Square D Q2M3150MT Molded Case Circuit Breaker
- 150A
- 3 Pole
- Bolt-On
Quantity
Square D Q2M3150MT - 150A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Quantity
Square D Q2M3150MT - 150A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Part Number | Q2M3150MT |
| Series | Q2 |
| Amperage | 150A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Frame Type | Q2M |
|---|---|
| Terminal Type | Stud/Tapped Pad |
| For Use With | Square D Metering Equipment, EZ Meter-Pak |
| 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 |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Load Side Studs |
| Standards | CSA C22.2 No. 5, UL 489, NEMA AB 1 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator, Non-Interchangeable Trip |
Quantity
Square D Q2M3150MT - 150A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Part Number | Q2M3150MT |
| Series | Q2 |
| Amperage | 150A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Frame Type | Q2M |
|---|---|
| Terminal Type | Stud/Tapped Pad |
| For Use With | Square D Metering Equipment, EZ Meter-Pak |
| 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 |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Load Side Studs |
| Standards | CSA C22.2 No. 5, UL 489, NEMA AB 1 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator, Non-Interchangeable Trip |
Description
Built for commercial and industrial applications, the Square D Q2M3150MT delivers reliable 150A thermal-magnetic protection. It utilizes fixed long-time and instantaneous trip functions. This bolt-on unit integrates into Square D metering equipment and EZ Meter-Pak enclosures using load side studs. For modern upgrades, this legacy frame is replaced by the QBM32150TN. It features a 10kA rating at 240VAC, HACR certification, and a Visi-Trip indicator.Specifications
| Brand | Square D |
|---|---|
| Part Number | Q2M3150MT |
| Series | Q2 |
| Amperage | 150A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Frame Type | Q2M |
|---|---|
| Terminal Type | Stud/Tapped Pad |
| For Use With | Square D Metering Equipment, EZ Meter-Pak |
| 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 |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Load Side Studs |
| Standards | CSA C22.2 No. 5, UL 489, NEMA AB 1 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator, Non-Interchangeable Trip |
Product FAQs
6 answersWhat enclosures are compatible with the Q2M3150MT circuit breaker?
This 3-pole breaker is specifically engineered for installation in Square D Metering Equipment and EZ Meter-Pak enclosures.
What is the modern replacement for the legacy Q2M3150MT?
The Q2M3150MT is a legacy Q-Frame breaker. Square D has replaced this model with the QBM32150TN for modern upgrades and direct replacements.
How is the Q2M3150MT installed into metering equipment?
This breaker utilizes a bolt-on mounting configuration and features stud or tapped pad terminal connections on the load side for secure integration into the meter pack bus.
What wire gauges and materials are supported by the load side terminals?
The terminals are rated to accept either aluminum or copper conductors, accommodating wire sizes from 4 AWG up to 300 kcmil.
Does the Q2M3150MT offer adjustable trip settings?
No, this thermal-magnetic breaker features fixed long-time and instantaneous trip functions, meaning the trip curve cannot be field-adjusted.
Does the Q2M3150MT include a visual trip indicator?
Yes, this model features a Visi-Trip indicator, providing clear visual confirmation when the breaker has tripped due to an overcurrent or short-circuit event.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 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.