Square D Q2M2125MT Molded Case Circuit Breaker
- 125A
- 2 Pole
- Bolt-On
Quantity
Square D Q2M2125MT - 125A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Part of the legacy Q2M series, the Square D Q2M2125MT is a 2-pole, 125A molded case circuit breaker. It provides essential thermal-magnetic protection for metering applications. This bolt-on unit mounts into Square D EZ Meter-Pak and Meter Centers. It connects via line side mounting studs. The QBM22125TN serves as its modern replacement. With a 120/240VAC rating, it handles up to 10kA of fault current. It includes a Visi-Trip indicator for quick status checks.Specifications
| Brand | Square D |
|---|---|
| Part Number | Q2M2125MT-R |
| Series | Q2M |
| Amperage | 125A |
| 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 EZ Meter-Pak, Meter Centers |
| 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, Alarm Switch |
|---|---|
| Accessories | Line Side Mounting Studs |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator, Non-Interchangeable Trip, Main Breaker |
Product FAQs
6 answersWhat enclosures are compatible with the Q2M2125MT circuit breaker?
This breaker is specifically designed for use as a main breaker in Square D EZ Meter-Pak and Meter Center enclosures.
How does this breaker connect within the meter center?
The Q2M2125MT is a bolt-on breaker that connects to the meter center bus using line side mounting studs. The load side features standard lug terminals for outgoing wiring.
What wire sizes and materials are accepted by the load side lugs?
The load side lugs are rated for both aluminum and copper conductors, accepting wire sizes from 4 AWG up to 300 kcmil.
What is the modern replacement for the legacy Q2M2125MT?
The Square D QBM22125TN is the direct modern replacement for this legacy Q2M series breaker in metering applications.
What does the 10kAIC rating indicate for this main breaker?
The 10kAIC interrupting rating means the breaker can safely clear a maximum fault current of 10,000 amps at 240V AC without sustaining catastrophic damage.
How does the thermal magnetic trip unit function on this model?
The non-interchangeable trip unit uses a bimetallic thermal element to protect against prolonged overloads and a magnetic mechanism to trip instantaneously during severe short circuits.
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