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Siemens MP240 Miniature Circuit Breaker
- 40A
- 2 Pole
- Plug-On
Siemens
MP240
Miniature Circuit Breaker
Brand
Siemens
SKU
MP240
Quantity
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Siemens MP240 - 40A 2 Pole Miniature Circuit Breaker
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Siemens MP240 - 40A 2 Pole Miniature Circuit Breaker
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| Brand | Siemens |
|---|---|
| Part Number | MP240 |
| Series | MP |
| Amperage | 40A |
| Poles | 2 |
| Mounting Style | Plug-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Frame Type | MP |
|---|---|
| Terminal Type | Lugs |
| For Use With | Murray Load Centers |
| Wire Gauge | 8-6 AWG (Cu), 8-4 AWG (Al) |
| Max Wire | 6 AWG (Cu), 4 AWG (Al) |
| Min Wire | 8 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Padlock Attachment |
|---|---|
| Standards | HACR, UL 489, CSA C22.2 No. 5 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Common Trip |
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Siemens MP240 - 40A 2 Pole Miniature Circuit Breaker
Re-Certified
Quantity
| Brand | Siemens |
|---|---|
| Part Number | MP240-R |
| Series | MP |
| Amperage | 40A |
| Poles | 2 |
| Mounting Style | Plug-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Frame Type | MP |
|---|---|
| Terminal Type | Lugs |
| For Use With | Murray Load Centers |
| Wire Gauge | 8-6 AWG (Cu), 8-4 AWG (Al) |
| Max Wire | 6 AWG (Cu), 4 AWG (Al) |
| Min Wire | 8 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Padlock Attachment |
|---|---|
| Standards | HACR, UL 489, CSA C22.2 No. 5 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Common Trip |
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Description
Part of the MP series, this 40-amp, two-pole miniature circuit breaker serves residential and commercial applications. It provides essential thermal-magnetic protection for branch circuits and heavy-duty appliances. This unit mounts into Murray load centers that accept plug-on breakers. It functions as a replacement for older installations and is officially superseded by the Siemens Q240 model for newer panel upgrades.Specifications
| Brand | Siemens |
|---|---|
| Part Number | MP240-R |
| Series | MP |
| Amperage | 40A |
| Poles | 2 |
| Mounting Style | Plug-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Frame Type | MP |
|---|---|
| Terminal Type | Lugs |
| For Use With | Murray Load Centers |
| Wire Gauge | 8-6 AWG (Cu), 8-4 AWG (Al) |
| Max Wire | 6 AWG (Cu), 4 AWG (Al) |
| Min Wire | 8 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Padlock Attachment |
|---|---|
| Standards | HACR, UL 489, CSA C22.2 No. 5 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Common Trip |
Product FAQs
5 answersCan I install the Siemens MP240 in a standard Siemens load center?
The MP240 is specifically UL listed for Murray load centers. For standard Siemens panels, you must use the equivalent QP series breaker, such as the Q240, unless your specific panel label explicitly permits MP-T frame breakers.
Is the Siemens MP240 a direct replacement for older Murray MP240 breakers?
Yes. Siemens acquired the Murray brand and continues to manufacture the MP series. The Siemens MP240 is the exact, UL listed replacement for the legacy Murray MP240.
What is the difference between the Siemens MP240 and Q240?
Both are 40A, 2-pole breakers manufactured by Siemens, but they have different UL listings. The MP240 (MP-T frame) is listed for Murray panels, while the Q240 (QP frame) is listed for Siemens panels. You must install the breaker type specified on your load center's wiring diagram.
Is the MP240 circuit breaker HACR rated?
Yes, this breaker is HACR rated. It is approved for use with heating, air conditioning, and refrigeration equipment that requires HACR circuit protection.
Are the terminals on the MP240 rated for aluminum conductors?
Yes, the lugs on this breaker accept both copper and aluminum wire. When using aluminum conductors, ensure the wire is sized correctly and apply a listed joint compound to prevent oxidation.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 4 reviews.
Total 5 star reviews: 4 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
4 reviews
- JVJulie V.Verified BuyerReviewingSiemens / Murray MP2100 - 100A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars3/5/26on breaker
so far so good on the refurbished breaker
- JFJon F.ReviewingSiemens / Murray MP250 - 50A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars12/17/20Sales
Fantastic group to work with...
- DSDavid S.ReviewingSiemens / Murray MP2100 - 100A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars1/5/20Thank you so much for
Thank you so much for sending me a 100 amp breaker that was in the condition that you said it would be in.With out your breaker I would still be in the dark Thank you David
- RARichard A.ReviewingSiemens / Murray MP2100 - 100A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars9/13/19Awesome!
Your prices and number of available items to choose from is Awesome!