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Square D QOU345 - 45A 3 Pole Miniature Circuit Breaker

Brand Square D
SKU QOU345
5.0
Rated 5.0 out of 5 stars
93 Reviews
Free Shipping Over $99
Free Shipping Over $99
Free Shipping Over $99
Free Shipping Over $99

Square D QOU345 - 45A 3 Pole Miniature Circuit Breaker

Brand Square D
SKU QOU345
5.0
Rated 5.0 out of 5 stars
93 Reviews
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Earn 128 SuperPoints

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Square D QOU345 - 45A 3 Pole Miniature Circuit Breaker

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$128.80 In stock

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DescriptionSpecificationsSuperClubWarranties
Description
Built for demanding commercial environments, the Square D QOU345 is a 45A, 3-pole miniature circuit breaker. It provides robust thermal-magnetic protection for a wide range of electrical systems. Designed for versatile installation, this unit-mount breaker fits standard DIN rail systems, OEM panels, and custom enclosures. It includes reversible box lugs for flexible top or bottom feed wiring. Delivering 10 kAIC at 240VAC, this HACR-rated device features a built-in Visi-Trip indicator.

Specifications

Brand Square D
Series QOU
Part Number QOU345
Amperage 45A
Voltage 240VAC, 120/240VAC, 48VDC
Poles 3
Phase 3
AIC Rating 10kA @ 240VAC, 10kA @ 120/240VAC, 5kA @ 48VDC
Mounting Style Unit Mount
Terminal Type Box Lugs
For Use With DIN Rail Systems, OEM Panels, Control Panels, Enclosures
Trip Technology Thermal Magnetic
Trip Function Code LI
Trip Function Long-Time, Instantaneous
Trip Adjustability Fixed Thermal, Fixed Magnetic
Wire Gauge 14-2 AWG
Max Wire 2 AWG
Min Wire 14 AWG
Available Options Mounting Feet, Padlock Attachment
Accessories Visi-Trip Indicator (Built-in)
Standards CSA C22.2 No. 5, IEC 60947-2, UL 489, HACR Rated
Approval CSA, HACR, IEC, UL
Temp Rating 40C
Construction Features HACR Rated, Visual Trip Indicator, Reversible Feed, Common Trip

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Warranties

We’ve got you covered!

When shopping with SuperBreakers, you’ll have peace of mind knowing that every single item you purchase includes a 60 day warranty, free of charge. Why such confidence? Because only the highest quality electrical parts have a place on our shelves, and we stand by every single one we sell.

If anything goes wrong with your item that is not a result of misuse or normal wear and tear, we’ll gladly replace it at no cost to you.

Click here to read our full warranty details

Shipping

Free Shipping Policy

Parcel shipments with item value over $99 qualify for free economy shipping within the continental US. Please call to confirm special handling instructions. We do not charge a handling fee or require a minimum amount on any order. SuperBreakers does not ship on customer accounts.

Click here to read our full shipping policy
Same Day Shipping

We strive to ship out your items the same day the order is placed. In rare circumstances SuperBreakers may reserve up to 5 business days to consolidate orders for complete shipment.
Expedited Shipments

Orders being shipped via Next Day Air, 2 Day Shipping or 3 Day Shipping must be received by 3 PM EST to guarantee same-day shipments. Expedited orders only ship on normal business days. Shipments will NOT be sent out on Saturdays and Sundays.
International Shipping

All International orders require a $1,000 minimum order threshold. Due to the special nature of these shipments, we require that these be placed with a SuperBreakers representative. Additional shipping and instructions will apply. All International Orders are Non-Cancel and Non-Refundable.

5.0
Rated 5.0 out of 5 stars
Based on 93 reviews
Total 5 star reviews: 89 Total 4 star reviews: 4 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
Reviews Summary
Customers say these circuit breakers fit perfectly and arrive in excellent condition. Many reviews mention fast shipping and competitive pricing. The products consistently match specifications and include necessary mounting hardware. Reviews highlight reliable functionality, with users particularly noting the ease of installation. Several mention the convenience of finding hard-to-source models. Common feedback includes praise for accurate product descriptions and timely delivery.
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93 reviews
  • ED
    Earl D.
    Verified Buyer
    Reviewing
    Square D QOU260 - 60A 2 Pole Miniature Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    3/4/26
    Great prices and quick shipments

    I ordered (2) 60 amp breakers at about 2/3 price of other online vendors. They were shipped almost immediately via USPS and arrived out here 'in the sticks' within about 3 days. Will order from these folks again. They also have commercial accounts...

    Was this helpful?
  • GH
    Gary H.
    Verified Buyer
    Reviewing
    Square D QOU260 - 60A 2 Pole Miniature Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    2/13/26
    Good

    Nicejob

    Was this helpful?
  • GM
    greg m.
    Verified Buyer
    Reviewing
    Square D QOU260 - 60A 2 Pole Miniature Circuit Breaker
    I recommend this product
    Rated 4 out of 5 stars
    2/10/26
    it worked

    it worked

    Was this helpful?
  • AW
    Adam W.
    Verified Buyer
    Reviewing
    Square D QOU110 - 10A 1 Pole Miniature Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    2/6/26
    Square D 10A Circuit Breakers

    These circuit breakers shipped very quickly and functioned properly.

    Was this helpful?
  • JW
    Jonathan W. T.
    Verified Buyer
    Reviewing
    Square D QOU115 - 15A 1 Pole Miniature Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    2/6/26
    Review

    Great company. Very customer centric, good prices, fast delivery, and all around excellent experience.

    Was this helpful?

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