Square D Q12100 Molded Case Circuit Breaker
- 100A
- 2 Pole
- Plug-On
Quantity
Square D Q12100 - 100A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Quantity
Square D Q12100 - 100A 2 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Part Number | Q12100 |
| Series | Q1 |
| Amperage | 100A |
| Poles | 2 |
| Mounting Style | Plug-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 240VAC |
| Frame Type | Q1 |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D Q1 Load Centers, NQO Panelboards |
| Wire Gauge | 6-1/0 AWG (Al/Cu) |
| Max Wire | 1/0 AWG |
| Min Wire | 6 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 |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | UL 489, CSA C22.2 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Common Trip |
Quantity
Square D Q12100 - 100A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Part Number | Q12100-R |
| Series | Q1 |
| Amperage | 100A |
| Poles | 2 |
| Mounting Style | Plug-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 240VAC |
| Frame Type | Q1 |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D Q1 Load Centers, NQO Panelboards |
| Wire Gauge | 6-1/0 AWG (Al/Cu) |
| Max Wire | 1/0 AWG |
| Min Wire | 6 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 |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | UL 489, CSA C22.2 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Common Trip |
Description
Built for residential and commercial applications, this legacy 100-amp molded case circuit breaker provides reliable thermal-magnetic protection. It mounts into older Square D Q1 load centers and NQO panelboards, serving as an exact fit for aging infrastructure. While modern installations use the QO2100 substitute, this original Q-Frame model maintains the classic Visi-Trip feature for rapid fault identification and delivers a standard 10kA interrupting capacity at 240VAC.Specifications
| Brand | Square D |
|---|---|
| Part Number | Q12100-R |
| Series | Q1 |
| Amperage | 100A |
| Poles | 2 |
| Mounting Style | Plug-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 240VAC |
| Frame Type | Q1 |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D Q1 Load Centers, NQO Panelboards |
| Wire Gauge | 6-1/0 AWG (Al/Cu) |
| Max Wire | 1/0 AWG |
| Min Wire | 6 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 |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | UL 489, CSA C22.2 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Common Trip |
Product FAQs
5 answersWhat panelboards are compatible with the Square D Q12100?
This plug-on circuit breaker is designed specifically for legacy Square D Q1 load centers and NQO panelboards. It cannot be used in NQOB panels, which require bolt-on connections.
Is there a modern substitute for the legacy Q12100?
Yes. The Square D QO2100 serves as a direct modern substitute for branch circuit applications. While the modern QO series has a more compact frame, both utilize a plug-on connection compatible with NQO panelboards.
How does the LI trip unit function on this Q1 breaker?
The LI designation indicates Long-Time and Instantaneous trip functions. The long-time delay provides fixed thermal protection against sustained overloads, while the instantaneous function offers fixed magnetic protection against short circuits.
Does this breaker feature a tripped indicator?
Yes, this original Q-Frame model includes the classic Square D Visi-Trip visual indicator. When the breaker trips due to an overload or short circuit, a visible red flag appears in the window to help quickly identify the faulted circuit.
How is the Q12100 secured to the panelboard bus?
It features a plug-on connection type. The breaker snaps directly onto the panel bus bar using internal spring clips, requiring no mounting screws.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 1 review.
- JTJeff T.ReviewingSquare D Q12100 - 100A 2 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars9/23/18Refurbished breaker
Found the correct breaker, it was very easy to find. Great price and shipped out on time. Definitely recommend this company.