain consistent protection for critical loads in high-voltage, three-phase applications. If your project demands a precise 45A, 3-pole, 480V interrupting device, this breaker is a dependable, compatible choice that aligns with industry standards and installation best practices.
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