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Square D EH24040 Molded Case Circuit Breaker
- 40A
- 2 Pole
- Plug-On
Square D
EH24040
Molded Case Circuit Breaker
Brand
Square D
SKU
EH24040
Quantity
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Square D EH24040 - 40A 2 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Square D EH24040 - 40A 2 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Part Number | EH24040 |
| Series | EH |
| Amperage | 40A |
| Poles | 2 |
| Mounting Style | Plug-On |
| Voltage | 480Y/277VAC, 120/240VAC |
| Phase | 1 |
| AIC Rating | 14kA @ 480Y/277VAC, 65kA @ 120/240VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D NEHB Panelboards |
| Wire Gauge | 14-2 AWG (Cu), 12-2 AWG (Al) |
| Max Wire | 2 AWG |
| Min Wire | 14 AWG (Cu), 12 AWG (Al) |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, HACR, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Visual Trip Indicator |
Quantity
Square D EH24040 - 40A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Part Number | EH24040 |
| Series | EH |
| Amperage | 40A |
| Poles | 2 |
| Mounting Style | Plug-On |
| Voltage | 480Y/277VAC, 120/240VAC |
| Phase | 1 |
| AIC Rating | 14kA @ 480Y/277VAC, 65kA @ 120/240VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D NEHB Panelboards |
| Wire Gauge | 14-2 AWG (Cu), 12-2 AWG (Al) |
| Max Wire | 2 AWG |
| Min Wire | 14 AWG (Cu), 12 AWG (Al) |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, HACR, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Visual Trip Indicator |
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Description
A drop-in solution for legacy systems, the Square D EH24040 is a 2-pole, 40-amp plug-on molded case circuit breaker. It installs into older NEHB panelboards, which uniquely support both plug-on and bolt-on connections. If a plug-on unit is not required, the EHB24040 bolt-on breaker acts as a direct substitute. Rated for 14kAIC at 480Y/277VAC, it utilizes thermal-magnetic trip technology and features the signature Visi-Trip indicator to simplify troubleshooting and maintenance.Specifications
| Brand | Square D |
|---|---|
| Part Number | EH24040 |
| Series | EH |
| Amperage | 40A |
| Poles | 2 |
| Mounting Style | Plug-On |
| Voltage | 480Y/277VAC, 120/240VAC |
| Phase | 1 |
| AIC Rating | 14kA @ 480Y/277VAC, 65kA @ 120/240VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D NEHB Panelboards |
| Wire Gauge | 14-2 AWG (Cu), 12-2 AWG (Al) |
| Max Wire | 2 AWG |
| Min Wire | 14 AWG (Cu), 12 AWG (Al) |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, HACR, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Visual Trip Indicator |
Product FAQs
10 answersWhat panelboards are compatible with the EH24040 circuit breaker?
The EH24040 is designed exclusively for use in legacy Square D NEHB panelboards. It will not fit in modern NF or NQ panelboards.
Can I use an EDB circuit breaker to replace the EH24040?
No. While the EDB series replaced the EH and EHB series, EDB breakers are designed for modern NF panelboards and will not physically fit or connect to an NEHB panelboard bus.
Can I install the EH24040 in a Square D I-Line panelboard?
No, the EH24040 is an E-Frame breaker designed specifically for NEHB panelboards. I-Line panelboards require breakers with specialized plug-on brackets, such as the FA, LA, or PowerPact series.
How does the EH24040 connect to the panelboard bus?
The EH24040 features a plug-on connection type. If your NEHB panelboard requires a bolt-on connection, you will need the equivalent EHB series breaker, such as the EHB24040.
Do I need to purchase separate lugs for the EH24040?
No, the EH24040 comes with factory-installed mechanical lugs ready to accept 14 to 2 AWG copper or 12 to 2 AWG aluminum wire.
What does the 480Y/277VAC voltage rating indicate for system compatibility?
The 480Y/277VAC rating means this breaker is intended for use on solidly grounded wye electrical systems. It is not rated for use on 480V ungrounded delta or corner-grounded delta systems.
Are the trip settings on the EH24040 adjustable?
No, the EH24040 features a fixed thermal-magnetic trip unit with factory-set long-time and instantaneous functions. The trip curve cannot be field-adjusted.
Is the Square D EH24040 still actively manufactured?
No, the EH and EHB series breakers, along with their corresponding NEHB panelboards, are legacy products and have been discontinued by Schneider Electric.
What is the bolt-on equivalent to the EH24040?
The EHB24040 is the exact bolt-on equivalent for NEHB panelboards that require mechanical bolt-on connections rather than plug-on.
Does the EH24040 include Visi-Trip technology?
Yes, Square D EH series breakers feature a Visi-Trip indicator, which provides a highly visible red flag to help quickly identify a tripped breaker in the panel.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 7 reviews.
Total 5 star reviews: 7 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
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Rating
7 reviews
- TSThomas S.Verified BuyerReviewingSiemens EH3B020 - 20A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars11/6/25Great
Thanks
- JMJim M.ReviewingSiemens EH3B040 - 40A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars11/24/23They fit perfectly and saved
They fit perfectly and saved us a lot of money by being able to replace just these breakers
- KHKen H.ReviewingSiemens EH3B030 - 30A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars1/12/23Great service
Great service and products fast shipping
- JSJerry S.ReviewingSiemens / ITE EH3B070 - 70A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars4/20/22Great Price - Breakers Work Fine
My local Supplier was charging me three times the price for a breaker that i bought on super Breakers.
- MRMatt R.ReviewingSiemens EH3B020 - 20A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars7/6/2020 Amp Breaker
Received item quickly and in great shape. Thank you!!!