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Square D Q2M3225MB Circuit Breaker
- 225
- 3 Pole
- Bolt-On
Square D
Q2M3225MB
Circuit Breaker
Brand
Square D
SKU
Q2M3225MB
Quantity
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Square D Q2M3225MB 3 Pole Circuit Breaker
New
Quantity
Quantity
Square D Q2M3225MB 3 Pole Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Part Number | Q2M3225MB-R |
| Series | Q2 |
| Amperage | 225 A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240V |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Frame Type | Q2M |
|---|---|
| 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 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator, Non-Interchangeable Trip, Main Breaker |
Quantity
Square D Q2M3225MB 3 Pole Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Series | Q2 |
| Amperage | 225 A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240V |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Frame Type | Q2M |
|---|---|
| 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 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator, Non-Interchangeable Trip, Main Breaker |
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Description
Square D Q2M3225MB 3 Pole Circuit Breaker
The Square D Q2M3225MB is a 3 Pole thermal magnetic molded case circuit breaker with a current rating of 225 Amps and a voltage rating of 240V. It has an interrupting rating of 10kAIC at 240V. The Q2M3225MB has a bolt-on connection type and includes long time and instantaneous trip functions.
Specifications
| Brand | Square D |
|---|---|
| Series | Q2 |
| Amperage | 225 A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240V |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Frame Type | Q2M |
|---|---|
| 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 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator, Non-Interchangeable Trip, Main Breaker |
Product FAQs
7 answersWhich panelboards are compatible with the Q2M3225MB?
This breaker is designed for installation in Square D QO load centers and legacy NQO panelboards.
What does the MB suffix indicate in the Q2M3225MB catalog number?
The MB designates this unit as a main breaker, intended to serve as the primary disconnect and overcurrent protection device in compatible Square D panels.
What wire sizes and materials are supported by the lugs on this breaker?
The factory-installed lugs accept either aluminum or copper conductors ranging from 4 AWG up to 300 kcmil.
How is the Q2M3225MB secured to the panel bus?
It utilizes a bolt-on connection, requiring it to be mechanically bolted directly to the busbars for a secure, high-amperage connection.
Is the trip unit on this breaker adjustable?
No, it features a fixed thermal-magnetic trip unit with non-adjustable long-time and instantaneous trip functions.
What type of protection does the LI trip function provide?
The LI designation indicates the thermal-magnetic trip unit provides Long-Time protection against sustained overloads and Instantaneous protection against short circuits.
Is the Q2M frame still in active production by Square D?
The Q2M frame is part of the legacy Q2 series of molded case circuit breakers. It is typically sourced to maintain or repair existing NQO or QO installations rather than for new construction.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 8 reviews.
Total 5 star reviews: 8 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
8 reviews
- MEMichael E.Verified BuyerReviewingSquare D Q221150AC - 150A 2 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars4/28/26breaker purchase
delivered on time and quality was as advertised
- MWmakalita w.Verified BuyerReviewingSquare D Q232150 - 150A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars3/18/26Prompt service.
Well packaged
- GSGreg S.Verified BuyerReviewingSquare D Q232200 - 200A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars9/29/25Great Job
Whenever I need a breaker and my local distributor can't handle or get what I need, Superbreakers has always come through for us.
- AWAllen W.ReviewingSquare D Q232175 - 175A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars6/17/22Great condition
The breakers were in great condition. The serve was also great.
- JCJim C.ReviewingSquare D Q232200 - 200A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars1/13/22Great Service
My order was received fast. The packaging was perfect. The quality of the product was what was expected.