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Square D QJA221751 Molded Case Circuit Breaker
- 175A
- 2 Pole
- I-Line
Square D
QJA221751
Molded Case Circuit Breaker
Brand
Square D
SKU
QJA221751
Quantity
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Square D QJA221751 - 175A 2 Pole Molded Case Circuit Breaker
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Description
Built for demanding industrial applications, this 175A thermal-magnetic breaker delivers robust overcurrent protection. The device is configured with an AB phase connection. Designed for quick mounting, it fits securely into Square D I-Line panelboards. Facility managers can utilize this model to replace older Q22175 units, upgrading system safety. Rated for 100kAIC at 240VAC, the QJ-tier breaker safely clears massive fault currents and features a Visi-Trip indicator.Specifications
| Brand | Square D |
|---|---|
| Series | QJA |
| Amperage | 175A |
| 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, Alarm Switch, Undervoltage Release, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, HACR, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, IEC, NOM, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Current Limiting, Visual Trip Indicator, 80% Rated, Non-Interchangeable Trip |
Product FAQs
8 answersWhat type of panelboards is the QJA221751 compatible with?
This breaker is designed exclusively for use in Square D I-Line panelboards and switchboards. It features an I-Line style plug-in mounting design that connects directly to the busbar.
How does this breaker connect to the panelboard?
The line side features an I-Line plug-on connection that snaps directly onto the panelboard bus, while the load side uses traditional mechanical lugs for wire termination.
What phase connection does the QJA221751 use?
The 1 at the end of the catalog number indicates that this 2-pole breaker is factory configured for an AB phase connection on the I-Line bus.
What wire sizes are accepted by the lugs on this breaker?
The load-side box lugs on this breaker accept aluminum or copper conductors ranging from 4 AWG to 300 kcmil.
What does the J in the QJA221751 catalog number signify?
The J indicates the interrupting rating tier within the PowerPacT Q-Frame family. It signifies an extra-high interrupting capacity of 100kA at 240VAC.
Are the trip settings on the QJA221751 adjustable?
No, this thermal-magnetic breaker features fixed long-time and fixed instantaneous trip functions. The magnetic hold current is factory set at 1200A and the trip current is set at 2400A.
Can this breaker replace older Square D models?
Yes, PowerPacT Q-frame circuit breakers are direct replacements for discontinued Q2 Series devices. This model can be used to replace older Q22175 breakers to modernize existing systems.
Does this breaker include a tripped status indicator?
Yes, it features a Visi-Trip indicator that provides a clear visual confirmation when the breaker has tripped, allowing for quick fault identification in the panel.
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