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Siemens MP350 Miniature Circuit Breaker
- 50A
- 3 Pole
- Plug-On
Siemens
MP350
Miniature Circuit Breaker
Brand
Siemens
SKU
MP350
Quantity
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Siemens MP350 - 50A 3 Pole Miniature Circuit Breaker
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Description
Delivering high-capacity protection, the MP350 is a 50A, three-pole miniature circuit breaker rated for 240VAC. It utilizes thermal-magnetic trip technology to safeguard wiring from overloads. The plug-on configuration allows quick insertion into Murray and Siemens load centers. With the Murray brand phased out, users can cross-reference this unit to the Siemens Q350 for replacements. Rated at 10kAIC, this breaker includes common trip functionality and is HACR rated for HVAC equipment.Specifications
| Brand | Siemens |
|---|---|
| Part Number | MP350 |
| Series | MP |
| Amperage | 50A |
| 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 | 8-6 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 | CSA C22.2, HACR, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Common Trip, HACR Rated |
Product FAQs
5 answersCan I use the Siemens MP350 to replace an older Murray MP350 breaker?
Yes. Siemens acquired the Murray brand and now manufactures the MP series. The Siemens MP350 is a direct replacement for legacy Murray MP350 circuit breakers and fits the same Murray and Siemens load centers.
Which load centers are compatible with the MP350 circuit breaker?
This plug-on breaker is designed for use in both Murray and Siemens load centers that accept 3-pole, MP-type miniature circuit breakers.
What wire sizes are accepted by the lugs on the MP350?
The load side lug terminals accept 8 to 6 AWG copper wire or 8 to 4 AWG aluminum wire. Ensure proper torque specifications are followed during installation.
Is the Siemens MP350 suitable for HVAC equipment?
Yes, this breaker is HACR rated, meaning it is approved for use with heating, air conditioning, and refrigeration equipment that requires a 50A, 3-pole breaker.
How does the trip mechanism function on the MP350?
It utilizes a fixed thermal-magnetic trip unit with non-interchangeable long-time and instantaneous (LI) functions to protect against both sustained overloads and sudden short circuits.
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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!