Square D Q2M2100 Molded Case Circuit Breaker
- 100A
- 2 Pole
- Bolt-On
Square D
Q2M2100
Molded Case Circuit Breaker
Brand
Square D
SKU
Q2M2100
Quantity
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Square D Q2M2100 - 100A 2 Pole Molded Case Circuit Breaker
New
Quantity
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Description
Providing 100A of thermal-magnetic protection, this two-pole device features a secure bolt-on mounting style for commercial environments. It fits seamlessly into Square D QO load centers and NQ panelboards, ensuring stable power distribution. For facility managers maintaining older infrastructure, this Q2 frame unit offers an exact match, though it has been superseded by the QBM22100TN. The 10kAIC rating handles standard fault levels in 120/240VAC systems.Specifications
| Brand | Square D |
|---|---|
| Series | Q2 |
| Amperage | 100A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Frame Type | Q2M |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D QO Load Centers, NQ 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 | Mounting Kit |
| Standards | CSA C22.2 No. 5, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator |
Product FAQs
6 answersWhich panelboards are compatible with the Q2M2100?
This Q-frame breaker is designed to bolt directly into Square D QO load centers and NQ or NQO panelboards. It is frequently utilized as a main breaker in older residential QO load centers or as a branch breaker in commercial NQ panelboards.
What is the modern replacement for the legacy Q2M2100?
The Square D PowerPact Q-frame series is the direct factory replacement for legacy Q2 breakers. Specifically, the QBP22100TM serves as the modern equivalent, maintaining the same 100A rating, 2-pole configuration, and bolt-on mounting.
How is the Q2M2100 installed in a panelboard?
The Q2M2100 features a bolt-on mounting style. Unlike plug-on breakers, it must be mechanically fastened to the panelboard bus bars using screws or bolts, ensuring a secure connection that resists vibration and thermal cycling.
Can the Q2M2100 be utilized as a main breaker?
Yes, this 100A breaker is suitable for use as a main breaker in compatible Square D QO load centers, provided the enclosure is rated for a 100A main and accepts Q-frame bolt-on breakers.
How are the wire connections configured on the Q2M2100?
The breaker is equipped with load-side lugs that accept either aluminum or copper wiring from 4 AWG to 300 kcmil. The line side bolts directly to the panel bus.
Does the Q2M2100 provide ground fault or arc fault protection?
No, the Q2M2100 is a standard thermal-magnetic circuit breaker. It provides long-time overload and instantaneous short-circuit protection, but does not include GFCI or AFCI capabilities.
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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.