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Square D Q2M3175MB Molded Case Circuit Breaker
- 175A
- 3 Pole
- Bolt-On
Square D
Q2M3175MB
Molded Case Circuit Breaker
Brand
Square D
SKU
Q2M3175MB
Quantity
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Square D Q2M3175MB - 175A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Square D Q2M3175MB - 175A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Part Number | Q2M3175MB-R |
| Series | Q2M |
| Amperage | 175A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D QO Load Centers, NQO Panelboards |
| Wire Gauge | 4 AWG - 300 kcmil (Al/Cu) |
| Max Wire | 300 kcmil |
| Min Wire | 4 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Load Side Lugs Included, Mounting Hardware |
| Standards | UL 489, CSA C22.2 No. 5 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator, Non-Interchangeable Trip, Main Breaker |
Quantity
Square D Q2M3175MB - 175A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Part Number | Q2M3175MB-R |
| Series | Q2M |
| Amperage | 175A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D QO Load Centers, NQO Panelboards |
| Wire Gauge | 4 AWG - 300 kcmil (Al/Cu) |
| Max Wire | 300 kcmil |
| Min Wire | 4 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Load Side Lugs Included, Mounting Hardware |
| Standards | UL 489, CSA C22.2 No. 5 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator, Non-Interchangeable Trip, Main Breaker |
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Description
Built for commercial use, the Square D Q2M3175MB is a 3-pole, 175A molded case circuit breaker from the legacy Q-Frame family. This bolt-on breaker mounts into Square D QO load centers and NQO panelboards. For modern upgrades, it is superseded by the QBP32175TP. Rated for 10kAIC at 240VAC, it features a non-interchangeable thermal-magnetic trip unit. The bottom-mounting design includes line-side studs and load-side lugs for 4 AWG to 300 kcmil wire.Specifications
| Brand | Square D |
|---|---|
| Part Number | Q2M3175MB-R |
| Series | Q2M |
| Amperage | 175A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D QO Load Centers, NQO Panelboards |
| Wire Gauge | 4 AWG - 300 kcmil (Al/Cu) |
| Max Wire | 300 kcmil |
| Min Wire | 4 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Load Side Lugs Included, Mounting Hardware |
| Standards | UL 489, CSA C22.2 No. 5 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator, Non-Interchangeable Trip, Main Breaker |
Product FAQs
7 answersWhich electrical panels are compatible with the Q2M3175MB circuit breaker?
This legacy Q-Frame breaker is designed specifically for bolt-on installation in Square D QO load centers and NQO panelboards.
What is the modern replacement for the legacy Q2M3175MB?
For new installations or modern upgrades, the legacy Q2M3175MB has been superseded by the PowerPact Q-Frame series. Common direct replacements include the QBM32175TN or QBP32175TP, depending on your specific panel configuration.
What wire gauge is required for the terminals on the Q2M3175MB?
The factory-installed lugs accept either aluminum or copper conductors ranging from 4 AWG to 300 kcmil. Ensure conductors are sized appropriately for a 175A load per NEC guidelines.
Are the trip settings adjustable on the Q2M3175MB?
No, this breaker features a non-interchangeable thermal magnetic trip unit with fixed thermal and fixed magnetic settings. It provides standard long-time and instantaneous (LI) protection without adjustable dials.
Does the Q2M3175MB use a plug-on or bolt-on connection?
It utilizes a bolt-on connection. This requires physically bolting the breaker to the panel busbar, providing a secure, vibration-resistant connection typical in commercial NQO panelboards.
Is the Q2M3175MB suitable for high fault current applications?
This breaker has a standard interrupting rating of 10kAIC at 240V AC. It must only be installed in systems where the available fault current does not exceed 10,000 amps to ensure safe operation.
Can the Q2M3175MB be used in single-phase applications?
The Q2M3175MB is a 3-pole circuit breaker built for 3-phase electrical systems. It is specifically intended for 3-phase NQO panelboards and 3-phase QO load centers.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 1 review.
Total 5 star reviews: 1 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
1 review
- VGVern G.Verified BuyerReviewingSquare D Q2M3200MT - 200A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars2/4/26Good breaker. No problems. Direct replacement.
Superbreakers was great to work with. The salesman checked and didn't have the breaker I was looking for, but found one at another location, had it shipped to me next day air, and it worked out great. Glad to see this type of customer service. I will call on them again when needed.