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circuit-breaker
Square D QOXD340 Circuit Breaker, 40A, 3-Pole, 120V
★★★★★
| Part Number | QOXD340 |
| Amperes | 40 |
| Poles | 3 |
| Voltage | 120 |
| Product Type | circuit-breaker |
Regular price
$460.00
Sale price
$460.00
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 QOXD340 Circuit Breaker, 40A, 3-Pole, 120V
Regular price
$460.00
Sale price
$460.00
Regular price
Unit price
Product description
Shipping
Square D QOXD340 Circuit Breaker — a rugged 40 A, 3-pole solution designed for demanding industrial service, maintenance, and replacement projects. With a 120 V rating, this breaker is built to protect multi-wire and 3-phase distribution setups, delivering reliable interruption when faults or overloads occur.
Key specifications
- Manufacturer: Square D
- Part Number: QOXD340
- Product Type: Circuit Breaker
- Amperage: 40 A
- Poles: 3
- Voltage: 120 V
Why this matters for your system
- Three-pole design supports multi-wire and 3-phase circuits, providing coordinated protection across multiple live conductors
- 40 A rating is suited for protecting branch circuits and connected equipment in industrial environments
- Industrial-grade protection helps reduce downtime and equipment damage by ensuring fast, predictable trips
- Compatibility-focused design emphasizes reliability when replacing or upgrading existing panels
Who should consider the QOXD340
- Electrical contractors performing industrial service calls, preventative maintenance, or equipment replacement
- Plant maintenance teams upgrading distribution panels or reconfiguring 3-phase circuits
- Facilities managers seeking a trusted, durable breaker from a core electrical brand
Compatibility and installation notes
Verify fit by part number and application requirements to ensure seamless integration with your panel and circuits. The exact compatibility depends on your specific equipment and installation scenario, so please double-check the part number QOXD340 against your project needs.
Need help matching a part number or confirming compatibility with your application? Message us and we'll help ensure you get the right fit for your electrical system.
Contact sales@ampstate.com
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What Our Customers Say
General feedback we often hear from customers purchasing industrial electrical parts.
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Good communication and clear updates while the order was processed.
Project · Coordination
Verified
Looks and feels like a proper industrial-grade part. Works as expected.
Service · Field install
