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Square D EGB24045 Miniature Circuit Breaker

  • 45A
  • 2 Pole
  • Bolt-On
Square D EGB24045
Miniature Circuit Breaker
Brand Square D
SKU EGB24045
Select Item Condition
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  • 45A
  • 2 Pole
  • Bolt-On

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Square D EGB24045 - 45A 2 Pole Miniature Circuit Breaker

Square D EGB24045 - 45A 2 Pole Miniature Circuit Breaker

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$391.50 In Stock

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Description

Built for commercial and industrial power distribution, the Square D EGB24045 is a 45A, two-pole miniature breaker. It features a robust E-Frame construction and utilizes thermal-magnetic trip technology for reliable protection. This unit installs into Square D NF panelboards using a secure bolt-on mounting style. Rated for 65 kAIC at 240V and 35 kAIC at 480Y/277V, it provides substantial interrupting capacity.

Specifications

Key specifications
Brand Square D
Series EGB
Amperage 45A
Poles 2
Mounting Style Bolt-On
Voltage 120VAC, 240VAC, 480Y/277VAC
Phase 1
AIC Rating 65kA @ 120VAC, 65kA @ 240VAC, 35kA @ 480Y/277VAC
Fit and installation
Frame Type EGB
Terminal Type Lugs
For Use With Square D NF Panelboards
Wire Gauge 14 AWG-2/0 AWG (Cu), 12 AWG-2/0 AWG (Al)
Max Wire 2/0 AWG
Min Wire 14 AWG (Cu), 12 AWG (Al)
Protection and operation
Trip Technology Thermal Magnetic
Trip Function Code LI
Trip Function Long-Time, Instantaneous
Trip Adjustability Fixed Thermal, Fixed Magnetic
Standards and features
Available Options Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment
Accessories Load Side Lugs Included
Standards CSA C22.2 No. 5, NEMA AB 1, NFPA 70, UL 489
Approval CSA, cULus, HACR, HID, NOM, UL
Temp Rating -25C to 70C
Construction Features HACR Rated, HID Rated, Visual Trip Indicator

Product FAQs

8 answers
Which panelboards accept the EGB24045 breaker?

This E-frame breaker is designed specifically for Square D NF panelboards. It features a bolt-on connection that secures directly to the NF buswork and will not fit NQ, I-Line, or QO load centers.

Can the EGB24045 replace an EDB24045 or EJB24045 breaker?

Yes. The EGB24045 shares the exact physical dimensions and mounting footprint as the EDB24045 and EJB24045. The G in the catalog number indicates a 35kA interrupting rating at 480Y/277VAC, which serves as a direct upgrade to the 18kA-rated EDB series, but is lower than the 65kA-rated EJB series.

What does the G in the EGB24045 catalog number signify?

In Square D E-frame breakers, the second letter designates the interrupting rating tier at 480Y/277VAC. The G indicates a 35kA rating, placing it between the standard D tier at 18kA and the high-interrupting J tier at 65kA.

Does the EGB24045 include a visual trip indicator?

Yes. This breaker features the Square D Visi-Trip indicator. When the breaker trips due to an overload or short circuit, the handle snaps to a midpoint position and a highly visible red indicator appears, allowing electricians to quickly identify the faulted circuit in a crowded panel.

Are the factory lugs on the EGB24045 dual-rated for copper and aluminum?

Yes. The included mechanical lugs are AL-CU rated. They accept copper conductors from 14 AWG to 2/0 AWG and aluminum conductors from 12 AWG to 2/0 AWG.

How does the interrupting rating of the EGB24045 change based on system voltage?

The breaker provides a 35kA interrupting rating when applied at its maximum 480Y/277VAC rating. However, when installed on 120VAC or 240VAC systems, the interrupting capacity increases to 65kA.

Does this breaker require a separate mounting kit for installation?

No. The EGB24045 is a bolt-on breaker that mounts directly to the buswork of a Square D NF panelboard. No additional mounting hardware or terminal pad kits are required for standard installation.

Is the EGB24045 HACR rated?

Yes. This breaker is HACR rated, meaning it is approved for use with heating, air conditioning, and refrigeration equipment that requires circuit protection.

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Reviews

4.9
Rated 4.9 out of 5 stars
Based on 25 reviews
Total 5 star reviews: 23 Total 4 star reviews: 2 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
Rating
Ratings
25 reviews
  • RS
    Robert S.
    Verified Buyer
    Reviewing
    Square D EGB34015 - 15A 3 Pole Miniature Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    4/21/26
    New breaker

    Great product, exactly what I needed and shipped in a timely manner!

  • EB
    Ed B.
    Verified Buyer
    Reviewing
    Square D EGB34100 - 100A 3 Pole Miniature Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    11/5/25
    100 amp breaker

    Prompt ordering and shipping at a fair price. Thanks

  • EB
    Ed B.
    Verified Buyer
    Reviewing
    Square D EGB34015 - 15A 3 Pole Miniature Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    10/11/25
    Breaker purchase

    quick response and shipping

  • TI
    Tim I.
    Verified Buyer
    Reviewing
    Square D EGB34040 - 40A 3 Pole Miniature Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    8/6/25
    Problem Solved

    The breakers showed up packaged very well and in great shape. The pricing was very competitive and solved our problem sourcing older circuit breakers.

  • MK
    Marvin K.
    Verified Buyer
    Reviewing
    Square D EGB34045 - 45A 3 Pole Miniature Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    8/4/25
    Square D EGB34045 3 Pole Circuit Breaker

    Breaker and service was great and always has been. Looking forward more business in the future. Thanks.