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Siemens Q370 Miniature Circuit Breaker
- 70A
- 3 Pole
- Plug-On
Siemens
Q370
Miniature Circuit Breaker
Brand
Siemens
SKU
Q370
Quantity
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Siemens Q370 - 70A 3 Pole Miniature Circuit Breaker
New
Quantity
Quantity
Siemens Q370 - 70A 3 Pole Miniature Circuit Breaker
New
Quantity
| Brand | Siemens |
|---|---|
| Part Number | Q370 |
| Series | QP |
| Amperage | 70A |
| Poles | 3 |
| Mounting Style | Plug-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Frame Type | Q |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Load Centers, Siemens P1 Panelboards |
| Wire Gauge | 4-1/0 AWG (Cu), 3-2/0 AWG (Al) |
| Max Wire | 1/0 AWG (Cu), 2/0 AWG (Al) |
| Min Wire | 4 AWG (Cu), 3 AWG (Al) |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Padlock Attachment |
|---|---|
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Common Trip, HACR Rated |
Sold out
Quantity
Siemens Q370 - 70A 3 Pole Miniature Circuit Breaker
Re-Certified
Quantity
| Brand | Siemens |
|---|---|
| Part Number | Q370-R |
| Series | QP |
| Amperage | 70A |
| Poles | 3 |
| Mounting Style | Plug-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Frame Type | Q |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Load Centers, Siemens P1 Panelboards |
| Wire Gauge | 4-1/0 AWG (Cu), 3-2/0 AWG (Al) |
| Max Wire | 1/0 AWG (Cu), 2/0 AWG (Al) |
| Min Wire | 4 AWG (Cu), 3 AWG (Al) |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Padlock Attachment |
|---|---|
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Common Trip, HACR Rated |
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Description
Providing standard 10kAIC interrupting capacity at 240V, this three-pole QP series breaker handles residential and commercial distribution tasks. It installs into Siemens EQ, PL, ES, and Ultimate load centers, as well as P1 panelboards. Featuring a common trip mechanism and HACR rating, it seamlessly replaces legacy Murray MP370 units for HVAC, motor, and general branch circuit applications.Specifications
| Brand | Siemens |
|---|---|
| Part Number | Q370 |
| Series | QP |
| Amperage | 70A |
| Poles | 3 |
| Mounting Style | Plug-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Frame Type | Q |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Load Centers, Siemens P1 Panelboards |
| Wire Gauge | 4-1/0 AWG (Cu), 3-2/0 AWG (Al) |
| Max Wire | 1/0 AWG (Cu), 2/0 AWG (Al) |
| Min Wire | 4 AWG (Cu), 3 AWG (Al) |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Padlock Attachment |
|---|---|
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Common Trip, HACR Rated |
Product FAQs
5 answersCan the Siemens Q370 be used to replace an older Murray circuit breaker?
Yes. Siemens acquired the Murray brand and officially phased out the MP-T product line. The Siemens QP series is the manufacturer-approved direct replacement for legacy Murray breakers, meaning the Q370 can seamlessly replace an older Murray MP370 3-pole breaker.
How much panel space does the Q370 require?
The Q370 is a full-size standard QP series breaker that occupies 1 inch per pole. As a 3-pole breaker, it requires exactly three standard 1-inch spaces in your load center or panelboard.
Is the Siemens Q370 HACR rated for HVAC applications?
Yes. This 70A thermal-magnetic breaker is HACR rated, making it fully approved for protecting heating, air conditioning, and refrigeration branch circuits.
Can I install this breaker in a GE, Eaton, or Square D panel?
No. The Q370 is UL listed exclusively for use in compatible Siemens load centers, Siemens P1 panelboards, and approved legacy Murray or ITE enclosures. Installing it in other manufacturers' panels violates UL listings and electrical codes.
What protection does the LI trip function provide?
The LI designation means the breaker features Long-Time and Instantaneous trip functions. The long-time thermal element protects against sustained overloads, while the instantaneous magnetic element clears severe short circuits immediately.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 2 reviews.
Total 5 star reviews: 2 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
2 reviews
- JMJohn M.Rated 5 out of 5 stars7/16/20Fast shipping, as advertised
Breaker came quickly and just as advertised.
- RPRoland P.Rated 5 out of 5 stars10/28/18Perfect Match
Exactly what I needed and fast service