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Siemens MP370 Miniature Circuit Breaker
- 70A
- 3 Pole
- Plug-On
Siemens
MP370
Miniature Circuit Breaker
Brand
Siemens
SKU
MP370
Quantity
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Siemens MP370 - 70A 3 Pole Miniature Circuit Breaker
Re-Certified
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Siemens MP370 - 70A 3 Pole Miniature Circuit Breaker
New
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| Brand | Siemens |
|---|---|
| Part Number | MP370 |
| Series | MP |
| Amperage | 70A |
| Poles | 3 |
| Mounting Style | Plug-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Murray Load Centers, Siemens Load Centers |
| Wire Gauge | 8-2 AWG (Cu/Al) |
| Max Wire | 2 AWG |
| Min Wire | 8 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Padlock Attachment |
|---|---|
| Standards | CSA C22.2, HACR, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Common Trip |
Sold out
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Siemens MP370 - 70A 3 Pole Miniature Circuit Breaker
Re-Certified
Quantity
| Brand | Siemens |
|---|---|
| Part Number | MP370-R |
| Series | MP |
| Amperage | 70A |
| Poles | 3 |
| Mounting Style | Plug-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Murray Load Centers, Siemens Load Centers |
| Wire Gauge | 8-2 AWG (Cu/Al) |
| Max Wire | 2 AWG |
| Min Wire | 8 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Padlock Attachment |
|---|---|
| Standards | CSA C22.2, HACR, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Common Trip |
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Description
Built to secure commercial and industrial electrical systems, the MP370 provides consistent thermal-magnetic trip performance. This 70-amp, three-pole device ensures safe operation for higher-draw equipment. The plug-on configuration mounts effortlessly into standard Murray or Siemens panelboards. For maintenance and upgrades, it is officially substituted by the Siemens Q370, offering a clear upgrade path. With a standard 10kAIC rating at 240VAC, it effectively clears fault currents.Specifications
| Brand | Siemens |
|---|---|
| Part Number | MP370-R |
| Series | MP |
| Amperage | 70A |
| Poles | 3 |
| Mounting Style | Plug-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Murray Load Centers, Siemens Load Centers |
| Wire Gauge | 8-2 AWG (Cu/Al) |
| Max Wire | 2 AWG |
| Min Wire | 8 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Padlock Attachment |
|---|---|
| Standards | CSA C22.2, HACR, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Common Trip |
Product FAQs
6 answersCan I install the Siemens MP370 in a legacy Murray electrical panel?
Yes, the MP370 is fully compatible with legacy Murray load centers. Siemens manufactures the MP series (MP-T frame) as a direct, UL-listed replacement for older Murray panels.
What is the difference between the Siemens MP370 and the Murray MP370?
There is no functional difference. Siemens produces the MP370 as the direct replacement for the legacy Murray MP370. Both utilize the same MP-T frame and plug-on configuration.
Is there a Siemens QP series equivalent for the MP370?
Yes, the Siemens Q370 is the QP series equivalent to the MP370. While the MP370 is specifically designated as an MP-T frame for Murray panels, the Q370 provides the same 70-amp, 3-pole protection for Siemens load centers.
What does the LI trip function code mean on the MP370?
The LI designation indicates that this thermal-magnetic breaker provides Long-Time (thermal) protection for sustained overloads and Instantaneous (magnetic) protection for immediate short-circuit clearing.
Does the MP370 require bolt-on hardware for installation?
No, the MP370 features a plug-on mounting design. It snaps directly onto the busbar of compatible Siemens and Murray load centers, securing the connection without the need for mounting screws or bolts.
Is the MP370 suitable for high-fault commercial applications?
The MP370 has a standard interrupting rating of 10kA at 240V AC. It is suitable for applications where the available fault current does not exceed 10,000 amps. For systems requiring a higher AIC rating, a different breaker series is necessary.
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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!