Square D QJA221254 Molded Case Circuit Breaker
- 125A
- 2 Pole
- I-Line
Square D
QJA221254
Molded Case Circuit Breaker
Brand
Square D
SKU
QJA221254
Quantity
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Square D QJA221254 - 125A 2 Pole Molded Case Circuit Breaker
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Description
Providing robust thermal-magnetic protection, the Square D QJA221254 is a 2-pole, 125A MCCB from the PowerPacT Q-Frame family, suited for commercial facilities. Utilizing an I-Line plug-on design with a BC phase connection, it is compatible with Square D I-Line panelboards. It serves as a seamless replacement for the legacy Q22125. Rated for 100kAIC at 240VAC, it offers excellent current-limiting performance. The device includes fixed LI protection and a Visi-Trip indicator.Specifications
| Brand | Square D |
|---|---|
| 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 BC (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, Visual Trip Indicator, High Interrupting Capacity |
Product FAQs
5 answersWhat does the "4" suffix in the QJA221254 catalog number indicate?
The "4" at the end of the part number indicates that this breaker is factory-configured for a BC phase connection on the I-Line bus.
Can the QJA221254 replace older Square D circuit breakers?
Yes, PowerPacT Q-frame circuit breakers are direct replacements for legacy Square D Q2 series devices with matching specifications, such as the discontinued Q22125.
How does the connection type differ on QJA series breakers?
The "A" in the QJA prefix designates an I-Line plug-on connection on the line side (the ON end) and standard mechanical lugs on the load side (the OFF end). This allows the breaker to plug directly into the bus of an I-Line panelboard.
What does the "J" in the QJA221254 part number signify?
In the Square D PowerPacT catalog numbering system, the "J" designates the interrupting rating. For this Q-frame breaker, it signifies a high interrupting capacity of 100kA at 240VAC.
Can this 2-pole breaker be installed in a 3-phase panelboard?
Yes. While it is a 2-pole device, its BC phase configuration allows it to mount and draw power from the B and C phases of a 3-phase I-Line panelboard or switchboard.
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