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Siemens MP280 Miniature Circuit Breaker
- 80A
- 2 Pole
- Plug-On
Siemens
MP280
Miniature Circuit Breaker
Brand
Siemens
SKU
MP280
Quantity
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Siemens MP280 - 80A 2 Pole Miniature Circuit Breaker
New
Quantity
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Siemens MP280 - 80A 2 Pole Miniature Circuit Breaker
New
Quantity
| Brand | Siemens |
|---|---|
| Part Number | MP280 |
| Series | MP |
| Amperage | 80A |
| 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, Siemens Load Centers |
| Wire Gauge | 4-1/0 AWG (Cu), 2-1/0 AWG (Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 4 AWG (Cu), 2 AWG (Al) |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Padlock Attachment |
|---|---|
| Standards | HACR, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Common Trip |
Sold out
Quantity
Siemens MP280 - 80A 2 Pole Miniature Circuit Breaker
Re-Certified
Quantity
| Brand | Siemens |
|---|---|
| Part Number | MP280-R |
| Series | MP |
| Amperage | 80A |
| 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, Siemens Load Centers |
| Wire Gauge | 4-1/0 AWG (Cu), 2-1/0 AWG (Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 4 AWG (Cu), 2 AWG (Al) |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Padlock Attachment |
|---|---|
| Standards | HACR, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Common Trip |
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Description
Built for residential and commercial use, the MP280 is a two-pole, 80A miniature circuit breaker from Siemens. It utilizes thermal-magnetic trip technology to protect systems against overloads. This plug-on breaker mounts into Murray and Siemens load centers. It serves as an exact fit for older Murray panels and is officially replaced by the newer Q280 model. Rated at 10 kAIC at 120/240VAC, the unit features a common trip mechanism and is HACR rated for HVAC equipment.Specifications
| Brand | Siemens |
|---|---|
| Part Number | MP280 |
| Series | MP |
| Amperage | 80A |
| 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, Siemens Load Centers |
| Wire Gauge | 4-1/0 AWG (Cu), 2-1/0 AWG (Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 4 AWG (Cu), 2 AWG (Al) |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Padlock Attachment |
|---|---|
| Standards | HACR, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Common Trip |
Product FAQs
5 answersWhat is the direct replacement for the discontinued Murray MP280 circuit breaker?
The Siemens MP280 serves as an exact replacement for the legacy Murray MP280. Since Siemens acquired Murray and phased out the brand, they have cross-listed their breakers to ensure full compatibility with existing Murray load centers. The Siemens Q280 (Type QP) is also an officially recognized substitute.
Are Siemens and Murray breakers interchangeable for this 80-amp application?
Yes. Siemens acquired the Murray brand and officially lists their Type QP and MP-T breakers as interchangeable in most scenarios. The MP280 can be safely installed in both Siemens and Murray load centers, provided the panel label lists Type MP-T or QP as acceptable.
What type of wire can be used with the MP280 lugs?
The load side lugs are rated for both copper (4 AWG to 1/0 AWG) and aluminum (2 AWG to 1/0 AWG) conductors. When installing, ensure all wires are properly torqued to the specifications printed directly on the breaker to prevent high resistance connections.
Is the Siemens MP280 rated for HVAC equipment?
Yes, this thermal magnetic circuit breaker is HACR rated. This makes it suitable for use with heating, air conditioning, and refrigeration equipment that requires a dedicated 80-amp, 2-pole disconnect.
Does the MP280 provide GFCI or AFCI protection?
No, the MP280 is a standard thermal magnetic circuit breaker providing only overload and short-circuit protection through Long-Time and Instantaneous trip functions. It does not include Ground Fault (GFCI) or Arc Fault (AFCI) circuitry.
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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!