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Square D QJA221252 Molded Case Circuit Breaker
- 125A
- 2 Pole
- I-Line
Square D
QJA221252
Molded Case Circuit Breaker
Brand
Square D
SKU
QJA221252
Quantity
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Square D QJA221252 - 125A 2 Pole Molded Case Circuit Breaker
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Description
Built for demanding commercial applications, the Square D QJA221252 is a 2-pole, 125A molded case circuit breaker from the PowerPacT Q-Frame series. Designed with an I-Line mounting configuration and an AC phase connection, it integrates into Square D I-Line panelboards. It is also an exact substitute for the discontinued Q22125. With a high interrupting capacity of 100kA at 240VAC, it handles severe short circuits. The unit features standard LI trip functions and a Visi-Trip indicator.Specifications
| Brand | Square D |
|---|---|
| Part Number | QJA221252 |
| Series | QJA |
| Amperage | 125A |
| Poles | 2 |
| Mounting Style | I-Line |
| Voltage | 208Y/120VAC, 240VAC |
| Phase | 1 |
| AIC Rating | 100kA @ 208Y/120VAC, 100kA @ 240VAC |
| Frame Type | Q |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards and 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 | Phase Connection AC (Factory Configured) |
| Standards | CSA C22.2 No. 5, HACR, IEC 60947-2, NEMA AB 1, NOM-003-SCFI-2000, UL 489 |
| Approval | ANCE, CSA, IEC, NOM, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Non-Interchangeable Trip, Trip-Free Mechanism |
Product FAQs
8 answersCan I install the QJA221252 in a standard Square D QO or NQ load center?
No, this breaker features an I-Line style plug-in connection. It is exclusively compatible with Square D I-Line panelboards and switchboards, and will not fit in QO or NQ series load centers.
What does the J in the QJA221252 catalog number signify?
The J indicates the interrupting rating level within the PowerPacT Q-frame family. For this breaker, it denotes a 100kA interrupting capacity at 240VAC.
Does the QJA221252 come with factory-installed lugs?
Yes, it includes box-type lugs on the load side that accept 4 AWG to 300 kcmil aluminum or copper conductors. The line side utilizes the I-Line plug-in connection.
Is the trip unit on the QJA221252 adjustable?
No, this breaker features a fixed thermal and fixed magnetic trip unit. It provides standard long-time and instantaneous (LI) protection functions that cannot be field-adjusted.
What phase connection does the QJA221252 have?
The "2" at the end of the catalog number indicates that this 2-pole breaker is factory-configured for an AC phase connection on the I-Line bus.
Can the QJA221252 be used to replace older Q2 series breakers?
Yes, the PowerPacT Q-frame series is a direct replacement for discontinued Square D Q2 series devices. It can substitute older models like the Q22125 while providing a higher 100kA interrupting rating.
How much bus space does the QJA221252 require in an I-Line panelboard?
This 2-pole Q-frame breaker requires 3 inches of mounting height on the I-Line bus stack.
Does the QJA221252 include a push-to-trip feature?
Yes, it features an integral push-to-trip button on the cover. This allows you to manually trip the breaker to verify the mechanical operation of the trip mechanism.
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