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Square D QJA221754 Molded Case Circuit Breaker
- 175A
- 2 Pole
- I-Line
Square D
QJA221754
Molded Case Circuit Breaker
Brand
Square D
SKU
QJA221754
Quantity
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Square D QJA221754 - 175A 2 Pole Molded Case Circuit Breaker
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Description
Engineered for commercial distribution, the Square D QJA221754 is a 2-pole, 175A molded case circuit breaker from the PowerPacT Q-Frame family. It provides reliable overcurrent protection for 240VAC systems. Designed for Square D I-Line panelboards, it features a plug-on line connection and serves as a direct replacement for legacy Q22175 breakers with a BC phase configuration. Rated at 100kAIC, it utilizes fixed thermal magnetic trip technology and includes a Visi-Trip visual indicator.Specifications
| Brand | Square D |
|---|---|
| Series | QJA |
| Amperage | 175A |
| Poles | 2 |
| Mounting Style | I-Line |
| Voltage | 240VAC |
| Phase | 1 |
| AIC Rating | 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, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Phase Connection BC (Factory Configured) |
| Standards | CSA C22.2 No. 5, HACR Rated, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, IEC, NOM, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Visual Trip Indicator, Phase Connection BC, High Interrupting Capacity |
Product FAQs
7 answersWhich panelboards are compatible with the QJA221754 circuit breaker?
This breaker is designed exclusively for use in Square D I-Line panelboards and switchboards. It features an I-Line style plug-on connection and cannot be installed in standard load centers or non-I-Line commercial panels.
Can the QJA221754 replace older Square D circuit breakers?
Yes, the PowerPacT Q-Frame series is the direct replacement for legacy Square D Q2 series breakers. The QJA221754 can be used to replace an obsolete Q22175 breaker, provided the panel requires a BC phase configuration.
What does the 4 at the end of the QJA221754 catalog number indicate?
The 4 signifies that this 2-pole breaker is factory-configured for a BC phase connection on the I-Line bus. If your panel requires an AC or AB phase connection, you will need a different catalog number variant.
What size wire is accepted by the lugs on the QJA221754?
The box lugs on this breaker accept aluminum or copper conductors ranging from 4 AWG to 300 kcmil. Ensure proper torque specifications are followed during installation.
Is the QJA221754 suitable for systems with high available fault currents?
Yes, this breaker features a high interrupting rating of 100kAIC at 240VAC, making it suitable for commercial and industrial distribution systems that require robust fault-clearing capabilities.
Does this breaker provide a visual indication when it trips?
Yes, PowerPacT Q-Frame breakers feature a Visi-Trip indicator. The handle will move to a center tripped position, providing clear visual confirmation when the breaker has operated due to an overcurrent or short-circuit fault.
Do I need additional mounting hardware to install the QJA221754 in an I-Line panel?
No additional mounting hardware is required. The breaker utilizes a plug-on I-Line connection that mounts directly to the panelboard bus, securing the line side without separate brackets or fasteners.
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