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Wadsworth A240NI Miniature Circuit Breaker
- 40A
- 2 Pole
- Plug-On
Wadsworth
A240NI
Miniature Circuit Breaker
Brand
Wadsworth
SKU
A240NI
Quantity
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Wadsworth A240NI - 40A 2 Pole Miniature Circuit Breaker
Re-Certified
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Wadsworth A240NI - 40A 2 Pole Miniature Circuit Breaker
New
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| Brand | Wadsworth |
|---|---|
| Part Number | A240NI |
| Series | A |
| Amperage | 40A |
| Poles | 2 |
| Mounting Style | Plug-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Terminal Type | Box Lugs |
|---|---|
| For Use With | Wadsworth Type A Load Centers |
| Wire Gauge | 14-6 AWG |
| Max Wire | 6 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Standards | UL 489 |
|---|---|
| Approval | UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Class CTL |
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Wadsworth A240NI - 40A 2 Pole Miniature Circuit Breaker
Re-Certified
Quantity
| Brand | Wadsworth |
|---|---|
| Part Number | A240NI-R |
| Series | A |
| Amperage | 40A |
| Poles | 2 |
| Mounting Style | Plug-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Terminal Type | Box Lugs |
|---|---|
| For Use With | Wadsworth Type A Load Centers |
| Wire Gauge | 14-6 AWG |
| Max Wire | 6 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Standards | UL 489 |
|---|---|
| Approval | UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Class CTL |
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Description
Sourced for older residential applications, this 40-amp, two-pole component restores power distribution in aging infrastructure. It provides reliable thermal-magnetic protection for 240V appliances like electric ranges or medium HVAC units. Designed specifically for Wadsworth Type A load centers, the unit features a metal foot and Class CTL rejection mechanism. For modern alternatives, the UBIA240NI serves as a recognized substitute. Non-interchangeable (NI) construction ensures proper fitment.Specifications
| Brand | Wadsworth |
|---|---|
| Part Number | A240NI-R |
| Series | A |
| Amperage | 40A |
| Poles | 2 |
| Mounting Style | Plug-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Terminal Type | Box Lugs |
|---|---|
| For Use With | Wadsworth Type A Load Centers |
| Wire Gauge | 14-6 AWG |
| Max Wire | 6 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Standards | UL 489 |
|---|---|
| Approval | UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Class CTL |
Product FAQs
5 answersCan the Wadsworth A240NI be installed in non-Wadsworth panels?
No. This breaker features a non-interchangeable (NI) construction specifically engineered for Wadsworth Type A load centers. It cannot be safely installed in panels from other manufacturers.
Is there an active replacement for the obsolete Wadsworth A240NI?
Yes. Connecticut Electric produces a modern, ETL-listed replacement under the catalog number UBIA240NI, which is designed as a direct substitute for Wadsworth Type A panels.
What physical features secure this breaker into the load center?
The A240NI uses a plug-on mounting configuration equipped with a metal foot. It also incorporates a Class CTL rejection mechanism to ensure proper seating and prevent installation in restricted panel spaces.
What typical loads does this 40A breaker support?
A 40-amp, two-pole breaker is commonly deployed to protect 240V residential and light commercial circuits, such as those powering electric ranges, medium HVAC equipment, or dedicated subpanels.
How does the Class CTL feature protect the electrical panel?
The Circuit Total Limiting (CTL) mechanism physically rejects the breaker if an installer attempts to place it in a panel slot that would exceed the load center's maximum designed circuit capacity, preventing dangerous overloads.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 5 reviews.
Total 5 star reviews: 5 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
5 reviews
- PSPaul S.Verified BuyerReviewingWadsworth A15NI - 15A 1 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars7/14/26Worked fine, glad to have it.
I had no idea how much it could cost.
- DPDavid P.Verified BuyerReviewingSquare D 9065ARO1R Overload RelayI recommend this productRated 5 out of 5 stars11/3/25Loved it!
Fantastic!!!
- KJKevin J.ReviewingWadsworth A260NI - 60A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars1/11/24Great deal
Came on time in great shape
- VJVernice J.ReviewingWadsworth A240NI - 40A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars7/16/20Order of Breaker
This company did an excellent job with providing a good part and delivery exceeded my expectations.
- HOHugh O.ReviewingGeneral Electric AF43S Panel Board CoverI recommend this productRated 5 out of 5 stars9/24/17Breaker panel
I recently purchased a breaker panel cover. It arrived in a timely manner well packed and unharmed.
The shipping was free so I was sceptical.
All is well.