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Square D QBM32150TN Molded Case Circuit Breaker
- 150A
- 3 Pole
- Unit Mount
Square D
QBM32150TN
Molded Case Circuit Breaker
Brand
Square D
SKU
QBM32150TN
Quantity
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Square D QBM32150TN - 150A 3 Pole Molded Case Circuit Breaker
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Description
Engineered for commercial applications, the Square D QBM32150TN is a 3-pole, 150A molded case circuit breaker from the PowerPact Q-Frame family. This unit-mount breaker installs into NQ and NQOD panelboards or switchboards. It serves as a direct replacement for the discontinued Q2M3150MT. The "TN" suffix indicates factory-installed studs on the load side. Featuring a fixed thermal-magnetic trip unit with LI functions, it delivers a 10kAIC rating at 240V. The breaker is HACR rated.Specifications
| Brand | Square D |
|---|---|
| Part Number | QBM32150TN |
| Series | QBM |
| Amperage | 150A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 208Y/120VAC, 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 208Y/120VAC, 10kA @ 240VAC |
| Frame Type | QBM |
|---|---|
| Terminal Type | Stud/Tapped Pad |
| For Use With | NQ Panelboards, NQOD Panelboards, Switchboards |
| 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, Padlock Attachment |
|---|---|
| Accessories | Factory-installed Studs on Load Side (TN Suffix) |
| Standards | CSA C22.2 No. 5, HACR, IEC 60947-2, NEMA AB 1, NOM-003-SCFI-2000, UL 489 |
| Approval | CSA, IEC, NOM, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Visual Trip Indicator, Non-Interchangeable Trip, Main Breaker |
Product FAQs
8 answersWhat older Square D circuit breaker does the QBM32150TN replace?
The QBM32150TN is a direct replacement for the discontinued legacy Q2M3150MT circuit breaker.
Which panelboards are compatible with the QBM32150TN breaker?
This PowerPacT Q-Frame breaker is designed for installation in Square D NQ and NQOD panelboards, as well as compatible switchboards.
What does the TN suffix in the QBM32150TN catalog number indicate?
The TN suffix indicates that the breaker comes with factory-installed studs on the OFF (load) end only, without nuts or washers, for specialized bus or terminal connections.
Does this breaker feature a visual trip indicator?
Yes, it includes a visual trip indicator that provides a clear confirmation when the breaker has tripped, allowing for faster troubleshooting in crowded panels.
Is the QBM32150TN suitable for use with heating, air conditioning, and refrigeration equipment?
Yes, this breaker is HACR rated, making it suitable for protecting multi-motor HVAC and refrigeration circuits.
How is the QBM32150TN mounted in a panelboard?
It is a unit-mount, bolt-on circuit breaker. Unlike plug-on breakers, it requires mechanical fasteners to secure it directly to the panelboard bus or mounting pan, providing a highly secure connection for high-amperage commercial applications.
Can I adjust the trip settings on the QBM32150TN?
No, this breaker features a fixed thermal and fixed magnetic trip unit. The Long-Time and Instantaneous (LI) trip thresholds are factory set and cannot be adjusted in the field.
Can the QBM32150TN be used on a 480V electrical system?
No, this breaker has a maximum voltage rating of 240VAC. It is not designed or rated for use on 480V or 600V electrical systems.
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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
- MPMichael P.Verified BuyerReviewingSquare D QBM32200TN - 200A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars4/14/26Owner…..Payne Electric
Got exactly what I ordered.
- TMTony M.Verified BuyerRated 5 out of 5 stars12/12/25Square D circuit breakers
As always, I order circuit breakers from super breakers and I receive my order the very next day. Great service, very dependable. !
Also there prices are great .
Tony